Reaction Rate

Question 1

Magnesium oxide does not readily decompose into magnesium and oxygen. The reaction is shown below.MgO(s) + 601.7 kJ Mg(s) + ½O2(g)Which factor plays the most important role in allowing this reaction to occur?

Revolt · Accepted Answer

A: temperature

Question 2

Which best explains why sawdust burns more quickly than a block of wood of equal mass under the same conditions?

Revolt · Accepted Answer

C: More molecules in the sawdust can collide with oxygen molecules.

Question 3

Consider the energy diagram below.xn.Which line indicates a higher reaction rate?

Revolt · Accepted Answer

B: B because it has a lower activation energy.

Question 4

Which applies to the collision theory?

Revolt · Accepted Answer

A: Particles need to collide in order to react.

Question 5

Consider the reaction below.C2H4(g) + H2(g) C2H6(g)Which change would likely cause the greatest increase in the rate of the reaction?

Revolt · Accepted Answer

D: increase temperature and increase pressure

Question 6

Which term refers to the speed at which reactants are converted into products?

Revolt · Accepted Answer

A: reaction rate

Question 7

Consider the reaction below.Which is most likely the effect to the forward reaction if there is an increase in pressure of the system?

Revolt · Accepted Answer

B: The reaction rate decreases.

Question 8

Ben observes how quickly some dry wood is burning in a campfire. Which term best relates to Ben’s observation?

Revolt · Accepted Answer

A: reaction rate

Question 9

The diagram below shows the movement of particles.What does this piece of evidence best support?

Revolt · Accepted Answer

A: the collision theory

Question 10

Which will cause an increase in the reaction rate between molecules?

Revolt · Accepted Answer

B: Molecules collide more frequently.

Reaction Rate Answers

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