Their bonds are polar because every oxygen has a delta - and every carbon has a delta +. an element with the chemical symbol C and indeed the isotope 6 Tetravalent, nonmetallic, and it.
What does a carbon serve?Metals are melted down using coke & charcoal, both of which are impure forms of carbon. It is especially important there in steel and aluminium industries. Graphite can be found in electric motor brushes, furnace linings, and pencil leads. Activated charcoal is used for filtering and purification.
what is Carbon's level of risk ?poisonous nature of carbon. Thousands of fatalities occur each year in North America as a result of the odourless gas carbon monoxide. Inhaling carbon monoxide is exceedingly dangerous. It is the main cause of poisoning deaths in the country.
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microscale reactions involve reaction mixtures with volumes ?
Microscale reactions involve reaction mixtures with volumes of 5 ml or less than 5 ml.
What exactly is a microscale reaction?Microscale chemistry (also known as tiny-scale chemistry, in German: Chemie am Mikromaßstab) is an analytical approach as well as a teaching method that works with small quantities of chemical compounds. Benefits of Teaching with Microscale Chemistry explains how microscale chemistry allows you to perform more experiments in less time while also being safer, more exact, less expensive, and creating less waste.
A chemical reaction includes the transformation of reactant atoms, ions, and/or molecules into product atoms, ions, and/or molecules at the microscopic level. This necessitates the breaking of certain connections, the formation of others, and the relocation of some nuclei.
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Suppose one electron in H2 is excited from the MO to the o*1s MO. Would you expect the H atoms to remain bonded to each other, or would the molecule fall apart? a. Fall apart, as the bond order changes from one to zero. b. Remain bonded, as the bond order changes from 1 to 1%. c. Remain bonded, as the bond order remains the same. d. Fall apart, as the bond order changes from 1 to 1%. e. It is not possible to excite an electron from the 01s MO to the o'is MO in Hz.
Remain bonded, as the bond order remains the same. When electrons are excited from the 01s MO to the o'is MO in H2, the bond order remains the same. This means that the molecule does not break apart, and the H atoms remain bonded to each other.
What is electrons?Electrons are particles of matter with a negative electrical charge. They are the smallest and most basic unit of matter and are found in atoms. Electrons are much smaller than protons and neutrons, and they orbit the nucleus of an atom in an electron cloud. Electrons are responsible for chemical bonding between atoms and also for electrical conduction.
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The pH of 0.10 M HOCl is 4.23. Calculate Ka for hypochlorous acid.
Express your answer using two significant figures.
Calculate pKa for hypochlorous acid.
Express your answer using two decimal places.
The Ka for hypochlorous acid is 0.841 x 10^-8 whose pH of 0.10M HOCl is 4.23 is and its pKa for this acid is 8.075.
Given pH of hypochlorous acid (HOCl) = 4.23
The concentration of [HOCl] = 0.10M
We know that HOCl is dissociated as follows:
HOCl <==> H+ + ClO-
Ka = [H+] [ClO-]/[HOCl]
Let the concentration of [H+] and [ClO-] be x. Then,
Ka = (x)(x) / 0.10
We know that pH = -log([H+])
[H+] = 10^-4.23 = 0.000058M = 0.58 x 10^-4M
Ka = (0.58x10^-4) * (0.58 x 10^-4) / 0.40 = 0.841 x 10^-8
Then pKa = -log(Ka)
pKa = -log(0.841 x 10^-8) = 8.075
Hence the required Ka and pKa of hypochlorous acid are 0.841 x 10^-8 and 8.075 respectively.
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A solution contains 32 g of KNO3 per 100.0 g of water at 25 C Is the solution unsaturated, saturated, or supersaturated?
At 25 C, a solution has a KNO3 concentration of 32 g per 100.0 g of water. The solution is therefore not saturated.
At 25 C, is KNO3 soluble in water?Explanation: You are well aware that the solubility of potassium nitrate, KNO3, in water varies between 38.0 g at 25 degrees Celsius and 155 g per 100 g at 75 degrees Celsius.
A saturated solution is what?A solution is said to be saturated when it has dissolved all of the solute it can. At a certain temperature, no additional solute can dissolve in a saturated solution. By continuing to dissolve the solute until no more can be done, we can create a saturated solution.
