The property of base is soapy to touch. It is good conductors of electricity. It also liberates heat on dilution. So, all the given statements are correct.
We can identify physical as well as chemical properties of bases. Physical properties are those that can be identified by our sense organs. We can touch, see, smell, or feel these physical properties and identify them. The physical properties of bases are: they are bitter in taste; they are soapy or slippery to touch; and they turn red litmus blue.
Meanwhile, the chemical properties of the bases are: they react with acids to form salt and water; they react with metal and liberate hydrogen gas; some conduct electricity but only in aqueous state; they are not very good conductors in solid state; they produce hydroxide ions in solution; and they liberate ions and heat on dilution.
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suppose naoh is added to the following system when it is at equilibrium. nh3(aq) h2o(l) nh4 (aq) oh- (aq) a. in which direction will the reaction shift after the naoh is added? b. will this stress increase or decrease the value of the reaction quotient, q? justify your answer. c. will the rate of the forward reaction exceed the rate of the reverse reaction before equilibrium is re-established? justify your answer. d. when equilibrium is re-established will the rate of the forward reaction exceed the rate of the reverse reaction? justify your answer.
It will raise the concentration of OH- (aq), which will cause equilibrium to move in the other direction, causing the concentration of OH- (aq) to fall in order to restore balance.
Describe equilibrium and provide a sample :The Latin term libra, which signifies weight or balance, is where the word equilibrium first appeared. Equilibrium can be visualized as an interesting story that is currently in rest. a vehicle that is going steadily. a chemical process where both the forward and backward rates of reaction are equal.
[tex]NH3(aq) + H2O (l) < === > NH4+ (aq) + OH- (aq)[/tex]
NaOH is added to system [tex]: NaOH (aq) === > Na+ (aq) + OH- (aq)[/tex]
(i) It will raise the concentration of OH- (aq), causing equilibrium to shift in a way that lowers the conc of OH- (aq) to attain equilibrium again: thus equilibrium will shift towards reactants (Left) .
(ii) Q[tex]= [OH-] [NH4+]/ [NH3] [H2O][/tex]
with increase in concentration of OH- (aq) (stress) ,value of Q will increase, since OH- appear in numerator .
(iii) Before equilibrium is re-established, rate of reverse reaction will exceed forward reaction, not vice-versa. As conc. of OH-(aq)decreases in towards reactants.
(iv) When equilibrium is re-established, rate of reverse reaction will be equal to rate of forward reaction, to maintain equilibrium.
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why can moles of reactantws or products be used rather than their concentrations in the equilibirum constant expression
The equilibrium constants remain unchanged while the concentration changes. The equilibrium constants are unaffected by changes in the concentrations of the substances in the equilibrium. Only a change in temperature may modify an equilibrium constant. The equilibrium point will alter if the amount of one component in the mixture varies.
Le Chatelier's Principle states that the point of equilibrium shifts in a way that tends to reverse the change you have made. Assume that four substances—A, B, C, and D—have reached equilibrium.
A+2B⇌C+D
Le Chatelier's Principle states that if you lower the concentration of C, for instance, the equilibrium position will shift to the right to raise the concentration once more.
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can both liquid and gas exist at point b of thecooling curve to the right? 9.which point represents condensation? 10.at what temperature does this substancefreeze? 11.which process requires more energy to bereleased, condensation or freezing? explain.
BC point in cooling curve represents condensation until the bubble temperature is reached at C.
How can the freezing point of a cooling curve be determined?Drawing two straight lines connecting the data points above and below the freezing point allows one to infer the solution's freezing point from the graph. The freezing point of the solution is the temperature that corresponds to the point where the two lines converge.
Why does freezing use less energy than condensation?The transition from a solid to a liquid requires much less energy than the reverse. This is a result of the significant particle separation in the gaseous state. The magnitude of the intermolecular forces influences the values of the temperatures of fusion and vaporisation.
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the half-life of a reaction of compound a to give compounds d and e is 8.50 min when the initial concentration of a is 0.150 m. how long will it take for the concentration to drop to 0.0300 m if the reaction is (a) first order with respect to a or (b) second order with respect to a?
