Balancing Equations

Front

Is this equation balanced? 2H2 + O2 -> 2H2O

Back

No

Front

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

Back

Subscript

Front

What does the arrow in a chemical equation represent? H2 + O2 -> H2O

Back

Yields

Front

How many atoms of aluminum are on each side of the equation: 4Al + 3O2 -> 2Al2O3?

Back

4

Front

Balance this equation: _N2 + _H2 -> _NH3

Back

1,3,2

Front

What is a coefficient in a chemical equation?

Back

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

Front

What are reactants in a chemical equation?

Back

Substances that undergo a chemical change in a reaction.

Front

What are products in a chemical equation?

Back

Substances that are formed as a result of a chemical reaction.

Front

What does it mean to balance a chemical equation?

Back

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

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.