The rate of reaction between two gases increases when the temperature is increased and a catalyst is added. Which statements correctly describe the effect on the reaction?

I. Increasing temperature increases collision frequency
II. Increasing temperature decreases activation energy
III. Adding a catalyst increases the activation energy requirement
IV. Adding a catalyst decreases the activation energy requirement

Group of answer choices

I and III

II and IV

I and IV

II and III

Answers

Answer 1

Answer:

The answer is I and III :)

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Related Questions

Which of the following pH values indicates the most basic solution? A. 3 B. 7 C. 8 D. 11

Answers

The lower the pH, the more acidic the solution, the higher the pH the more basic the solution.

pH=11

How many electrons does calcian have to gain or lose to have 8 valence electrons

Answers

Answer:

two electrons

Explanation:

Calcium atoms will lose two electrons in order to achieve the noble gas configuration of argon.

What is the only non-metal that is not on the upper right side of the periodic table?

Answers

Answer:

Hydrogen

Explanation:

Hydrogen number one on the periodic table is on the left side and is a non metal gas.Hydrogen is on the left side because like members of the IA group containing Lithium, Sodium and Potassium it has a normal charge of +1.

Answer:

I believe it is Hydrogen

Explanation:

Calculate the volume that 2.25 mol of o2(g) will occupy at stp.

Answers

Explanation:

[tex]2.25mol \times \frac{22.4lit}{1mol} = 50.4 lit o2 [/tex]

How much heat energy is needed to change 10 kg of ice at to water at ? , ,

Answers

we know that,

W = mL + mcθ

W= 10(336+ 4.2(50))= 5460 kJ

so quantity of heat required is 5460 J

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Calculate the Gibbs energy, entropy, and enthalpy of mixing when 1.00mol C6H14 (hexane) is mixed with 1.00mol C7H16 (heptane) at 298K. Treat the solution as ideal.

Answers

With Hexane of 1.00 ml and 1.00 ml of hectane at 298, the calculated

Gibbs energy = 3.43Entropy = -3.43Enthalpy = 0

How to solve for the Gibbs energy

C6H14 = C6H14/C6H14+C7H16

1mol/1mol+1mol = 1/2 = 0.5 mol

1+1 x 8.3145J x 298 x 0.5ln0.5 + 0.5ln0.5

= 4955.442 0.6932

= 3435J

convert to KJ

G mix = 3.43

The Gibbs energy is therefore  3.43KJ/mol

The entropy of the solution

-(1+1 x 8.3145J x 298 x 0.5ln0.5 + 0.5ln0.5)

S mix = -3.43 KJ/mol

3.43/298 = 11.5

The enthalpy of the solution

3.43-3.43 KJ/mol

H mix = 0

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Calculate the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 ml solution.

Answers

Taking into account the definition of molarity, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 [tex]\frac{moles}{liter}[/tex].

Definition of molarity

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]molarity=\frac{number of moles}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

Molarity in this case

In this case, you have:

number of moles= 0.2 molesvolume= 100 mL= 0.1 L

Replacing in the definition of molarity:

[tex]molarity=\frac{0.2 mole}{0.1 L}[/tex]

Solving:

molarity= 2 [tex]\frac{moles}{liter}[/tex]

Finally, the molarity of a solution prepared by dissolving 0.2 mol sucrose in enough water to make a 100 mL solution is 2 [tex]\frac{moles}{liter}[/tex].

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___ Uses moving air and doesn't pollute the atmosphere.____ uses dead plant matter and burning it releases carbon emissions into the atmosphere.


1. 2.

a. Biomass Energy a. Biomass Energy

b. Solar energy b. Solar energy

c. Hydropower Energy c. Hydropower energy

d. Wind Energy d. Wind Energy

Answers

Answer: 1 d. Wind Energy 2. a. Biomass Energy

Explanation:

The use of the moving air has been found to use wind energy, and the dead plants burning is formed with the biomass energy.

What is energy?

The energy has been given as the required form to perform a task. The energy can be generated with the pressure and the force of various matters.

Wind energy is produced with the use of the moving air and has been a clean form of energy, i.e. not pollute the region.