It will take 20.33 min in the first order for the concentration to drop to 0.0300 M and 11.8 min for the concentration to drop to 0.0300 M in the second order.
What is compound?A substance created by chemically joining two or more different elements. Examples of compounds are table salt (NaCl), which is made from the elements sodium and chloride, and water (H2O), which is created from the elements hydrogen and oxygen.
(a) First order with respect to A:
The half-life of a first-order reaction is constant and does not depend on the initial concentration of the reactant. Therefore, we can use the half-life formula:
t1/2 = 0.693/k, where k is the rate constant of the reaction.
We are given that the half-life of the reaction is 8.50 min when the initial concentration of A is 0.150 M.
Since we know the half-life of the reaction, we can find the rate constant, k = 0.693/8.50 = 0.081 min^-1
To find how long it takes for the concentration of A to drop to 0.0300 M, we can use the formula:
[A]t = [A]0 * e^(-kt)
where [A]t is the concentration of A at time t, [A]0 is the initial concentration of A, k is the rate constant, and t is the time in minutes.
Plugging in the given values and solving for t, we get:
t = (ln (0.0300/0.150)) / (-0.081) = 20.33 min
For (b) Second order with respect to A:
The half-life of a second-order reaction is dependent on the initial concentration of the reactant.
t1/2 = 1/(k[A]) = 8.50 min
By solving for k, we can find k = 1/(8.5*0.15) = 0.0118 min^-1M^-1
To find how long it takes for the concentration of A to drop to 0.0300 M, we can use the formula:
1/[A]t = 1/[A]0 + kt
Plugging in the given values and solving for t, we get:
t = (1/0.0300 - 1/0.150) / 0.0118 = 11.8 min
Therefore, if the reaction is first order with respect to A it will take 20.33 min for the concentration to drop to 0.0300 M, and if the reaction is second order with respect to A it will take 11.8 min for the concentration to drop to 0.0300 M.
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When menthyl chloride is treated with a strong base, only one elimination product is observed. yet, when neomenthyl chloride is treated with a strong base, two elimination products are observed.
draw the expected products for the reaction between menthyl chloride and a strong base.
draw the expected products for the reaction between neomenthyl chloride and a strong base.
The reaction between menthyl chloride and a strong base results in a single elimination product, 2-methylpropene, and a chloride ion.
What is reaction?Reaction is the process of responding to an event, action, or stimulus. It can be physical, emotional, mental, or a combination of all three.
Menthyl Chloride + Strong Base -->
Product 1: 2-Methylpropene + Chloride Ion
The reaction between menthyl chloride and a strong base results in a single elimination product, 2-methylpropene, and a chloride ion. This occurs because menthyl chloride has an allylic hydrogen, which can be abstracted by the strong base. This results in the formation of a carbocation intermediate, which then undergoes an E2 elimination reaction to form the desired product, 2-methylpropene.
Neomenthyl Chloride + Strong Base -->
Product 1: 2-Methylpropene + Chloride Ion
Product 2: 3-Methylpropene + Chloride Ion
The reaction between neomenthyl chloride and a strong base results in two elimination products, 2-methylpropene and 3-methylpropene, and a chloride ion. This occurs because neomenthyl chloride has two allylic hydrogens, which can be abstracted by the strong base. This results in the formation of two carbocation intermediates, which then undergo E2 elimination reactions to form the desired products, 2-methylpropene and 3-methylpropene.
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2. a solution has a ph 9.2. a. is this solution acidic, basic, or neutral? b. what is the concentration of the hydronium ion, [h3o ]?
The concentration of the hydronium ion, [H3O+], is low and is equal to 10^-9.2.
