Chemical Reactions and Balancing Equations

Front

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

Back

Subscript

Front

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

Back

2, 6, 3, 2

Front

In the equation, 2Mg + O2 --> 2MgO, which are the reactants?

Back

Mg and O

Front

Balance the following equation: ___ Mg + ___ O2 → ___ MgO

Back

2, 1, 2

Front

Balance this equation: H2 + Cl2 --> HCl

Back

H2 + Cl2 --> 2HCl

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 in the reaction.

Front

What does it mean for a chemical equation to be balanced?

Back

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

In a chemical reaction, matter is neither created nor destroyed.

Front

What is a product in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

Front

What is a reactant in a chemical reaction?

Back

The starting substances that undergo change in a chemical reaction.