So, in order for a Ceo to make carbon plus oxygen Gus, we must first formulate the mathematical formula for it. What does CO2 therefore equal? 8.5 g oh from there.
How many granules of CO2 are employed to make 6.5 grams of O2?Here, Bye Cyclorama four from 6.5g of 02 twice one mode of 021 per 32g of co, two from one mole of CO2 times 24.1 g of c 02 per one molecule of c 02, and three from one mole for 02 times 6.5g of 02 times 32g of co. As a result, this CO2 mask is equivalent to 8.9 grams of CO2. I'm grateful.
How is CO2 yield determined?The best approximate method to get your carbonated drink production facility's CO2 Yield is to divide the amount of carbonated beverages generated during the investigated time divided by the amount of CO2 that was consumed each month.
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based on your previous answer what can you say about boiling points of sulfur based derivatives if their boiling points are about the same? (2 pts)
The boiling points of sulfur based derivatives if their boiling points are about the same.
What is boiling point?
When a liquid's vapor pressure equals that of the gas above it, that liquid has reached its boiling point. When a liquid's vapor pressure reaches one atmosphere, it is said to have reached its usual boiling point (760 torr). a microscopic image of a bubble in boiling water.
What is sulfur?
Non-metallic chemical element utilized mostly in the form of sulfuric acid to extract phosphates from ores. It is a vital component of all life and shares many chemical characteristics with oxygen.
Therefore, boiling points of sulfur based derivatives if their boiling points are about the same.
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a smoke sample contains dust particales and several different gases, which have different combinations of molecules. the dust particiles are suspended in the gases. Which term or terms could be used to describe this sample of smoke?
mixture, heterogenous mixture, homogenous mixture, solution, pure chemical substance, compound, element
The term or terms that could be used to describe this sample of smoke are "mixture" and "heterogeneous mixture".
A mixture is a combination of two or more substances in which each substance retains its own chemical properties and can be separated by physical means, such as filtering or distillation. A heterogeneous mixture is a type of mixture in which the different components can be easily seen or distinguished and are not evenly distributed throughout the mixture.
In this case, the dust particles and gases are different substances that can be distinguished and are not evenly distributed throughout the sample, therefore it is a heterogeneous mixture.
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1. In attempting to determine the percentage of water in a hydrate, a lab group decided to
save time by heating for only 5 minutes instead of 10 minutes. The evaporating dish and
its contents were weighed at this time. A second heating was not performed. Do they risk
their percentage water calculation being too high or too low? Explain.
2. A lab group is rushed to complete their lab and after heating, they wait until the
following day to weigh what remains in the evaporating dish. What could happen that
would throw off results if a lab group delays weighing after heating?
Yes, they risk their percentage water being too high.
The hydrate might absorb air moisture that would cause a higher percentage calculation of water.
How to measure water percentage error?If the lab group only heats the hydrate for 5 minutes instead of 10 minutes, they risk their percentage water calculation being too high. This is because when heating a hydrate, the water molecules are removed from the crystal structure, and if the heating is not done for long enough, not all of the water molecules will have been removed, resulting in a higher percentage of water calculated.
If a lab group delays weighing after heating, several things could happen that would throw off the results. One possibility is that the hydrate could absorb moisture from the air, which would result in a higher percentage of water calculated. Additionally, if the contents of the evaporating dish are not properly sealed, there is a risk of evaporation of the remaining water which would result in a lower percentage of water calculated. In addition, the hydrate could become contaminated with other substances, which would also result in inaccurate results
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Using the reagents below, list in order (by letter, no period) those necessary to prepare 2-bromo-3-methylbutane from 2-methylbutane. Note: Not all spaces provided may be needed. Type "na" in any space where you have no reagent. a. Br2, heat, light b. Na, (-H2) c. NaI(SN2) d. NH4NO3 e. HBr, ROOR f. EtoH g. NaOEt, EtoH, heat
When ethanolic KOH and 2-Bromo-2-methyl butane are refluxed, the main product that results is 2-methylbut-2-ene. A combination of 2-methyl-2-butene and 2-methyl-I-butene is created when 2-bromo-2-methylbutane is subjected to a base reaction.
