Question 1

What is the substance on the left side of the equation called?

Accepted Answer

reactants

Answer

chemical eqaution

Answer

coefficient

Answer

products

Question 2

What is the substance that speeds up or starts a chemical reaction?

Accepted Answer

catalyst

Answer

reactant

Answer

inhibitor

Answer

product

Question 3

The process in which one or more substances change to produce a new substance is a ____________________.

Accepted Answer

chemical reaction

Answer

physical change

Answer

chemical formula

Answer

physical reaction

Question 4

A substance that slows down a chemical reaction is called a(n) ________________________.

Accepted Answer

inhibitor

Answer

reactant

Answer

product

Answer

catalyst

Question 5

The substance or molecule that starts a chemical reaction is the _______________.

Accepted Answer

reactant

Answer

product

Answer

chemical equation

Answer

chemical formula

Question 6

What type of reaction is caused when heat is released

Accepted Answer

exothermic

Answer

endothermic

Question 7

The 2 in CO2 represents the _____________.

Accepted Answer

subscript for oxygen

Answer

coefficient of carbon dioxide

Answer

subscript for carbon dioxide

Answer

coefficient of oxygen

Question 8

Methane has 1 carbon atom and 4 hydrogen atoms.  What is the correct formula for this substance?

Accepted Answer

CH4

Answer

4CH

Answer

C4H4

Answer

C4H

Question 9

What is the law of conservation is mass?

Accepted Answer

atoms are never gained or lost in a reaction

Answer

all equations are written left to right

Answer

we can create and destroy atoms during a reaction

Answer

elements are paired with other elements

Question 10

What is an example of an endothermic reaction?

Accepted Answer

photosynthesis

Answer

fireworks exploding

Answer

burning coal

Answer

sodium and water

Question 11

Is the following chemical equation balanced?    2CA + O2 ----2CaO

Accepted Answer

True

Answer

False

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