Question

What is the mass of two moles of propane gas, C3H8?

Answer 1

According to the equation:

m = n × Mr

where m - mass, n - number of moles, Mr - molecular weight.

As the molecular weight of propane equals 44 g/mol:

m (propane) = 2 mol × 44 g/mol = 88 g

Answer: 88 g