Question

The molecular mass of octane is 114.22 g/mol. What is the mass of 22.05 mol of octane? 5.180 g 22.05 g 114.22 g 2,518 g

Answer 1

Answer:

The mass of 22.05 mol of octane is 2,518 g.

Explanation:

Molar mass of octane = 114.22 g/mol

Mass of 1 mole of octane is 112.22 g/mol.

Mass of compound:

Moles of compound  × Molar mass of compound

Mass of 22.05 moles of octane is:

$22.05 mol\times 114.22 g/mol=2,518.55 g$

The closest answer from the given options is 2,518 g.

Answer 2

1 mole ----------- 114.22 g
22.05 moles ---- ?

mass octane = 22.05 x 114.22 / 1

mass octane  = 2,518 g

Answer D

hope this helps!