Question

A chemist has 2.0 mol of methanol (CH3OH). The molar mass of methanol is 32.0 g/mol. What is the mass, in grams, of the sample?

Answer 1

Given: 2.0 mol of methanol, molar mass of methanol(32.0 g/mol)
Wanted: Grams of 2.0 mol of methanol

Grams of solute= 2.0mol * 32.0g/1 mole = x

2.0 * 32.0 = [64.0g CH3OH]

Hope this is helpful!

Answer 2

Mass = 64 g

Solution:

Mole is the quantity of a substance that contains number of particles exactly equal to particles found in 12 g of Carbon-12. The number of particles are 6.022 × 10²³ also called as Avogadro Number. Mole is given as,

Mole = Mass / Molar Mass ----- (1)

Data Given;

Mole = 2.0 mol

M.Mass = 32.0 g.mol⁻¹

Mass = ??

Solving equation 1 for Mass,

Mass = Mole × M.Mass

Putting values,

Mass = 2.0 mol × 32.0 g.mol⁻¹

Mass = 64 g