Question

What is the mass, in grams, of a 0.420 mole sample of carbon? The molar mass of carbon is 12.01 g/mol.

Answer 1

Answer: 5.04g C

Step-by-step explanation:

This is a unit conversion problem, specifically a mole-gram conversion, so we will be converting from mol C (moles of carbon) to g C (grams of carbon) using our given number of moles and the molar mass of carbon.

0.420mol C (
`(12.01g C)/(mol C)`) = 5.04g C

We're multiplying mol by
`(g)/(mol)`, so the mol cancels out, leaving our desired unit, grams.

I hope this helps! :)