2-Methyl-L-Butene makes up 459 of the resultant mixture when potassium hydroxide is the base. Because the bromine-attached carbon atom is linked to the other two carbon atoms, the molecule is known as a secondary alkyl halide. As a result, 2-bromobutane is known as a secondary alkyl halide. The liquid is colorless and has a lovely aroma. Since 1-bromobutane is a main alkyl halide, it is created through bimolecular nucleophilic substitution processes (Sn2).
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pure substances melt over a temperature range. a. mixtures melt at a and over temperature range. b. if the mixture of the unknown with aspirin shows of melting point then the unknow is aspirin. c. if the mixture of the unknow urea shows of melting point then the unknown is urea
The pure substances melts over the narrow temperature range. The pure substances are the single element or the compound.
a) Mixtures melt at a "lower temperature" than the pure components and over the "greater" temperature range.
b)If the mixture of the unknown with aspirin shows "no depression or the expansion" of the melting point then the unknown is aspirin.
c) If the mixture of the unknown with urea shows "no depression or the expansion" of melting point then the unknown is urea.
The melting point is the temperature of the substance at which it starts changes it sate from the solid to a liquid.
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Draw structural formulas for organic products A and B in the window below. CH3 Cul Li pentane A CH3CH2CHCHCH3 | Br B • Draw only products having the organic portion of the original alkyl halide. • Draw carbon-lithium bonds using the single bond tool. If a structure has a copper-lithium bond, do not draw the lithium. Separate products from different steps using the
Organic product A is a five-carbon chain, pentane, which can be drawn as CH3CH2CHCHCH3.
What is organic products?Organic products are foods and other items that are produced without the use of synthetic chemicals, hormones, antibiotics, or genetic engineering. Organic products are grown without conventional pesticides and fertilizers, and are processed without artificial ingredients, preservatives, or irradiation. Organic products are usually more expensive than conventional products, but they are healthier for the environment, animals, and humans.
Organic product B is a four-carbon chain, propene, which can be drawn as CH3CH2CHCH3. The structural formulas for the two products can be drawn as follows:
A CH3CH2CHCHCH3
B CH3CH2CHCH3
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1. A chemist needs to prepare 4.00 L of a 0.50 M solution of potassium permanganate (KMnO4). What mass of KMnO4 does she need to make the solution?
2. Determine the molality of a solution prepared by dissolving 20 g of sodium chloride (NaCl) in 150. g of water. This problem is similar to Sample Problem 16.5.
She needs 128.375 g of kmno4 to make the solution.
Data:
2.5 L is the volume. 0.325 M for concentration Calculate the moles of KMnO4 for potassium permanganate (Molar mass): 39 + 55 + (16 x 4) = 158 g.
What separates molality from mole molarity?Its molarity is the ratio of a molecule in meters to every liters in a solution. The solution contains both the solute and the solvent. Mass of an object, on the other hand, is the ratios of both the molecules of a component to the grams of a solvent.
What is molarity, for instance?The mole of material per liter of water is measured as molarity. For instance, when table salt is dissolved in water, water serves as both the solution and the solute. Sodium chloride weights 58.44 grams per mole. 58.44 grams of sodium chloride dissolve for one liters of water to form a one molecule solution, or 1M.
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section 6.2 classifying the elements this section explains why you can infer the properties of an element based on the properties of other elements in the periodic table. it also describes the use of electron configurations to classify elements.
The atomic numbers of the elements are listed in the long form periodic table. The quantity of protons in the nucleus of an element's atom is represented by the element's atomic number.
