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Chemical synthesis — Question 5

QCAA 2022, Paper 1 · 1 mark

Q5 · 2022 · Paper 1Unclassified1 mark

QUESTION 5

Phosphorus pentoxide is prepared by burning phosphorus in oxygen.

P4(s)+5O2(g)→P4O10(s)\mathrm{P}_{4}\mathrm{(s)}+\mathrm{5O}_{2}(g) \rightarrow P_{4}\mathrm{O}_{10}\mathrm{(s)}

Calculate the percentage yield if 10.0 g of P4O10 is produced when 0.200 mol of P4 and 0.200 mol of O2 are reacted.

(A) 2.0%

(B) 3.5%

(C) 17.6%

(D) 88.0%

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