What is concentration?Concentration is the ability to focus one's attention on a particular task or thought without being distracted by other things. It is the act of deliberately focusing on one thing at a time and is essential for many tasks such as studying, problem-solving, and decision-making. Concentration requires practice and can be developed by engaging in activities such as mindfulness, breathing exercises, and other relaxation techniques.
a. This solution is basic.
b. The concentration of the hydronium ion, [H3O+], is low and is equal to 10^-9.2. This is because the pH of a solution is equal to -log[H3O+]. Therefore, a pH of 9.2 indicates that the [H3O+] is equal to 10^-9.2.
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What reagent (or compound) causes the observed visual change in a positive Lucas test? A. Cr(VI) is reduced to Cr(ll) B. The alkyl halide product is insoluble in water C. The product hydrazone is insoluble. D. Ag() is reduced to Ag(0)
The alkyl halide product is insoluble in water causes the observed visual change in a positive Lucas test.
What is Lucas test?The Lucas test uses a solution of anhydrous zinc chloride in concentrated hydrochloric acid to distinguish and classify primary, secondary, and tertiary alcohols. The Lucas reagent is the name given to this mixture in most cases. A positive Lucas test results in the observed visual change because the alkyl halide product is insoluble in water. Put a tiny amount of the sample you need to analyze in a test tube. Add 2 to 3 ml of Lucas reagent to the unknown sample. After thoroughly blending, allow the solution to sit. Note the amount of time spent and note whether there is turbidity (cloudiness) present or not.
Here,
A positive Lucas test results in the observed visual change because the alkyl halide product is insoluble in water.
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Which one of the following processes produces a decrease in the entropy of the system?
A) freezing Fe(l) into Fe(s)
B) evaporation of liquid ethanol into gaseous ethanol
C) dissolution of LiOH(s) in water
D) melting ice to form water
E) mixing of two gases into one container
I know the answer is A but I need a detailed answer as to why that is the answer
The answer is A produces a decrease in the entropy of the system
A) we know that entropy is the measure of randomness. if randomness increases entropy also increases.
entropy order of substances : solid < liquid < gas
here conversion of liquid to solid means randomness decreases . so that entropy decreases
B) [tex]liquid \rightarrow gas\: conversion[/tex] . so entropy is increases
C) dissolution of LiOH. that means LiOH molecules distributed more randomly in the solution so more disorder and more entropy
D) ice melting means : solid to liquid so entropy also increases
E) gas mixing means more disturbed in the gases more disturb will leads to more randomness and more entropy
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if 250 ml of a 4.5 m stock solution of sulfuric acid is transferred to an empty flask, what volume of water in liters must be added to the flask to reduce the solution's molarity to 2.2 m?
This dilution issue makes use of the equation. MaVa=MbVb. The initial volumes are Va = 15.00 mL and Ma = 6.77M, respectively (concentration).
Describe what diluting is.This act of "adding extra additional solvent to a solution, including such water, to the solution, to decrease the amount of the solute in a solution," is known as dilution. A solution must be diluted by adding more solvent without introducing more solute.
What different types of dilution exist?Serial dilution is a frequent technique for attaining this concentration reduction. In homeopathy, diluting. Using the dilution equation, determine the rate of dilution of a gas. The use of a mark beyond its designated market without authorization is known as trademark dilution.
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larity if 11 g cacl2 are dissolved in one liter of solution? ... of all ions present in .0200 mole of sodium phosphate in 10.0 ml of solution?
The molarity of 11 g of CaCl2 dissolved in one liter of solution is 0.20 M. The molarity of 0.0200 mole of sodium phosphate in 10.0 ml of solution is 2.00 M.
What is molarity?A measurement of a solution's concentration is its molarity. The concentration of a solution can be determined by measuring the mass of the solute and the volume of the solution. Molarity is a useful measure when trying to understand how much of a solute is present in a given volume of solution. It can be used to compare the strength of different solutions, and also to calculate how much solute is required for a given volume. Molarity is an important concept in chemistry and is used in many areas of science.
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if a molecule with an empirical formula of ch has a molar mass of 39, what is the molecular formula?
The molecular formula would be [tex]C_{3} H_{3}[/tex]. An empirical formula is a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number or arrangement of atoms.