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Consider the following reaction sequence H D CI NaNH2 NH3 Get help answering Molecular Dra Draw the structure of A. Make sure to draw the counterion as well, and make sure to include charges. B, clearly showing the configuration of any chiral center that is present in the structure.
A. The product of the reaction sequence is Na[(CH3)2NH2]Cl, where Na is the counterion. There is no chiral center in the structure, so no configuration needs to be shown.
What is reaction sequence?A reaction sequence is a series of chemical reactions in which one reaction leads to the next. It is a set of chemical reactions that takes place one after another in the same order. Reaction sequences can involve single or multiple reactions, and the reactions can be either in the same container or in separate containers. In a reaction sequence, each reaction is dependent on the product of the previous reaction, which then acts as the reactant for the next reaction.
B. There is no chiral center present in the structure, so no configuration needs to be shown.
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if 4.2 g of methane reacts with excess oxygen gas to form carbon dioxide and water in the following chemical equation, how much water is produced in the reaction?
The mass of water is produced in the reaction of methane with oxygen gas is 9.35 g.
What is chemical reaction of methane reacts with oxygen?In a chemical reaction, reactants undergo a reaction and change into products throughout a chemical process.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
mass of methane is 4.2 g
molar mass is 16.04 g/mol.
The number of moles of methane present is 4.2 g / 16.04 g/mol = 0.26 moles.
From the chemical equation, we can see that for every 1 mole of methane that reacts, 2 moles of water are produced.
if 0.26 moles of methane react, then 2 * 0.26 moles = 0.52 moles of water are produced.
molar mass of water = 18.02 g/mol
moles of water produced, 0.52 moles.
mass of water produced = 18.02 g/mol * 0.52 moles = 9.35 g.
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Recall that you found the empirical formula for a hydrocarbon to be CH2. If you are now told that a mass spectrometer was used to find that the molecular weight of the compound was 70, which of the following is most likely the name of the compound
The most likely name of the compound is hexane.
The empirical formula of a hydrocarbon is CH2, which corresponds to a compound made of Carbon and Hydrogen atoms. The molecular weight of the compound is 70, which means that the compound is composed of 6 Carbon atoms and 14 Hydrogen atoms. The hydrocarbon compound with 6 Carbon atoms is hexane. The molecular formula of hexane is C6H14.
Hexane is a hydrocarbon with six carbon atoms in a straight chain, it is a colorless liquid that is widely used as a solvent and in the production of various industrial and consumer products.
It's important to note that the empirical formula gives the simplest whole number ratio of atoms in a compound and the molecular formula gives the actual number of atoms in a compound.
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a chemist ways of three separate test samples of 0.70 g 0.240 and 2.3 g what is the total weight of the three
The total weight of the three test samples is weighed by the chemist is 3.240g.
the total weight is 0.70 g + 0.240 g + 2.3 g = 3.240 g. It is the sum of the weight of the three test samples.In chemistry, test samples are small amounts of a substance that are taken from a larger batch and used for testing or analysis. They are typically measured in grams (g) or milligrams (mg). The size of the test sample will depend on the type of analysis being performed and the amount of material available for testing. For example, in qualitative analysis, a small amount of the substance is often enough to identify the presence of a particular element or compound, whereas in quantitative analysis, larger test samples may be needed to obtain accurate measurements of the concentration of a substance.In general, it is important to accurately measure the weight of test samples in order to obtain precise and accurate results from chemical analysis. This is typically done using a balance or scale that is capable of measuring very small weights.
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action of sulfur trioxide with atmospheric water droplets results in sulfuric acid, a contributor to acid rain. according to the equation below, how many moles of sulfuric acid can you predict will be formed from 58.0 g of so3 and an excess of water?
The moles of sulfuric acid will be formed from 58.0 g of so3 in water is found to be 0.724⋅mol.
How does acid rain work?Sulfur dioxide (SO2) and nitrogen oxides (NOX) that are released into the atmosphere and carried by air currents and wind result in acid rain. Acids made of sulfuric and nitric compounds are produced when the SO2 and NOX react with oxygen, water, and other substances. Before dropping to the ground, they then combine with water and other substances.
