Practice Test

Question 1

Mora measures the speed of the particles in a solid mass. She wants to speed up the action. Which action will allow her to do so?

Revolt · Accepted Answer

lowering the activation energy

Question 2

What has occurred? Ciara’s bike has rusted, which means that the iron in the metal changed to rust.

Revolt · Accepted Answer

a chemical reaction

Question 3

Which represents an endothermic reaction?

Revolt · Accepted Answer

splitting a gas molecule

Question 4

If a chemical reaction does not reach its activation energy, which will most likely occur?

Revolt · Accepted Answer

The chemical bonds will remain unchanged.

Question 5

The equation for water is cap h sub 2 plus cap o sub 2 rightarrow cap h sub 2 cap o To balance the equation, which coefficient should be placed in front of cap h sub 2 and cap h sub 2 cap o ?

Revolt · Accepted Answer

2

Question 6

Which statement best describes balancing equations and the law of conservation of mass?

Revolt · Accepted Answer

The number of atoms is the same in the reactants and in the products, and the total mass is the same in the reactants and in the products.

Question 7

A chemical reaction that has the general formula of AB rightarrow cap A plus cap b is best classified as a [Dropdown 1] reaction.

Revolt · Accepted Answer

[Dropdown 1] decomposition; decomposition

Practice Test Answers

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