Question

A chemist measures the amount of oxygen gas produced during an experiment. He finds that 11.5 g of oxygen gas is produced. Calculate the number of moles of oxygen gas produced.

Answer 1

0.359 moles.

Step-by-step explanation:

The oxygen gas has a molecular formula O2. In table periodic, the molar mass of one atom of oxygen is 16 g/mol, so the molar mass of O is 32 g/mol.

Molar mass, mass and number of moles are related by the equation below:

`n = (m)/(MM)`

Where n is the number of moles, m is the mass, and MM is the molar mass of the compound.

So, for 11.5 g of O2 produced:

`n = (11.5)/(32)`

n = 0.359 moles