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Calculations involving masses

Calculations involving masses

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Question 86

A chemist combusts a 1.24 g sample of pure phosphorus in a stream of dry oxygen. It is found that exactly 1.60 g of oxygen gas reacts completely with the phosphorus to form a single solid phosphorus oxide.

Determine the empirical formula of this phosphorus oxide and use it to write a balanced chemical equation for this reaction.

Relative atomic masses (ArA_rAr​): P=31.0\text{P} = 31.0P=31.0, O=16.0\text{O} = 16.0O=16.0

You must show your working.

Balanced equation for the reaction:

..... P+..... O2→..... \text{..... P} + \text{..... O}_2 \rightarrow \text{.....} ..... P+..... O2​→.....
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Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

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