The biomass energy has been produced with the use of the dead plants and the matter and releases carbon dioxide.

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Complete the mechanism for the reaction of butanone with NaBH4 followed by the addition of aqueous acid. Butanone is a 4 carbon chain where carbon 2 is double bonded to oxygen. This reacts with N a B H 4, followed by H 3 O plus to give the final product. Step 1: draw curved arrows. ⟶ Step 2: Draw the charged organic intermediate product. Include nonbonding electrons and charges. Omit the counterion. −→−−H3O+ Step 3: Draw the final product

Answers

The formation of a primary alcohol from a ketone involves the use of a ketone and NaBH4 followed by an acid workup.

Formation of a primary alcohol

The question is unclear but clearly relates to the formation of a primary alcohol. The first step in this reaction is the attack of the NaBH4 on the carbonyl carbon of butanone.

The reaction sequence is completed by an acid work up in which an acidic hydrogen is abstracted by the nucleophile to yield a primary alcohol.

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Complete and balance the following half-reaction in acidic solution mno4 ---> mno2

Answers

The completely balanced reaction of the half-reaction in acidic solution is ; MnO₄⁻ (aq)  + 3e⁻ + 4H⁺ ------>  MnO₂(s)  +  2H₂O(l)

Given data :

The half-reaction in acidic solution

MnO₄⁻ (aq) --> MnO₂(s)

Complete and balance the Half-reaction

Determine the oxidation number on both sides

Oxidation number of Mn in MnO₄⁻  = +7

Oxidation number of Mn in MnO₂ = +4

First step : Balance the oxidation number

MnO₄⁻ (aq)  + 3e⁻  ------ > MnO₂(s)

Next step : Balance the charge in the reaction

MnO₄⁻ (aq)  + 3e⁻ + 4H⁺ ------>  MnO₂(s)

Final step : Completely balance the half reaction

MnO₄⁻ (aq)  + 3e⁻ + 4H⁺ ------>  MnO₂(s)  +  2H₂O(l)

Hence we can conclude that The completely balanced reaction is :

MnO₄⁻ (aq)  + 3e⁻ + 4H⁺ ------>  MnO₂(s)  +  2H₂O(l)

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HELLO MAY I GET HELP AGAIN?

Answers

Answer:

( c ) sunlight.

Explanation:

the leaves are closer to the sunlight they require.

Two compounds might have spots with the same rf value in a chromatography experiment and not be identical compounds. Which proposed chromatography experiment could best help determine whether the compounds are identical?.

Answers

The repeat of the original chromatography experiment with a different solvent might could best help determine whether the compounds are identical.

What is chromatography?

Chromatography is a technique used in the laboratory to physically separate two different objects and/or materials.

In chromatography, these materials are separated into two phases called the stationary phase and the movement phase.

Chromatography is also used to purify a given substance and thus determine its exact composition.

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Algae are microscopic plants that grow in the ocean. Algae must have sunlight, nutrients, and water to survive. They conditions are called _______
for algae.

Answers

The condition is called phytoplankton because algae are microscopic, need sunlight and nutrient, water to survive.

What is phytoplankton?

Phytoplankton refers to microscopic marine algae and they are also called microalgae.They are similar to terrestrial plants in that they contain chlorophyll and require sunlight in order to live and grow. Most phytoplankton are very buoyant and float in the upper part of the ocean, where sunlight enter the water and they get the sunlight to produce food.

Algae photosynthesized,that is they use sunlight in the presence of chlorophyii and carbondioxide to produce food and oxygen.

Therefore, The condition is called phytoplankton because algae are microscopic, need sunlight and nutrient, water to survive.

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What conditions makes the wind blow faster and stronger?
Larger differences in air pressure over a large area.
Small differences in air pressure over a large area.
Larger differences in air pressure over a small area.
Small differences in air pressure over a small area​

Answers

Larger differences in air pressure over a small area makes the wind blow faster and stronger.

What is pressure?

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

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1. Describe the liquid state according to the
kinetic-molecular theory.

Answers

Answer:

Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience intermolecular forces. These forces keep particles close together.

