If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of g/mol?

Answer:

If we know the number of moles and the mass of the substance, we can calculate the molar mass. They are related by the equation:

Molar Mass = Mass / Moles

If you're ever stuck and can't remember, you can tell this by the units:

Molar Mass (g / mol) = Mass (g) / Moles (mol)

Using this equation we have:

Molar mass = 62.5 g / 0.274 mol

= 228 g/mol