How many grams of NaCl are produced when 80.0 grams of O2 are produced? 2 NaClO3 ---> 2 NaCl + 3 O2

1 Answer
May 14, 2014

How many grams of NaCl are produced if 80.0 grams of O2 are produced?

We begin with a balanced chemical equation that is provided in the question.

2NaClO32NaCl+3O2

Next we determine what we have and what we want.
We have 80.0 grams of Oxygen and we want grams of Sodium Chloride.

We set up a roadmap to solve the problem

gramsO2molO2molNaClgramsNaCl

We need the molar mass (gfm) of O2 and NaCl.
O2 = 31.98 g/mol and NaCl = 58.44 g/mol.

We need the mole ratio between O2:NaCl 3:2. This comes from the coefficients of the balanced chemical equation.

Now we set up conversion factors following the roadmap from above.
Unit we want in the numerator, unit to cancel in the denominator.

80.0gO2x1molO231.98gO2x2molNaCl3molO2x58.44gNaCl1molNaCl=

Multiply the numerators, and divide the denominators.

The outcome is
97.5gNaCl
will be produced with 80.0 grams O2

I hope this was helpful.
SMARTERTEACHER