What is an atomic number?An atomic nucleus' charge determines an element's atomic number, also known as nuclear charge number. This is equivalent to the number of protons in the nucleus of each atom of that element for conventional nuclei, or the proton number. To uniquely identify common chemical elements, one can use their atomic number. Chemical elements are grouped in the periodic system by increasing the amount of protons they contain, and each chemical element has a unique atomic number. As a result, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number. The number of protons that make up an atom's nucleus is known as the atomic number.To learn more about atomic number refer to:
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select the statement that accurately describes the hybridization states of the carbon atoms in cyclobutene
The cyclobutene's carbon atoms are all hybridized in the sp3 sp3 state, with the second and third carbon atoms also being in the sp state.
For each carbon atom in cyclohexane, what is the hybridization?Every carbon in cyclohexane is sp3 hybridized and tetrahedral, making it a saturated cyclic hydrocarbon (C6HI2).Sp2 hybridization happens to alkenes. One s orbital joins forces with two p orbitals to create three identical sp 2 hybrid orbitals in the process known as sp 2 hybridization.Three carbon atoms make up the chemical in question. First carbon undergoes sp3 sp3 hybridization, followed by sp hybridization on the second and sp hybridization on the third carbon atoms. There are so two different types of hybridization, namely sp3 sp 3 and sp.The cyclobutene's carbon atoms are all hybridized in the sp3 sp3 state, with the second and third carbon atoms also being in the sp state.To learn more about hybridization refer to:
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aluminum is the element that is best represented by the six successive ionization energies listed because
Because it only needs to lose one electron in order to create the next valence electron shell, the stable 3s shell.
What is an ionization energies?Ionization energy is the least amount of energy required to release the loosely bound electron from an isolated gaseous atom, positive ion, or molecule.Ionization energy is a measure of the difficulty of removing an electron from an atom or ion or the propensity of an atom or ion to give up an electron. Typically, when a chemical species is in its ground state, an electron is lost.The amount of energy required to remove an electron from an atom is referred to as ionization energy. As we move along a group, the ionization energy diminishes.One isolated, gaseous atom in the ground electronic state must absorb a certain amount of energy in order to discharge an electron and produce a cation. This energy is known as the ionization energy. The amount of energy required for each atom in a mole to lose one electron is measured in kJ/mole, or kJ/mol.To learn more about ionization energies refer to:
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This investigation is a controlled experiment, so you can change only one variable at a time. Decide whether you’ll change the amount of baking soda or the amount of vinegar. Give a reason for your choice.
Now decide how many different combinations of baking soda and vinegar you will try. The number of combinations must be three or more.
List the amounts of baking soda and vinegar that you will use in each combination. Remember, the amount of one of the two substances must be held constant.
Part D
Carry out the investigation you planned. Record your data in the table. In the observation column, record the amount of bubbles you see.
In the investigation, the amount of vinegar is held constant and the amount of baking soda can be varied. Both reacts together to form carbon dioxide gas that is appearing as bubbles.
What is dependent variable ?In a scientific investigation, there are two types of investigations namely, dependent variables and independent variables. Dependent variables are dependent on the independent variables which is changed.
The variable which we can change is the independent variable. In the given investigation, the independent variable is the amount of baking soda which we can change where, amount of vinegar is held constant.
The gas bubbles formed there is carbon dioxide. The amount of bubbles formed depends on the amount of baking soda.
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Chemistry final
HELP!!!!HELPP
The systematic name for CuSO4 is copper(II) sulfate, but it is also referred to as blue vitriol, Roman vitriol, the vitriol of copper, and bluestone.
Define CuSO4?
By heating copper sulphide ores to produce copper oxide which is then treated with sulphuric acid to form copper sulphate. By slow leaching in air of piles of low grade ore. Bacterial action is sometimes employed to hasten the process. A solution of copper sulphate drains away from such heaps.The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CuSO4, or 159.6086 grams.When Copper sulfate is heated strongly, it changes into white colored anhydrous copper sulphate and when water is added again to it then it is again changed to blue color copper sulphate. It is a reversible chemical change.To learn more about copper refers to:
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contrast the earliest scientist's understanding of the atom with that of the most recent in your list
Our current understanding of the atom is based on Dalton's early 19th-century idea of atomism, which was developed through meteorological investigations. John Dalton is well recognised for developing the atomism hypothesis.
