If the molar mass of a substance is 20.0 g/mol, what is the mass of 3.01 x 10²⁵ molecules of the substance?

Question

Quizplus · Accepted Answer

To find the mass, first calculate the number of moles using Avogadro's number (6.02 x 10^23 molecules/mol). The number of moles is (3.01 x 10^25 molecules) / (6.02 x 10^23 molecules/mol) = 50 moles. Then, multiply the number of moles by the molar mass: 50 moles x 20.0 g/mol = 1.00 x 10^3 g.

If the Molar Mass of a Substance Is 20