Moles of sulfur trioxide=58.0⋅g/80.07⋅g⋅mol−1 = 0.724⋅mol .
Sulfur trioxide causes acid rain in what way?Inhaling sulphur trioxide fumes can be harmful and result in burns to the skin and internal organs. Acid rain is a result of sulphur oxides combining with water vapour in the atmosphere to form sulfuric acid.
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Tectonic plates are huge pieces of HHEOITERPSL __________________ that slowly move on the HHTNSESEPROAE _
Answer:
Lithosphere, Asthenosphere
Explanation:
I am pretty sure that's right
Answer:plate motion, or tectonic shift
Explanation:
For which of the following elements could the central atom exhibit sp 3 d 2 hybridization?CSNB
Since there is not much of an energy difference between the 3p and 3d subshells in S, an electron may move easily between them, making sp³d² hybridization conceivable.
What exactly does hybridization mean?The process of two key mono DNA and/or RNA molecules joining together to generate a double-stranded molecule is known as hybridization in the context of genomics. The proper base pairing between the four single-stranded molecule is necessary for the bonding.
D begins from the third orbital as the energy disparity between subshells.
As a result, an electron cannot move from the second to the third orbital plane. They are therefore unable to undergo sp³d² hybridization.
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the rate constant for a reaction increases from 10.0 to 100 when the temperature is increased from 300k to 400k what is the activcation energy
A reaction's rate constant rises from 10.0 to 100. when the temperature rises from 300°C to 400°C 45.6 kJ/mol is the activation energy.
The activation energy for the reaction can be calculated using the Arrhenius equation, which relates the rate constant to the activation energy and the temperature. The Arrhenius equation is: k = A * e^(-Ea/RT). Where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature. By rearranging the equation to solve for Ea, we get: Ea = -RT * ln(k/A)We know that k1 = 10.0 s^-1 at T1 = 300 K, and k2 = 100. s^-1 at T2 = 400 K. We can use these values to calculate the activation energy: Ea = -(8.314 J/mol*K) * (400 K - 300 K) * ln(100/10)=Ea ≈ 45.6 kJ/mol.
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BCD Chemical Distributors has prepared a barrel of hazardous chemicals to be shipped to your employer. Select from the options to determine which items must be in place before it can be shipped. Select all that apply.answer choicesSDSPrice TagWarning LabelShipping Item Sheet
Specified elements including pictograms, signal words and hazard and precautionary statements.
What is necessary for each hazardous chemical on a construction site?Employers are required to keep copies of SDSs for any hazardous substances in their workplaces. If you do not immediately receive an SDS from your provider, you must request one. You must also make sure that SDSs are easily available to employees when they are in their work areas during their shifts.
OSHA has modified the criteria for hazardous chemical labeling under its Hazard Communication Standard (HCS). Pictograms, a signal word, hazard and precautionary remarks, the product identity, and supplier identification are all needed on all labels.
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8. distinguish between a strong electrolyte and a weak electrolyte. how can colligative properties be used to distinguish between strong and weak electrolytes?
There's some characteristic that can distinguish between a strong and weak electrolyte:
1. in strong electrolyte when in aqueous solution, it totally dissociates into ions while weak electrolyt, in an aqueous solution, it partially dissociates into ions.
2.In strong electrolyte most free ions are present in the solution. while weak electrolyte both free ions and undissociated molecules can be found in its solution.
3. strong electrolyte concentration of ions in the solution is extremely high.
while in weak electrolyte Ion concentration in the solution is low.
4. Strong electrolyte has high electrical conductivity while weak electrolyte has some electrical conductivity.
An electrolyte splits into ions when it is dissolved in a solvent like water (or any other conductive species). Because of this, two or more moles of conductive species always result from the dissolution of one mole of electrolyte. As a result, when an electrolyte is dissolved in a solvent, the colliding characteristics of the electrolytes change significantly.
For instance, the following generic equation can be used to describe variations in freezing point and boiling point:
Tb = Kbm, and Tfz = Kfm.