When British chemist John Dalton realised that compounds usually had whole number ratios of atoms, he provided the first modern proof for the existence of atoms. Because of this, it's H2O rather than H20. A novel state of matter has been demonstrated by scientists: an electron circles a nucleus at a considerable distance while being bonded to several other atoms inside the orbit. The Bose-Einstein condensate's electron (blue) orbits the nucleus (red), and the orbit encompasses a large number of other atoms (green). Chemistry's fundamental building component is an atom. It is the lowest fraction of substance into which electrically charged particles cannot be released.
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When tin is mixed with chlorine a synthesis reaction occurs. What are the products of this reaction?
Sn + 2Cl2 -> ?
When tin is mixed with chlorine, a synthesis reaction occurs and the product of this reaction is SnCl₄ which is denoted as option C.
What is a Synthesis reaction?This is referred to as a reaction that occur when two different atoms or molecules interact to form a different molecule or compound under certain conditions.
In this scenario, we were told that the reactants are tin and chlorine and we can deduce that they react to form tin (IV) chloride which is denoted as SnCl₄ and the equation of the reaction can be seen below thereby making it the correct choice.
Sn + 2Cl₂ -> SnCl₄
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the reactants of two chemical equations are listed.equation 1: cuso4 and naohequation 2: fe and cuso4based on the type of reaction, which reaction can be used to extract copper metal fro
The reaction that can be used to extract copper metal from copper sulfate solution would be equation 2.
Iron molecules will displace copper from CuSO4 because it is more reactive than it. This shows that Iron is more reactive than Copper and comes above Cu in the reactivity series.
Even though Sodium will displace Copper from CuSO4, equation 1 will result in the formation of Cu(OH)2 instead of free copper because it is a double displacement reaction.
A double-displacement reaction takes place when the positive and negative ions of two ionic compounds exchange positions to create two completely different compounds in a liquid solution. These substances can be precipitates, gases, or other molecular substances.
Reactivity series is a list of elements that are arranged in such an order that shows the elements from being most reactive to least reactive.
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The complete question is-
The reactants of two chemical equations are listed.
Equation 1: CuSO4 and NaOH
Equation 2: Fe and CuSO4
Based on the type of reaction, which reaction can be used to extract copper metal from copper sulfate solution?
A - Equation 2, because Fe being more reactive, replaces Cu from CuSO4
B - Equation 2, because Fe being more reactive, replaces S from CuSO4
C - Equation 1, because Na being more reactive, exchanges position with Cu in CuSO4
D - Equation 1, because Na being more reactive, exchanges position with S in CuSO4
which of the following solutes would move the fastest? which of the following solutes would move the fastest? O albumin O urea O glucose O sodium chloride
The speed at which a solute will move through a solution is determined by its diffusion rate. Diffusion is the movement of molecules or ions from an area of high concentration to an area of low concentration.
The diffusion rate of a solute is directly proportional to its concentration gradient, and inversely proportional to its size and charge.In the given options, O albumin, O urea, O glucose and O sodium chloride, Sodium chloride (NaCl) would move the fastest because it is an ionic compound, which means it has a charge and thus it is smaller in size than the other options which are organic molecules, thus it can diffuse faster through the solution.O albumin and O urea are large organic molecules and have a low diffusion rate. O glucose is a smaller molecule but still larger than NaCl and its diffusion rate would be slower than NaCl
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125 ml of 0.150 m agno3 are mixed with 95.0 ml of 0.212 m k2cro4. assuming a complete reaction, calculate the mass of the precipitate. note: chromates are generally insolub
When 125 ml of 0.150 M AgNO₃ are mixed with 95.0 ml of 0.212 M K₂CrO₄, assuming a complete reaction, the mass of the precipitate Ag₂CrO₄ is 0.827 grams.
