How many grams of diphosphorus pentoxide result if 100.0 g of phosphorus are combined with sufficient oxygen?

Question

Arianna Kerr

Chemistry

17 July, 16:50

How many grams of diphosphorus pentoxide result if 100.0 g of phosphorus are combined with sufficient oxygen?

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Emily · Answer 1

Answer is: 230 g.

Chemical reaction: P₄ + 5O₂ → 2P₂O₅.

m (P₄) = 100 g.

M (P₄) = 4 · 31 g/mol = 124 g/mol.

n (P₄) = m (P₄) : M (P₄) = 100g : 124g/mol = 0,806 mol.

From reaction: n (P₄) : n (P₂O5) = 1 : 2.

n (P₂O₅) = 1,612 mol.

m (P₂O₅) = 1,612 mol · 142g/mol = 230g.

M - molar mass.

n - amount of substance.