Empirical formulas reveal the simplest or most reduced ratio of components in a compound, while chemical formulas reveal how many atoms of each element are present in a complex. The empirical formula and the chemical formula of a substance are identical if the chemical formula can no longer be lowered.
Formula for a molecule: (Empirical formula)* n
Thus, a whole number multiple of the empirical formula mass must be the molecular mass.
Here, 39 = 3* (12+1) is evident.
so Molecular Formula = [tex]C_{3} H_{3}[/tex]
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Draw the structure of the product of the reaction between the compound shown below and H2SO4 CH3SCH3 . You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. If the reaction involves proton transfer, draw the products in separate sketchers. If the reaction is a Lewis acid-base reaction, draw the product in one sketcher only
Thioether (CH3SCH3) acts as Lewis base and BF3 acts as Lewis acid.
Which definition of an acid is the best?Any hydrogen-containing material that has the ability to donate a proton (hydrogen ion) to another chemical is considered an acid. A base is a molecule or ion that can take up an acid's hydrogen ion. Typically, sour tastes help to identify acidic chemicals.
Why do people have acids in their bodies?Acidity happens when the kidneys are unable to eliminate an excess of acid produced by the gastric glands in the stomach. It frequently occurs with indigestion, reflux, and heartburn. Acidity is typically brought on by eating too spicy food, drinking coffee, eating too much, and eating a low-fiber diet.
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consider the reversible reaction: c2o2(g) <------> 2co(g) at equilibrium, the concentration of c2o2 is 1.50 m and that of co is 1.10 m. what is the value of the equilibrium constant, keq?
The value of the equilibrium constant, keq is calculates as 0.807.
What is meant by reversible reaction?Reaction in which the conversion of reactants to products and conversion of products to reactants occur simultaneously is called reversible reaction. One example of reversible reaction is : reaction of hydrogen gas and iodine vapor to form hydrogen iodide.
Reversible reactions reaches an equilibrium point where the concentrations of reactants and products will no longer change. In reversible reaction, both forward and reverse directions of reaction occurs at the same time.
Given, c2o2(g) <------> 2co(g) ; concentration of c2o2 is 1.50 m and
concentration of co is 1.10 m.
As, Keq= K(CO)²/K( C₂O₂)
= 1.1²/1.5
Keq =0.807.
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Draw the product formed when the compound shown below undergoes a reaction with Br2 in CH2Cl2
The overall equation for this reaction is: 2-Chloro-3,3-dimethylpentane + Br2 → 2-Bromo-3,3-dimethylpentane.
What is reaction?A reaction is a type of response that occurs when two or more substances interact with each other.
The compound shown below is 2-chloro-3,3-dimethylpentane.
When 2-chloro-3,3-dimethylpentane reacts with Br2 in CH2Cl2, a substitution reaction takes place. The chlorine atom on the carbon atom of the compound is replaced with a bromine atom, and the product formed is 2-bromo-3,3-dimethylpentane. The mechanism of this reaction is shown below.
Step 1: Br2 attacks the carbon atom of the alkane and breaks the C-Cl bond.
Step 2: A bromonium ion is formed which leaves the bromine atom on the carbon atom of the alkane.
Step 3: The bromonium ion is attacked by another molecule of Br2 and a new C-Br bond is formed.
The overall equation for this reaction is: 2-Chloro-3,3-dimethylpentane + Br2 → 2-Bromo-3,3-dimethylpentane
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1). For which structure(s) does the electron-bearing carbon atom have a formal charge of zero?methylene onlyethyl only bothneither
The electron-bearing carbon atom in both methylene (-CH2-) and ethyl (-C2H5) structures has a formal charge of zero.
The formal charge is a method used to predict the electron distribution in atoms of a molecule, which can be calculated by subtracting the number of valence electrons of the free atom from the number of electrons assigned to the atom in the Lewis structure.In the case of methylene, which is a fragment of a hydrocarbon with the chemical formula -CH2- has 2 valence electrons, it shares one electron with each of the two hydrogen atoms, so the carbon atom has a formal charge of zero. In the case of ethyl, which is a fragment of a hydrocarbon with the chemical formula -C2H5, it has 5 valence electrons, it shares one electron with each of the five hydrogen atoms, so the carbon atom has a formal charge of zero.The electron-bearing carbon atoms in both methylene and ethyl have a formal charge of zero because they have a complete octet of valence electrons, which indicates a stable electronic configuration.
