Module 8 - Chemical Equations

Front

What are the smaller numbers that you CANNOT change in a chemical equation?

Back

Subscript

Front

Balance this equation: _Al + _HCl --> _H2 + _AlCl3

Back

2,6,3,2

Front

What is the little number after an element in a chemical equation called? Example: H2

Back

Subscript

Front

Balance this equation: _Zn + _HCl --> _ZnCl2 + _H2

Back

1,2,1,1

Front

Is the following equation balanced? 2C2H2 + 5O2 --> 4CO2 + 2H2O

Back

Yes

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are involved.

Front

What does it mean to balance a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is the law of conservation of mass?

Back

Matter cannot be created or destroyed in a chemical reaction.

Front

What is a reactant in a chemical equation?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical equation?

Back

A substance that is formed as a result of a chemical reaction.