A12 g sample of p^4o^10 contains how many
molecules of phosphorus pentaoxide?

molecules P4O10 = 2.546 E22 molecules

Explanation:

∴ mass P4O10 = 12 g

∴ mm P4O10 = 283.886 g/mol

⇒ mol P4O10 = (12 g)×( mol/283.886 g) = 0.0423 mol P4O10

⇒ molecules P4O10 = (0.0423 mol P4O10)×(6.022 E23 molecules/mol)

⇒ molecules P4O10 = 2.546 E22 molecules

b

explanation:

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