If 8.53 x 10²⁴ molecules of a substance have a mass of 483 g, what is the molar mass of the substance?

Question

Quizplus · Accepted Answer

To find the molar mass of the substance, we need to divide the mass (483 g) by the number of molecules (8.53 x 10^24).

Molar mass = mass/number of particles

Molar mass = 483 g/8.53 x 10^24

Molar mass = 0.0566 x 10^-24 g/particle

Molar mass = 5.66 x 10^-26 g/particle

Now we convert g/particle into g/mol by multiplying by Avogadro's number (6.02 x 10^23 particles/mol).

Molar mass = 5.66 x 10^-26 g/particle x 6.02 x 10^23 particles/mol

Molar mass = 34.1 g/mol

Therefore, the best choice is B.

If 853 X 1024 Molecules of a Substance Have a Mass