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the ocean stores carbon from its interactions with the atmosphere, so the ocean serves as (a) for the carbon cycle.(1 point) responses carbon sink carbon sink carbon dioxide carbon dioxide carbon flux carbon flux carbon source
The ocean stores carbon out of its interactions with atmosphere, therefore the ocean serves even though carbon sink for the carbon cycle.
What uses does carbon serve?Metal melting makes use of impurity carbon in the forms of coke derived from coal and charcoal generated from wood. It is crucial for the steel and iron industries in particularly. Graphite is utilized in furnaces liners, electric motor brushes, and pencils. Activated charcoal is employed in filtering and purification processes.
Do people require carbon?Without carbon, life on earth wouldn't be conceivable. This is partly because carbon can easily make bonds to other atoms, allowing biomolecules like RNA and DNA which are crucial for life, to have a variety of shapes and functions.
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What maximum amount of ammonia in grams can be synthesized from 25.2 g
of N2
and 8.42 g
of H2
?
The maximum amount of ammonia in grams can be synthesized from 25.2 g of N230.7 g NH₃.
What ammonia is used for?How is ammonia used? About 80% of the ammonia produced by industry is used in agriculture as fertilizer. Ammonia is also used as a refrigerant gas, for purification of water supplies, and in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals.
What is ammonia smell like?Ammonia (NH3) is a colorless gas that is a compound of nitrogen and hydrogen. It has a strong odor that smells like urine or sweat. Ammonia occurs naturally in water, soil, and the air, and is also found naturally in plants, animals, and the human body.
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For the atoms that do not follow the octet rule state how many electrons surround these atoms.Express your answers as integers separated by commas.NNO, NBF3, NICl2?, NOPBr3, NXeF4 =
For the atoms that do not follow the octet rule state electrons surround these atoms are 2,6,4,4,8.
The octet rule states that atoms tend to have 8 electrons in their valence shell in order to achieve a stable electron configuration. However, some atoms deviate from this rule:
NNO: Nitrogen monoxide, also known as nitric oxide, has only 2 electrons in its outermost shell.
NBF3: Boron trifluoride has only 6 electrons in its outermost shell.
NICl2: Nitrogen dichloride has only 4 electrons in its outermost shell.
NOPBr3: Nitrogen tribromide has only 4 electrons in its outermost shell.
NXeF4: Xenon tetrafluoride has only 8 electrons in its outermost shell.So the answer would be 2, 6, 4, 4, 8 respectively.
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The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is a. 13.1 g b. 13.0 g
c. 13.071 g
d. 13 g e. 10 g
The answer to the addition problem is Amphiprotic 13g. able to react as a base and an acid because it can both donate and take a proton.
When does amphoteric differ from amphiprotic?Amphoteric species are capable of acting as an acid and a base. Amphiprotic species may donate and receive protons, making them both a base and an acid in the Brnsted-Lowry equation.
How does something become amphiprotic?A substance is referred to as amphiprotic in chemistry & physical sciences if it has the ability to donate and absorb protons, acting accordingly as either a base or an acid (according to the Brnsted-Lowry theory for acids and bases, acids are proton donors & bases are proton acceptors).
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which of the following is an example of synthesizing information? (required)making connections between the history of housing policies and current housing trends.applying knowledge of basic chemistry from an introductory course towards understanding information in an advanced organic chemistry classing to a conclusion about candidates running for election based on reading multiple viewpoints on their platforms.
An example of synthesizing information is applying knowledge of basic chemistry from an introductory course towards understanding information in an advanced organic chemistry.
