Answer to Question #178922 in Chemistry for kailyn

Question

How many grams is 3.5 x 1024 molecules of P2O4?

Answer 1

Solution:

One mole of any substance contains 6.022×10²³ atoms/molecules.

Hence,

Moles of P₂O₄ = (3.5×10²⁴ molecules of P₂O₄) × (1 mol / 6.022×10²³ molecules) = 5.812 moles P₂O₄

The molar mass of P₂O₄ is 125.94 g/mol.

Hence,

Mass of P₂O₄ = (5.812 mol P₂O₄) × (125.94 g P₂O₄ / 1 mol P₂O₄) = 731.96 g P₂O₄ = 732.0 g P₂O₄

Mass of P₂O₄ = 732.0 g

Answer: 732.0 grams is 3.5×10²⁴ molecules of P₂O₄.