The reaction between AgNO3 and K2CrO4 is:
Ag₂CrO₄(aq) + K₂CrO₄(aq) ->Ag₂CrO₄(s) + 2KNO₃(aq)
In order to calculate the mass of the precipitate, Ag₂CrO₄, we need to use the stoichiometry of the reaction and the concentrations of the reactants.
The balanced equation tells us that 1 mole of AgNO₃ reacts with 1 mole of K₂CrO₄ to produce 1 mole of Ag₂CrO₄ precipitate.
We can use the volumes and concentrations of the solutions to calculate the number of moles of each reactant:
0.125 L of 0.150 M AgNO₃ = 0.0188 moles AgNO₃
0.095 L of 0.212 M K₂CrO₄ = 0.0199 moles K₂CrO₄
Since the reaction is stoichiometric, we can assume that the number of moles of AgNO₃ and K₂CrO₄ is equal, therefore the number of moles of Ag₂CrO₄ precipitate is also 0.0188 moles.
We can use the molar mass of Ag₂CrO₄ (441.98 g/mol) to convert the number of moles to mass
0.0188 moles Ag₂CrO₄ x 441.98 g/mol = 0.827 g Ag2CrO4
In conclusion, when 125 ml of 0.150 M AgNO₃ are mixed with 95.0 ml of 0.212 M K₂CrO₄, assuming a complete reaction, the mass of the precipitate Ag₂CrO₄ is 0.827 grams. This is calculated by using the stoichiometry of the reaction, the concentrations of the reactants, and the molar mass of Ag₂CrO₄.
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Complete the following statements regarding the naming of the oxoanions containing chlorine.
a. ClO^- is the hypochlorite ion
b. ClO2- is the chlorite ion
c. ClO3- is the chlorate ion
d. ClO4- is the perchlorate ion
the following statements regarding the naming of the oxoanions containing chlorine.
a. ClO^- is the hypochlorite ion True
b. ClO2- is the chlorite ion-True
c. ClO3- is the chlorate ion-True
d. ClO4- is the perchlorate ion-True
An ion is an atom or molecule that has an unequal number of protons and electrons, giving it a net electrical charge. Ions can be positively charged (called cations) or negatively charged (called anions).The hypochlorite ion (ClO^-) is a negatively charged ion that contains one chlorine atom and one oxygen atom. It is formed when chlorine gas dissolves in water or when electrolysis is applied to saltwater. Hypochlorite ions can act as oxidizing agents and are used in various cleaning and disinfecting products.The chlorite ion (ClO2^-) is a negatively charged ion that contains one chlorine atom and two oxygen atoms. It is formed by the oxidation of chlorine dioxide and it is an intermediate product during the bleach production. Chlorite ions are also used as a sanitizing agent and water treatment.
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List what ions you expect to find for each of the following electrolytes. Include the correct charges and the correct number of each ion You will need to recognize monatomic and polyatomic jous they are present; refer to the tables in your textbook: (For example; NaCl dissociates into Na and CF CaFz b) NHCI Na;PO: 3) Each ionic compound above dissociates into ions. How many total ions result from each compound, assuming complete dissociation? (For example, NaC] dissociates into two ions CaFz b) NHCI Na;PO:
An ion is an electrically charged particle that is created by either taking electrons from a neutral atom to create a positive ion or adding electrons to a neutral atom to create a negative ion.
The ions of the subsequent electrolytes Include the right charges and the appropriate number of each ion, which are as follows: (a) CaF2 dissociated into 3 ions, one Ca++ and two F - (b) NH4Cl dissociated into 2 ions, one NH4+ and one Cl- (c) Na3PO4 dissociated into 4 ions, three Na+ and one (PO4)—
Ions are atoms or molecules with a net electrical charge (/a. n, -n/). Conventionally, a proton's charge is thought to be positive, while an electron's charge is thought to be negative, making them equal and opposing charges.