What happens when information is combined?When you synthesise knowledge, you take particular ideas and take them into account collectively to comprehend how they compare, contrast, and relate to one another. Students can get information from several sources and put it all together by synthesising it. When these sources are merged, a single, coherent concept is produced. This is the normal method used in class to teach students new concepts, theories, and knowledge.
What is an illustration of information synthesis?Making connections or putting things together is all that is required. We instinctively combine information to assist others in making connections between various concepts. Synthesis occurs, for instance, when you tell a friend what a number of other friends have remarked about a music or movie.
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Select the most acidic solution from these options.
Select the most basic (alkaline) solution from these options.
Select the least acidic solution from these options.
solution B, pH = 1
solution C, pH = 13
solution A, pOH = 1
Solution C is the one that has the highest acidity. Solution B has been the most basic, whereas Solution A has been the least acidic.
The given solutions in the compound has been:
Solution A = pOH = 1.5
Solution B = pOH = 7
Solution C = pOH = 13.5
The pH can be defined as the hydrogen ion concentration in the solution. The pH can be given as:
pH = 14 - pOH
pH of solution A has been:
pH = 14 - 1.5
pH = 12.5
The solution has thus been basic.
pH of solution B has been:
pH = 14 - 7
pH = 7.
The solution has been neutral.
pH of solution C has been:
pH = 14 - 13.5
pH = 0.5
The solution has been highly acidic.
Solution C has proven to be the most acidic. The least acidic solution has been solution A since it is more basic and so less acidic, while solution B has been the most basic.
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which term best describes the flow of electrons and protons from one place to another?(1 point) responses
The term best describes the flow of electrons and protons from one place to another is the electric current.
The electric current is describes as the flow of the electrons from the one place to the another place. The flow of the electrons in the wire or in the solution. The electricity defined the direction of the flow of the electrons. The direction of the movement of the electrons between the atoms is called as the electric current.
The unit of the electric current is the ampere. There are the two kinds of the electric current is direct current and the alternating current.
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cerium (ce) and ytterbium (yb) are both group 3b metals that exhibit other oxidation states in addition to the expected 3 state. write the condensed electron configurations of ce2 , ce3 , and ce4 ..
cerium and europium, the principal formal oxidation state of these elements is trivalent.
What is called element?An element is a fundamental item that can't be easily broken into smaller pieces. In chemistry and physics, an element is a substance that can't be broken down by non-nuclear reactions. In computing and mathematics, an element is a distinct piece of a larger system or set.
What is element and example?Elements are the tiny particles that make up matter. Science describes an element as a pure substance made of only 1 type of atom that can not be broken down further into other substances. For example, hydrogen (H) and oxygen (O) are elements, but water (H2O) H 2 O ) which is made of hydrogen and oxygen is NOT.
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Given the concentration gradient established by the Na^ start superscript, plus, end superscript/K^ starr superscript, plus, end superscript ATPase, which of the following movements can occur
Start superscript, plus, and finish superscript moments can occur in the concentration gradient that the sodium creates. The atomic number of sodium is 11 and its symbol is Na.
Which comes from the Latin word natrium. It is a highly reactive, silvery-white, pliable metal. Sodium is an alkali metal in group 1 of the periodic chart. Its only stable isotope is Na. The free metal cannot be found in nature, so it must be prepared from compounds. The sixth most common element in the Earth's crust, sodium, is found in many minerals, including feldspars, sodalite, and halite (NaCl). Uses, Chemical Composition, and Physical Properties of Sodium Sodium is an atomic number 11 chemical element with the symbol Na.
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6. Which of the following is not an indication that a chemical reaction has occurred?
(a) formation of liquid droplets above the solution
(b) the solution color changing from clear to yellow
(c) the solution color changing from brown to clear
(d) formation of a silvery metallic foil on the walls of the flask dients
Answer:
Explanation:
Answer: (a) Formation of liquid droplets above the solution is not an indication that a chemical reaction has occurred.
Which one of these elements is likely to form exactly three non-ionic interactions with hydrogen?.
Nitrogen is one of the element that is likely to form three ionic interaction with hydrogen to form ammonia (NH3).
