Balancing Equations

Front

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

Back

Subscript

Front

What is the total number of atoms present in 5Na₃PO₄?

Back

40

Front

Is H₂O an element or a compound?

Back

Compound

Front

Balance the following equation: ___ H₂ + ___ O₂ → ___ H₂O

Back

2, 1, 2

Front

Is the following equation balanced? 4Fe + 3O₂ → 2Fe₂O₃

Back

Yes

Front

What is a coefficient in a chemical equation?

Back

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

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.

Front

What is the total number of atoms in 2H₂ + O₂?

Back

4

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that start a chemical reaction, while products are substances formed as a result of the reaction.