Tfzeeze stands for freezing point depression and Tb for boiling point elevation. The freezing point depression constant is Kf, and the boiling point elevation constant is Kb. The solution's molarity is given by m. The aforementioned equations are adjusted as follows for electrolytic solutions:
iKbm for Tb and iKfm for Tfz
I stands for the Van't Hoff factor, an ion multiplier. The number of moles of ions provided by an electrolyte is equal to this factor. Therefore, the amount of ions released by an electrolyte during its dissolution in a solvent can be used to calculate the Van't Hoff factor. Van't Hoff factor values for NaCl and CaCl2, respectively, are 2 and 3, respectively.
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How many milliliters of a 1% (m/v) nacl solution should you use to deliver 18.5 g of nacl?
give your answer to 1 decimal place, with just the numerical value (do not include the units).
18.5 * 10² milliliters of NaCl solution have to use to deliver 18.5g of NaCl.
Given data:
1% (m/v) NaCl
For 18.5g
1g --------------------------100ml
18.5g ---------------- Xml
X = 1850ml
The mass/ volume percent of a result is defined as the rate of the mass of solute that's present in a result, relative to the volume of the result, as a whole. Because this type of attention is expressed as a chance, the indicated proportion must be multiplied by 100.
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How many moles of ammonia are in 2.00 moles of ammonia with solution
In two moles of NH3, there are 12.04 × 10²³ molecules. Ammonia is a gas that is colorless, extremely unpleasant to breathe, and causes choking.
How much ammonia causes harm to people?Concentrations exceeding 5000 ppm typically result in abrupt respiratory arrest, while concentrations between 2500 and 4500 ppm can be lethal in about 30 minutes. Skin injury can be induced by anhydrous ammonia at concentrations higher than 10,000 parts per million.
How else is ammonia used?80% of the ammonium produced by businesses is employed as fertilizer for agriculture. Ammonia is also used to create polymers, explosives, textiles, pesticides, dyes, and other compounds in addition to its various applications.
6.02×10²³ atoms, molecules
one mole NH₃
= 6.02×10²³ molecules
= 2 × (6.02×10²³ )
= 12.04 × 10²³ molecules.
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which position on the potential energy diagram corresponds to the species shown for the reaction of para fluro trifluoromethyl benzene with sodium methoxide
The position on the potential energy diagram that corresponds to this reaction would be the transition state.
What is reaction?A reaction is a response or an action that is taken in response to a stimulus. Physical, chemical, or psychological reactions are all possible. Physical reactions include movements, such as reflexes, and involve the body’s muscles, nerves, and other tissues. Chemical reactions involve the transformation of matter from one form to another and can be used to create new substances or break down existing ones. Psychological reactions involve emotions, thoughts, and behavior, and are often the result of a person’s response to an event or situation. All reactions involve changes in the environment of the individual or group and can involve both positive and negative responses.
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Select the element(s) that will have one unpaired electron in the p orbital.
A. Ar
B. Mg
C. Al
D. O
E. Cl
The element that will have one unpaired electron in the p orbital will be aluminum (Al).
The electronic configuration of the given element as follows:
The atomic number of argon (Ar) will be 18: 1s22s22p63s23p6
The atomic number of magnesium (Mg) will be 12: 1s22s22p63s2
The atomic number of aluminum (Al) will be 11: 1s22s22p63s23p1
The atomic number of oxygen (O) will be 8: 1s22s22p4
The atomic number of chlorine (Cl) will be 17: 1s22s22p63s23p5
Therefore, aluminum is the only element hat will have one unpaired electron in the p orbital.
Thus be concluded that element Al will have one unpaired electron.
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an aqueous sodium nitrate (nano3) solution must be created for an experiment. if 50.00 ml of a 0.150 m solution is needed, what amount of sodium nitrate (in grams) must be weighed out?
If you need to make a na2so4 nitrate solution for an experiment, weigh out 0.6375 g of sodium nitrate.
Experiment? What do you mean?a method used in a controlled setting to find a previously undiscovered effect or law, validate a theory, or provide an example of an existing law. experimenting, the act of testing
What was the outcome of the experiment?An experiment is a procedure used to verify or refute a theory, as well as gauge the success or viability of something that hasn't been done before. Experiments illuminate cause-and-effect linkages by demonstrating how happens when a specific ingredient is changed.
