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2.1 Purity and separating mixtures

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Question 6
F

A compound of phosphorus and oxygen has the empirical formula P2O5\mathrm{P_{2}O_{5}}P2​O5​.

The relative formula mass of the compound is 284.0.

What is the molecular formula of the compound?

Relative atomic mass (ArA_{r}Ar​): O = 16.0 P = 31.0

[1]
A

P2O10\mathrm{P_{2}O_{10}}P2​O10​

B

P4O5\mathrm{P_{4}O_{5}}P4​O5​

C

P4O10\mathrm{P_{4}O_{10}}P4​O10​

D

P6O15\mathrm{P_{6}O_{15}}P6​O15​

Markscheme

2.1 Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

51 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.

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