Unit 6 Chemical Reactions

Front

In a chemical reaction, what must be true?

Back

The number of atoms in the reactants and products must be the same.

Front

In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is

Back

H₂

Front

What is the whole number that appears in front of a formula in a chemical equation?

Back

a coefficient

Front

Al(OH)₃ + Cu₂S-->

Back

Al₂S + Cu(OH)

Front

N₂ + 3H₂ --> 2NH₃
Which of the following is the word equation for the above formula equation?

Back

nitrogen + hydrogen --> nitrogen trihydride

Front

According to the law of conservation of mass, the total mass of the reacting substance(s) is

Back

always equal to the total mass of the product(s)

Front

In the word equation, sodium oxide + water --> sodium hydroxide, the formula for sodium hydroxide is represented by

Back

Na(OH)

Front

Which word equation represents the reaction that produces water from hydrogen and oxygen?

Back

Water is produced from hydrogen and oxygen

Front

Aluminum + lead (II) nitrate -->

Back

aluminum nitrate + lead

Front

Sodium + chlorine -->

Back

sodium chloride