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Write the total and net ionic equations for the reaction in which the antacid Al(OH)3 neutralizes the stomach acid HCl. Identify the type of reaction.
a. Identify the spectator ions in this reaction. b. What would be the advantages of using Al(OH)3 as an antacid rather than NaHCO3, which undergoes the following reaction with stomach acid?
NaHCO3(aq) + HCl(aq) →→→→ NaCl(aq) +
H₂O(l) + CO₂(g)
help please !
Answer:
Al(OH)3 + 3HCl ---------> AlCl3 + 3H2O
A solution contains 45 g of KNO3 per 100.0 g of water at 25 ∘C. Is the solution unsaturated, saturated, or supersaturated?
At 25 °C, a solution has a KNO3 concentration of 45 g per 91.7 g of water. Unsaturated, saturated, or fully saturated is the state of the solution
How can you tell whether a solution is full or not?What distinguishes a saturated solution from an unsaturated one? The previous solution was saturated if extra solution is applied and does not dissolve. The experimental method was unsaturated if the extra solute dissolves.
How much KNO3 can dissolve in 100 water grams at 40 degrees Celsius?100 grams od water and 35 kilograms of KNO3 are dissolved in a solution at 40 degrees Celsius. Answer and justification This indicates that at 80 ° C., the saturated KCl solution will have a KCl content of 50 grams per 100 grams.
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Part A
What is the reaction that corresponds to the first ionization energy of sodium, Na?
Express your answer as a chemical equation.
Part B
What is the reaction that corresponds to the electron affinity of chlorine, Cl?
Express your answer as a chemical equation
The reaction for sodium, Na, that corresponds to the first ionization energy is as follows:
Na(g) → Na⁺(g) + e⁻
In many cases, this energy is expressed in kJ/mol.
The following reaction for chloride, Cl, corresponds to the first ionization energy:
Cl(g) + e⁻ →Cl(g)
What is ionization energy?The energy needed to eject an electron from a gaseous atom is referred to as the ionization energy. Ionization energy, sometimes referred to as ionization potential, is the amount of energy needed to remove an electron from an isolated atom or molecule in physics and chemistry.
Here,
For Sodium, Na, the reaction that corresponds to the first ionization energy is the following one:
Na(g) → Na⁺(g) + e⁻
This energy is frequently expressed in kJ/mol
For Chloride, Cl, the reaction that corresponds to the first ionization energy is the following one:
Cl(g) + e⁻ →Cl(g)
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Write a sentence that describes this chemical reaction:
Na(s) + H2O(l) ⇒ NaOH(aq) + H2(g)
The sentence that describes this chemical reaction: is that:
The chemical reaction describes the process where solid sodium (Na) reacts with liquid water (H₂O) to produce aqueous sodium hydroxide (NaOH) and hydrogen gas (H₂).What is the chemical reaction about?This chemical reaction is an example of a neutralization reaction, where an acid and a base react to form a salt and water. In this case, the acid is hydrogen gas (H₂) and the base is sodium hydroxide (NaOH). The reaction can be written as:
Na(s) + H₂O(l) --> NaOH(aq) + H₂(g)
where Na(s) represents solid sodium, H₂O(l) represents liquid water, NaOH(aq) represents aqueous (dissolved in water) sodium hydroxide and H₂(g) represents hydrogen gas.
Sodium (Na) is a metal and a strong base. It reacts with water to produce hydrogen gas and a solution of sodium hydroxide, which is a strong base. When sodium metal is added to water, it reacts by losing an electron and becoming a positively charged ion (Na+). At the same time, water molecules, H₂O, split into hydrogen ions (H+) and hydroxide ions (OH-).
Therefore, It is an exothermic reaction, meaning it releases heat. It can also be dangerous as hydrogen gas is flammable and can cause explosion if it comes in contact with an ignition source.
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What is the instantaneous rate of the reaction at t=800. s ? and the units please?
An average reaction rate is calculated as the change in the concentration of reactants or products over a period of time in the course of the reaction. An instantaneous reaction rate is the rate at a particular moment in the reaction and is usually determined graphically.
