If 26.2 grams of a pure compound contain 8.77 * 1022 molecules, what is the molecular weight of this compound? Answer in units of g/mol.

Question

Chemistry

Peter Nixon

26 August, 08:45

If 26.2 grams of a pure compound contain 8.77 * 1022 molecules, what is the molecular weight of this compound? Answer in units of g/mol.

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Answers (1)

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Starr · Answer 1

Mw = 179.845 g/mol

Explanation:

Mw [=] g/mol

∴ w = 26.2 g

∴ 1 mol = 6.02 E23 molecules ... Avogadro's number

⇒N° moles = 8.77 E22 molecules * (mol / 6.02 E23 molecules) = 0.146 mol

⇒ Mw = 26.2 g / 0.146 mol = 179.845 g/mol