Explanation:

hope it helps U

Which of the following elements has the largest electronegativity?
Fluorine (F)
Bromine (Br)
Lithium (LI)
Calcium (Ca)

Answers

Answer:

FLUORINE

Explanation:

It has 5 electrons In Its 2P shell!

Answer:

Fluorine

Explanation:

because it has a score of 4.0 which is the highest possible

give the names of the 5 types of chemical reactions you are responsible for
remembering, and also give the letter model(A + C → D etc.)

Answers

Answer:

What are 5 types of chemical reactions?

1. Combination (Synthesis) reaction. A + B → AB.

2. Decomposition reaction. AB → A + B.

3. Displacement reaction. A + BC → AB + C.

4. Double displacement reaction. AB + CD → AD + BC.

5. Combustion reaction. CH4 +2O2 → CO2 + 2H2O.

Explanation:

The reaction between alcohols and carboxylic acids is called

Answers

Explanation:

When a carboxylic acid is treated with an alcohol and an acid catalyst, an ester is formed (along with water). This reaction is called the Fischer esterification.

The reaction between alcohols and carboxylic acids is called Fischer esterification.

What is Fischer esterification?

Fischer Esterification is an organic reaction that produces an ester by converting carboxylic acids in the presence of excess alcohol and a strong acid catalyst.

This ester is created in the presence of water.

Thus, the reaction between alcohols and carboxylic acids is called Fischer esterification.

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How is the hfusion used to calculate the energy needed to melt a mass of
solid?

Answers

Answer:

You can use fusion to measure the amount of energy required to melt a given amount of a solid at its melting point temperature.

Explanation:

hello, I need help with this question

Answers

Answer:

carnivores organism get their energy from eating other organisms..

According to the kinetic theory of gases, an ideal gas molecule

Answers

Answer:

According to the kinetic theory of gases, in an ideal gas between two successive collisions, a gas molecule travels in a straight line.

According to the kinetic theory of gases, an ideal gas molecule move in a straight line between two successive collisions.

What is the kinetic theory of the gases?

The kinetic theory of gases says that the gas is many large numbers of subatomic particles, which randomly motion always.

They move on a straight plane and only change their path when they collide with other molecules or the container's walls.

Thus, according to the kinetic theory of gases, an ideal gas molecule move in a straight line between two successive collisions.

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During this chemical reaction energy is absorbed. In the chemistry lab, this would be indicated by a decrease in temperature or if
the reaction took place in a test tube, the test tube would feel colder to the touch. Reactions like this one absorb energy because
A) the reaction requires activation energy.
B) the reactants have less potential energy than the products.
C)the reactants have more potential energy than the products.
D)the mass of the products is greater than the mass of the reactants.

Answers

Reactions like this one absorb energy because the reactants have less potential energy than the products.

What is an Endothermic reaction?

This is the type of reaction in which the reactants absorb heat energy from the surroundings to form products.

This brings about a decrease in the temperature as a result of the reactants having less potential energy than the products thereby making option B the most appropriate choice.

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Mass defect for oxygen-16 = 0. 13261 amu How many kilograms does the mass defect represent? 1. 66 × 10-27 kg 2. 20 × 10 -28 kg 3. 0 × 108 kg 8. 24 x 1025 kg.

Answers

Mass defect for oxygen-16 = 0. 13261 amu, in the kilograms the mass defect equals to 2.20 × 10⁻²⁸ kg.

What is mass defect?

Mass defect is the difference between the mass of of an whole atom and the combined mass of its individual particles present in that atom.

We know that, 1 amu = 1.6 × 10⁻²⁷ kg

Given that, mass defect for oxygen-16 = 0.13261 amu

To calculate this defect in terms of kilograms, we have to convert into kg unit as:

0.13261 amu = 0.13261 amu × 1.6 × 10⁻²⁷ kg/amu

0.13261 amu = 2.20 × 10⁻²⁸ kg

Hence option (2) is correct.

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In a terrarium, the pincushion moss, the echeveria, and the moon cactus make up which of the following? Select all that apply. A. a population B. part of a community C. part of an ecosystem​

Answers

The pincushion moss, the echeveria, and the moon cactus in a terrarium make up a community.