The element that is most likely to interact with hydrogen in exactly three covalent ways is nitrogen. This substance is necessary for life. The importance of nitrogen and hydrogen for life Since nitrogen is significantly more electronegative than hydrogen, their covalent bonds are polar.
Only molecules with covalent bonds between hydrogen and either fluorine, oxygen, or nitrogen experience hydrogen bonding. The majority of the electron density in the covalent bond with hydrogen is removed by these three extremely electronegative elements, leaving the hydrogen atom with a very low electron density.
Because it is a component of DNA and RNA, nitrogen is essential for life.
Another important component of amino acids in proteins is nitrogen.
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If a symbol in a chemical formula does not have a subscript after it, a unit of that compound contains (0 items, 1 atom) of that element.
A unit of that compound comprises one atom of that element if the symbol for that element in the chemical formula does not have a subscript after it.
A chemical formula is a phrase that lists all of the constituent parts of a compound together with their interrelated ratios. There is no need for a subscript if there is just one atom of a certain kind. A subscript is counted to the symbol for an atom if it includes two or more of a certain type of atom.
An element has one atom present when its symbol is authored without a subscript following it. There are two atoms of that element present if the number 2 is depicted. Subscripts are important. When the subscript is changed, the content is also altered.
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which pair of compounds has the same empirical formula? c2h6 and ch ch3 and c2h6 c3h8 and c3h c2h2 and c2h
In the given question, a pair of compounds that has same empirical formula is [tex]\rm CH_3\ and\ C_2H_6[/tex]. Option a is the correct choice.
The term "compound" refers to two or more elements joined together such that the elements have lost their individual identity in favor of a new set of properties.
For [tex]\rm C_2H_6[/tex], the empirical formula can be calculated as follows:
- Divide the molar mass of each element by its atomic weight to get the number of moles of each element:
[tex]\rm C =\dfrac{ 2 }{ 12} = 0.167[/tex]
[tex]\rm H =\dfrac{ 6 }{1 }= 6.[/tex]
- Divide each number of moles by the smallest number of moles to get the simplest whole-number ratio:
[tex]\rm C = \dfrac{0.167 }{0.167}= 1[/tex]
[tex]\rm H = \dfrac{6 }{0.167} = 36[/tex]
- The empirical formula for [tex]\rm C_2H_6[/tex] is [tex]\rm CH_3[/tex].
For [tex]\rm CH_3[/tex], the empirical formula is also [tex]\rm CH_3[/tex].
Therefore, pair of compounds that have the same empirical formula is option a.[tex]\rm CH_3\ and\ C_2H_6[/tex], since both have the empirical formula of [tex]\rm CH_3[/tex].
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Scientists learn about the properties of some particles from the collisions that occur inside a __________.
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Scientists learn about the properties of some particles from the collisions that occur inside a particle accelerator.
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Increases by 10% to £18.15 work out original cost
For each of the following IR spectra, identify whether it is consistent with the structure of an alcohol, a carboxylic acid, or neither.• Alcohol • Carboxylic acid • Neither
Identifying the functional group of a molecule from an IR spectrum requires knowledge and experience in interpreting the spectra. However, I can tell you that some general features that can help differentiate alcohols, carboxylic acids, and other functional groups in IR spectra are:
Alcohols:
Typically have a broad and strong absorption in the 3200-3600 cm-1 region, which is due to the stretching vibration of the hydroxyl (-OH) group.
Carboxylic acids:
Carboxylic acids typically have a strong absorption in the 1700-1750 cm-1 region, which is due to the stretching vibration of the carbonyl (-C=O) group.
Carboxylic acids also have an absorption in the ~1200-1300 cm-1 region, which is due to the bending vibration of the carboxyl (-COOH) group
It is important to note that these are general guidelines, and that the exact position and shape of the absorption bands may vary depending on the specific compound and the environment in which it is in.
Additionally, other functional groups may also have similar absorption bands, so it is important to consider other information (such as the chemical structure) when interpreting an IR spectrum.
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