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Step 1:H2(g)+ICl(g)→HI(g)+HCl(g)(slow)Step 2:HI(g)+ICl(g)→HCl(g)+I2(g)(fast)
The rate of reaction in a chemical reaction is the speed at which the products are formed from the reactants. It offers some insight into the potential reaction time.
For instance, the combustion of cellulose in fire responds incredibly quickly and is complete in a split second.
H2(g)+2ICl(g) → 2HCl(g)+I2(g)
Rate of reaction = reactant used/Time taken to consume of the reactant
rate=k[HI][ICl]
The rate of reaction, also known as reaction rate, is the rate at which reactants transform into products. It should go without saying that different chemical reactions occur at different rates. While some chemical reactions happen extremely immediately, others may take some time to reach their final equilibrium.
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complete question: Step 1:H2(g)+ICl(g)→HI(g)+HCl(g)(slow). Step 2 : HI(g)+ICl(g)→HCl(g)+I2(g)(fast). The reaction is carried out at constant temperature inside a rigid container. Based on this mechanism, which of the following is the most likely reason for the different rates of step 1 and step 2 ?
Calculate the energy required to heat 419.0 mg of iron from 1.2 degree C to 15.1 degree C. Assume the specific heat capacity of iron under these conditions is 0.449 J middot g^-1 middot K^-1. Be sure your answer has the correct number of significant digits.
The energy required to heat 419.0mg of iron from 1.2 degree C to 15.1 degree C is 2.625 J. This is calculated from the expression of Specific heat capacity.
Heat capacity is a characteristic of an object that explains the amount of heat required to change its temperature by one degree. Heat Capacity has the units of energy per degree. Specific Heat Capacity is the amount of heat required to change the temperature of a mass unit of a substance by one degree. Specific heat is a common term for the specific heat capacity.
Q = m*c*dT
This is the equation for specific heat capacity. here, m is the mass of the sample, c is the specific heat, and ΔT is the temperature change.
Putting all the values we get,
m = 419 mg = 0.419 g of Iron
dT = 15.1 -1.2 = 13.9 °C
Q = 0.419*0.449*13.9 = 2.615 J
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Penalty for an incorrect guess is equal to the credit for a correct response. In the event of a property fire in the Chemistry Teaching Labs (not involving any person or clothing), what should a lab student do to respond?
a lab student do to response should be, If doing so does not cause a delay in the evacuation, leave the room while removing your personal things. Observe the TA's and the lab staff's instructions.
Notify the emergency personnel of any other residents who require help leaving. Close the doors, leave the area, and dial 9-1-1 from a secure location. student can do the experiments they have learnt about in textbooks or from their professors in a scientific lab. They have a better understanding of an experiment's methodology and potential outcomes in this way. a location outfitted for scientific experimentation or for testing and analysis. a research centre. A location that allows for experimentation, observation, or practise in a particular field of study. The abbreviation lab comes from the mediaeval Latin word laboratorium.
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Which of the following best describes the expected product of the reaction H3O+below? A) An epoxide B) A secondary alcohol C) A primary alcohol D) A tertiary alcohol
The expected product of the reaction H3O+ is: C) A primary alcohol
H3O+ is a protonated water molecule, also known as a hydronium ion. When an alcohol molecule is treated with H3O+, it can undergo an acid-catalyzed reaction called an "alcohol dehydration" which results in the removal of a molecule of water and the formation of an alkene. The H3O+ acts as an acid, donating a proton (H+) to the alcohol molecule, which results in the formation of an alkyloxonium ion intermediate. This intermediate then loses a molecule of water to form an alkene.The product of the reaction is affected by the type of alcohol that is present in the reaction. In the case of a primary alcohol, it will lose water to form an alkene and a primary alcohol will lose water to form an alkene with one less carbon atom than the alcohol. A secondary alcohol and a tertiary alcohol will lose water differently and will not form an alkene, instead, they will form a carbocation intermediate which is not a stable species and will react further with other reagents to form other products.An epoxide is a cyclic ether and it is not formed from the reaction of an alcohol with H3O+.