The reaction of compound forming compound was studied and the following data were collected
Time (s)
0. 0.184
200. 0.129
500. 0.069
800. 0.031
1200 0.019
1500 0.016
average reaction rate between 0 and 1500 is 1.12*10 to the negative fourth. M/s
average reaction rate between 500 and 1200s is 7.14 *10 to the negative fifth
The average rate is 7.14*10-5 M/s in units
The instantaneous rate of the reaction at t = 800 s can be determined by taking the derivative of the concentration of the reactant or product = 800 s.t with respect to time at that specific point.
However, we don't have an equation describing the relationship between the concentration and time, so we can't calculate the derivative. Instead, we can approximate the instantaneous rate by using the average reaction rate over a small interval of time that includes t=800s.
Using the average rate between 500 and 1200 is a good approximation of the instantaneous rate at t = 800. The average rate is 7.14*10-5 M/s in units.
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which findings on capnography indicate the normal movement of carbon dioxide through the respiratory system?
According to capnography research, EtCO2 is part of the normal flow of carbon dioxide through the respiratory system.
What capnography results show what is normal?End-tidal carbon dioxide, a parameter used in capnography, quantifies ventilation (EtCO₂). The pressure unit mm Hg (millimeters of mercury) is used to measure EtCO₂ values. No matter the patient's age, gender, race, or size, the normal values fall between 35 and 45 mm Hg, or around 5% CO₂.
When a patient has a high EtCO₂ reading at the beginning of treatment, a drop in that reading signifies improvement. If there is no change or an increase in EtCO₂, it means that respiratory effort is still insufficient to sufficiently remove CO₂ and that additional interventions are required.
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Classify each process by its individual effect on the entropy of the universe, S.
Drag the appropriate items to their respective bins: Increases S of the Universe, Does not Affect S of the Universe, Decreases S of the Universe.
a process run infinitesimally slowly at equilibrium and reversed to its original state
a constant composition mixture of solid and liquid water at STP (273.15 K and 1 atm)
motion of a frictionless pendulum
a bag of red marbles and a bag of green marbles dumped together on a table top
ice melting to water above the melting point
sublimation of naphthalene
(mothballs)
Entropy is a measure of disorder, so it follows that as molecular randomness rises, entropy will as well.
What is Entropy?Entropy is a measurable physical characteristic and a scientific concept that is frequently connected to a state of disorder, randomness, or uncertainty. Entropy is the measurement of the amount of thermal energy per unit of temperature in a system that cannot be used for productive work. Entropy is a measure of a system's molecular disorder or randomness because work is produced by ordered molecular motion. Ice melting is the ideal illustration of entropy. The individual molecules are arranged and fixed as ice.
Here,
The processes that have no impact on the universe's entropy are as follows:
1. A process that was run infinitesimally gradually until it reached equilibrium and then reversed.
2. A mixture of solid and liquid water with a constant composition, at standard pressure and temperature.
3. a frictionless pendulum swinging back and forth.
The processes that increase the universe's entropy are as follows:
1. A tabletop covered with a bag of green marbles and a bag of red marbles.
2. Above the melting point, ice melts into water.
3. Slowly converting into oxygen and water is hydrogen peroxide.
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Does not Affect S of the Universe .Part A), B) and C) are included .
What is Entropy?Entropy is a measurable physical characteristic and a scientific concept that is frequently connected to a state of disorder, randomness, or uncertainty. The quantity of temperature energy produced per unit of warmth in an unit that cannot be put to use in a useful way is measured as entropy. Entropy is a measure of a system's molecular disorder or randomness because work is produced by ordered molecular motion. Ice melting is the ideal illustration of entropy. The individual molecules are arranged and fixed as ice.
Does not Affect S of the Universe
a process with a fixed composition of liquid and solid water at STP that is performed insignificantly slowly at harmony and then reverted to its initial condition (273.15 K and 1 atm)
motion of a frictionless pendulum
Increases S of the Universe
a bag of red marbles and a bag of green marbles dumped together on a table top
above the melting point, ice melts to water.
sublimation of naphthalene
Entropy rises when molecular randomness does as well.
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The complete Question :
Classify each process by its individual effect on the entropy of the universe, S.
