Answer to Question #125225 in Inorganic Chemistry for Kenny

Question

A gas cylinder contains 5.0 kg of propane.
How many propane molecules are in the cylinder? The Avogadro constant, L = 6.022 × 1023 mol–1

Answer 1

M(C3H8) = 44 g/mol

n(C3H8) = 5000 (g)/44 (g/mol) = 113,6 mol

N = n•N_A = 113,6 • 6,02•10²³ = 684,1•10²³ molecules

Answer: 684,1•10²³ molecules of propane are in the cylinder.