Conservation of Mass Test Review

Front

What are the substances listed on the left side of a chemical equation?

Back

Reactants

Front

What are the coefficients used to balance the equation: Ag2O → ? Ag + ? O2?

Back

2, 4, 1

Front

Balance the equation: _Al + _HCl → _H2 + _AlCl3

Back

2, 6, 3, 2

Front

What is the term for the small number written below an element in a chemical formula?

Back

Subscript

Front

How many Hydrogen (H) atoms are in NH3O5?

Back

3

Front

What is the term for the substances formed on the right side of a chemical equation?

Back

Products

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the same number of each type of atom is present on both sides of the equation.

Front

What does a coefficient in a chemical equation represent?

Back

The number of molecules or moles of a substance.

Front

What is the law that states mass is neither created nor destroyed in a chemical reaction?

Back

Law of Conservation of Mass

Front

In the equation 2H2 + O2 → 2H2O, what does the '2' in front of H2O represent?

Back

It indicates that there are 2 molecules of water produced.