Drag the appropriate items to their respective bins: Increases S of the Universe, Does not Affect S of the Universe, Decreases S of the Universe.
A) a process run infinitesimally slowly at equilibrium and reversed to its original state
B) a constant composition mixture of solid and liquid water at STP (273.15 K and 1 atm)
C) motion of a frictionless pendulum
D) a bag of red marbles and a bag of green marbles dumped together on a table top
E) ice melting to water above the melting point
F) sublimation of naphthalene
(mothballs)
I need help with this question
Answer:
Liquid; melting.
Explanation:
So what is being shown is a phase change diagram. Because we start at an atm of 1.5 (staying steady means that it doesn't drop so we always stay at 1.5 atm) and at a temperature of -150, the original state of matter is a solid. Next, we look at what happens when the temperature goes to 300 degrees, yet still maintaining the 1.5 atm. This means that it now turns into a liquid (based on placement on diagram). This means the matter after the temperature change was a liquid. And going from solid to liquid would be called melting.
Here's an example phase diagram so that you can rely on it in the future problems!
For the reaction represented by the equation Mg + 2HCl → H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium chloride. (Show your work on a separate sheet of paper and keep it to turn in when you return to school)a. 74.3%
b. 81.6%
c. 84.2%
d. 71.8%
The percentage yield of magnesium chloride is 84.16%.
To calculate the percentage yield of magnesium chloride, you would divide the amount of magnesium chloride produced by the theoretical amount that could have been produced and multiply by 100.
First, we will calculate the theoretical yield of magnesium chloride. The balanced equation for the reaction is:
Mg + 2HCl → H2 + MgCl2
So for every 1 mole of Mg, we get 1 mole of MgCl2
To convert mass to moles we use the molar mass of each substance:
Mg = 24.3 g/mol
MgCl2 = 95.2 g/mol
So 100g of Mg is equal to (100 / 24.3) = 4.1 moles of Mg
and the theoretical yield of MgCl2 is 4.1 moles * 95.2g/mol = 391.32 g.
Now we can calculate the percentage yield by dividing the actual yield (330 g) by the theoretical yield (391.32 g) and multiplying by 100:
(330 / 391.32) * 100 = 84.16%.
So the percentage yield of magnesium chloride is 84.16%.
This means that 84.16% of the theoretical yield of magnesium chloride was actually produced in the reaction.
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in an experiment, the concentration of a is monitored every 20 seconds as the reaction proceeds. explain how you can use the data from the experiment to determine the rate constant, k, of the reaction mentioned above.
The rate constant, k, of a reaction can be calculated from the data collected from an experiment by fitting the data to the integrated rate law equation for a given order reaction.
What is reaction?Reaction is a response to a stimulus or event. It can be conscious or unconscious, and can range from physical changes, such as a reflex or a dilation of the pupils, to psychological changes, such as an emotional reaction or a change in behaviour.
The integrated rate law equation for a first-order reaction is ln(A) = -kt + ln(A0), where A is the concentration of the reactant at any given time, A0 is the initial concentration of the reactant, and k is the rate constant. By plotting ln(A) versus time and fitting the data to the equation, the rate constant k can be calculated from the slope of the best-fit line.
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Bacterial fermentation of sugars usually results in results in ___________ end products. end products whereas breakdown of proteins and amino acids the formation of __________ Multiple Choice O acidic........alkaline O acidic.....alcoholic O alkaline.......sulfide O alcohol........acidicO alkaline........acidic
Acidic end products are typically produced when bacteria digest carbohydrates. alkaline is produced as a result of the degradation of proteins and amino acids.
Which 20 necessary amino acids are there?
Histidine, valine, leucine, lysine, homocysteine, phenylalanine, threonine, tryptophan, & valine are the necessary amino acids. Alanine, asparagine, asparagine, glutamic acid, & serine are the non-essential amino acids.
What does a skin amino acid do?
All protein, including the most prevalent protein filaments in the skin, keratins, collagen, and elastin, are made up of amino acids. Skin that is chronically sun-damaged, aged, and neglected exhibits sagging and wrinkles, which are mostly attributed to the degeneration of collagen fibres.
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