What is a community of organisms?

A community of organisms refers to a group of organisms of different species which are found living together in the same habitat.

Populations of organisms of different species within the same habitat constitute a community.

The pincushion moss, the echeveria, and the moon cactus are all different species found within the same habitat, a terrarium.

Therefore, the different species of organisms in the terrarium make up a community.

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Answer: part of a community and part of an ecosystem  

Explanation:

What is equation for photosynthesis

Answers

Answer: The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

hope this helps!

Answer:

6CO2 + 6H2O → C6H12O6 + 6O2

Explanation:

Predict which one of the following salts is used for softening water?

A) [tex] Na_{2} SO_{4}[/tex]

B) [tex] Na_{2} Si O_{3}[/tex]

C) [tex] Na_{2} CO_{3}[/tex] x [tex] 10 H_{2}O[/tex]

D) [tex] NaClO_{3} [/tex]

Answers

Salts such as [tex] Na_{2} SO_{4}[/tex] are used in softening of hard water.

What is hardness of water?

Hardness of water is the presence on water of dissolved metallic ions such as calcium and magnesium ions results in the water having additional properties such as taste.

Hardness of water is of significance in the laundry industry as it causes water to lather with difficulty and also produces sc_um.

To remove hardness of water or to soften water, salts such as [tex] Na_{2} SO_{4}[/tex] are used.

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A reaction that is spontaneous at low temperature can become non spontaneous at high temperature if δh is\

Answers

Answer:

Reaction

Explanation:

A reaction that is spontaneous at low temperature

On the basis of the information below, the dissolution of FeF2(s) in acidic solution is A. thermodynamically favorable, because K2 > 1 B. thermodynamically favorable, because K3 > 1 C. not thermodynamically favorable, because K1<1 D. not thermodynamically favorable, because K3 < 1 hint (Hess's law) FeF2(s) – Fe2+(aq) + 2 F"(aq) F"(aq) + H+ (aq) 2 HF(aq) FeF2(s) + 2 H+ (aq) 2 Fe2+ (aq) + 2 HF(aq) K1 = 2 x 10-6 K2 = 1 * 103 K3 = ?

Answers

Since K3 is greater than 1, the reaction is thermodynamically favorable.

Data;

FeF2 is in an acidic solutionK2 > 1 is thermodynamically favorablek3 > 1 is not thermodynamically favorableK1<1 is not thermodynamically favorable

Hess Law

This states that the heat change in a given chemical reaction is the same irrespective of the number of process in which the reaction is effected.

Using Hess Law;

[tex]rxn_3 = rxn_1 * 2rxn_2\\k_3 = k_1 * k_2^2\\k_3 = 2*10^-^6 * (1*10^3)^2\\k_3 = 2[/tex]

substituting this using Gibbs law,

[tex]\delta G^0_3 = -RT\ln K_3\\\delta G^0_3 < 0[/tex]

Since K3 is greater than 1, the reaction is thermodynamically favorable.

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What happens to a catalyst as the result of a chemical reaction?

A.) It slows a chemical reaction.
B.) It is not consumed.
C.) It is consumed.
D.) It changes to something else.

Answers

I’m pretty sure a catalyst speed up a chemical reaction.

The answer is b

The catalyst is recovered unchanged in amount and chemical composition at the end of a reaction. It speeds up only a spontaneous reaction, not a spontaneous one. It is not consumed in a reaction. The correct option is B.

What is a catalyst?

A substance which increases the rate of a reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is known as the catalysis. It is believed that a catalyst actually participates in the chemical reaction that it speeds up.

A catalyst does not affect the position of equilibrium of a reversible reaction and thus do not alter its equilibrium constant. This is because it speeds up the forward and backward reactions to the same extent. It shows some specificity in its action.

It does not alter the Gibbs energy.

Thus the correct option is B.

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A) 2 and 3 only
B) 1 and 4 only
C) 2,3,4 only
D) all of the above
choose one correct answer ​

Answers

Answer:

D

[tex] \: \: \: \: [/tex]

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