Balance equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the coefficient for Al in the equation: _Al + _O2 → _Al2O3?

Back

4

Front

What is the coefficient for H3 in the equation: F3 + H3 → _HF?

Back

3

Front

What coefficients balance the equation: PCl5 + _H2O → _HCl + H3PO4?

Back

4, 5

Front

What coefficients balance the equation: AlCl3 + NaOH → Al(OH)3 + NaCl?

Back

1, 3, 1, 3

Front

What coefficients balance the equation: _C + _H2O → _CH4 + _CO2?

Back

2, 2, 1, 1

Front

What is the first step in balancing a chemical equation?

Back

Identify the number of atoms of each element in the reactants and products.