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explain why an intersitial alloy would not form a stable crystal sctructer if the component atoms were of similar size. sketch a diagream to illustrate your answer
Naming of the following compound is given below.
What is chemical compound?
A chemical compound is a substance composed of two or more elements in a fixed ratio. Chemical compounds can be formed when atoms of two or more elements combine chemically. Examples of chemical compounds include water (H2O), table salt (NaCl), and carbon dioxide (CO2). Compounds are usually identified by their chemical formula, which describes the ratio of atoms present.
2,5-Dibromobenzene: A compound composed of six carbon atoms arranged in a ring structure, with two bromine atoms bonded to the two carbon atoms in the center of the ring.
3,6-Dibromobenzene: A compound composed of six carbon atoms arranged in a ring structure, with two bromine atoms bonded to the two carbon atoms at either end of the ring.
1,4-Dibromobenzene: A compound composed of six carbon atoms arranged in a ring structure, with two bromine atoms bonded to the two carbon atoms located adjacent to each other in the center of the ring.
2,5-Dibromocyclohexene: A compound composed of six carbon atoms arranged in a ring structure, with two bromine atoms bonded to the two carbon atoms located across from each other in the middle of the ring.
1,4-Bromocyclohexene: A compound composed of six carbon atoms arranged in a ring structure, with one bromine atom bonded to the two carbon atoms located adjacent to each other in the center of the ring.
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Methane (CH4), the gas used for Bunsen burners, doesn't react with oxygen in the air until a striker/flame is brought near to the Bunsen burner. a) Explain the role of the striker/flame. b) What is the energy used for in the reaction?
The combustion of methane is an illustration of a simpler chemical transformation. Natural gas, the primary fuel used in many residential furnaces, is primarily composed of methane.
Before the gas is burned, why is air combined with it in the burner's barrel? A flame that is too brightly yellow and smokey will result from insufficient air, whereas a pleasant blue flame will result from the combination of air and gas.The combustion of methane is an illustration of a simpler chemical transformation. Natural gas, the primary fuel used in many residential furnaces, is primarily composed of methane. The gases carbon dioxide and water vapor are created when methane burns when it reacts with oxygen in the air to form completely new chemical compounds.A gas adjustment screw should be used to vary the flame's height.To learn more about chemical transformation refer to:
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an neutral atom has 42 protons and 56 neutrons. use this information to answer the following questions.
A neutral atom has 42 protons and 56 neutrons mean it has no charge. The atom is Molybdenum (Mo) with atomic no. 42. And mass no. 98 in period 5 and group 6 of the periodic table.
Let us first understand the question. So the general representation of an atom that is equal to AZ X, where X is the atomic symbol of the element, A is the mass number and Z is the atomic number. Since we know that the number of protons is equal to the no. of electrons which is equal to the atomic number. Also, we know that Mass no. is equal to the sum of Protons and Neutrons. This allows, us to find the atom in the periodic table with atomic no. 42 and mass no. 98 which is Molybdenum in period 5 and group 6 of the table.
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The electron cloud of HF is smaller than that of F2 , however, HF has a much higher boiling point than F2 has. Which of the following explains how the dispersion-force model of intermolecular attraction does not account for the unusually high boiling point of HF?
Option (d) is correct. Liquid F2 has weak dispersion force attractions between its molecules whereas liquid HF has both weak dispersion force attractions and hydrogen bonding interactions between its molecules.
Dispersion forces are the temporary attraction between two adjacent atoms. Electrons are unsymmetrical which creates a temporary dipole. This dipole causes an induced dipole in the other atom which leads to the attraction between the two. The high boiling point of HF is not attributable to the dispersion forces. In HF, a stronger attraction present is hydrogen bonding. The strength of dispersion forces is proportional to the polarizability of the molecule. The more polarized the stronger is the forces.
