Chemical Reactions

Front

How is a chemical change different from a physical change?

Back

A new substance is formed in a chemical change, whereas in a physical change, no new substance is formed.

Front

How many Carbons are present on the reactant side?

Back

1

Front

How many Hydrogens are on the product side of this chemical equation?

Back

4

Front

How many Oxygens are on the product side of this chemical equation?

Back

4

Front

Is this chemical equation balanced? Why or why not?

Back

No, none of the elements (carbon, hydrogen, or oxygen) are the same amount on both the reactant and product side.

Front

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

Back

reactants

Front

A change in the shape of an object is an example of _________________.

Back

a physical change

Front

The starting materials in a chemical reaction

Back

Reactants

Front

The new substances that are made after a chemical equation are the

Back

Products

Front

The blue numbers in the image below represent ________

Back

subscripts