Balancing Equations

Front

What is a coefficient?

Back

The large number to the left of a formula.

Front

Which problem is balanced?

Back

2Na + 2H₂O → 2NaOH + H₂

Front

The blue numbers in the image below represent ________

Back

subscripts

Front

Balance this equation: N₂ + H₂ → NH₃

Back

1,3,2

Front

Fill in the blanks with coefficient: PCl₅ + _ H₂O → _ HCl + H₃PO₄

Back

4, 5

Front

What is a subscript in a chemical formula?

Back

A small number that indicates the number of atoms of an element in a molecule.

Front

What does it mean to balance a chemical equation?

Back

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

Front

What is the purpose of coefficients in a chemical equation?

Back

To indicate the number of molecules or moles of a substance.

Front

Identify the balanced equation: 2H₂ + O₂ → 2H₂O, H₂ + O₂ → H₂O

Back

2H₂ + O₂ → 2H₂O

Front

What is the law of conservation of mass?

Back

Matter cannot be created or destroyed in a chemical reaction.