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Atoms and reactions

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Question 91

A sample of 1.818 g of a vanadium oxide is completely reduced by heating with excess hydrogen gas. The reaction produces vanadium metal and 0.900 g of water.

What is the empirical formula of this vanadium oxide?

[Use relative atomic masses: H=1.0\text{H} = 1.0H=1.0, O=16.0\text{O} = 16.0O=16.0, V=50.9\text{V} = 50.9V=50.9]

A

VO2\text{VO}_2VO2​

B

V2O3\text{V}_2\text{O}_3V2​O3​

C

V2O5\text{V}_2\text{O}_5V2​O5​

D

VO\text{VO}VO

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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