How many particles are in a 34 g sample of Al2(SO4)3?

Answer 1

molar mass Al₂(SO₄)₃ = 342 g/mol

34 g x 1 mol / 342 g = 0.099 moles

Particles may refer to molecules/formula units or atoms.

Number of formula units = 0.099 moles x 6.02x10²³ formula units / mole = 6.0x10²² formula units

Number of atoms = 6.0x10²² formula units x 17 atoms / formula unit = 1.0x10²⁴ atoms