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The complete question is:
The electron cloud of HF is smaller than that of F2, however, HF has a much higher boiling point than F2 has. Which of the following explains how the dispersion-force model of intermolecular attraction does not account for the unusually high boiling point of HF?
A. F2 is soluble in water, whereas HF is insoluble in water.
B. The F2 molecule has a greater mass than the HF molecule has.
C. Liquid F2 has weak dispersion force attractions between its molecules, whereas liquid HF has strong ionic interactions between H+ and F- ions.
D. Liquid F2 has weak dispersion force attractions between its molecules, whereas liquid HF has both weak dispersion force attractions and hydrogen bonding interactions between its molecules.
ether groups are formed when alcohols are treated with acid. consider the following two questions that focus on acid-catalyzed ether formation using alcohol functional groups.
The alkyl groups in secondary and tertiary alcohols make the nucleophilic assault challenging and provide a steric hindrance. Therefore, elimination to produce an alkene is preferred to substitution to produce an ether.
Therefore, acid dehydration of secondary or tertiary alcohols is an inappropriate approach for producing ethers. Acid dehydration results in the formation of ethers via the SN2 pathway (from primary alcohols). Due to steric hindrance, alkenes rather than ethers develop when secondary or tertiary alcohols are utilized. One alcohol is protonated in the first stage of the reaction process to provide a strong leaving group. In the subsequent step, a second alcohol undergoes an SN2 reaction with the protonated alcohol to remove water, resulting in a protonated ether. This intermediate is deprotonated to produce in the final step.
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A particular unknown solid depresses the freezing point of stearic acid (Kf =4.5 °C/molal) by 3.5 C. If you dissolve the same solid in H2O (Kf = 1.86 C/molal) to the same final molality as you had it in the stearic acid, what would the change in freezing point be?
The freezing point depression of a solution is directly proportional to the molality of the solute. The freezing point depression of a solution is given by the equation ΔTf = Kf * molality, where ΔTf is the change in freezing point, Kf is the freezing point depression constant of the solvent and molality is the concentration of the solute.
We know that the solid depressed the freezing point of stearic acid (Kf =4.5 °C/molal) by 3.5 °C, and that the same solid was dissolved in water (Kf = 1.86 C/molal) to the same final molality as it had in the stearic acid.
Thus, we can say that the final molality of the solid = 3.5 / 4.5 = 0.777 mol/kg
Now we need to find the freezing point depression for the same solution in water, so we use the freezing point depression constant of water (Kf = 1.86 C/molal) and the final molality of the solid in water
ΔTf = Kf * molality
ΔTf = 1.86 * 0.777 = 1.44 C
So the change in freezing point would be 1.44 C.
Question 8 1 pts Indicated whether each of the following is either a chemical or physical change/property. The melting point of water is 0°C. physical When an aqueous solution with a pH less than 7 is added to sodium bicarbonate, bubbling occurs. chemical Cooking an egg. chemical The lowering of vapor pressure after salt is added to a liquid. physical Combination of yellow and blue paint to create a green paint. physical Formation of solid after reagent combination. chemical Crystal formation upon solution formation.
The addition of an aqueous solution with a pH less than 7 to sodium bicarbonate causes bubbling is chemical change. I'm frying an egg is chemical. The reduction in vapor pressure caused by the addition of salt to a liquid is physical change.
Combination of yellow and blue paint to create a green paint is chemical. Formation of solid after reagent combination is chemical. Crystal formation upon solution formation is physical. Melting point is a physical property, as it refers to the temperature at which a substance changes from a solid to a liquid state. The addition of an aqueous solution with a pH less than 7 to sodium bicarbonate causes bubbling.. This is a chemical change as a new substance is formed (carbon dioxide gas) and the bubbling is due to the release of CO2 gas.Cooking an egg. This is a chemical change as the proteins in the egg change structure and form new compounds The lowering of vapor pressure after salt is added to a liquid, this is a physical change because it is a change in the physical properties of the liquid. Combination of yellow and blue paint to create a green paint is a chemical change.
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