Question 1

What is a substance that alters the rate of a chemical reaction without being permanently changed by the reaction?

Accepted Answer

catalyst

Answer

base

Answer

acid

Answer

ion

Question 2

What are the new substances produced by a chemical reaction?

Accepted Answer

products

Answer

reactants

Answer

solute

Answer

solution

Question 3

What is a number that indicates how many molecules or formula units of a substance are involved in a chemical reaction?

Accepted Answer

coefficient

Answer

superscript

Answer

subscript

Answer

ratio

Question 4

What is the type of chemical reaction in which a compound breaks down?

Accepted Answer

decomposition

Answer

synthesis

Answer

combustion

Answer

combination

Question 5

What is the kinetic energy necessary for molecules to chemically react?

Accepted Answer

activation energy

Answer

maximum velocity

Answer

necessary speed

Answer

origin energy

Question 6

states that every chemical reaction causes a decrease in usable energy and an increase in entropy

Accepted Answer

second law of thermodynamics

Answer

law of conservation of mass

Answer

LeChatelier's principle

Answer

first law of thermodynamics

Question 7

states that when a system at equilibrium is disturbed, the system will react to partially offset the disturbance

Accepted Answer

LeChatelier's principle

Answer

first law of thermodynamics

Answer

second law of thermodynamics

Answer

law of conservation of mass

Question 8

can be used to determine whether a reaction is spontaneous

Accepted Answer

second law of thermodynamics

Answer

law of conservation of mass

Answer

first law of thermodynamics

Answer

LeChatelier's principle

Question 9

relates the energy gained by a system to the energy lost by its surroundings

Accepted Answer

first law of thermodynamics

Answer

second law of thermodynamics

Answer

LeChatelier's principle

Answer

law of conservation of mass

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