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Atoms and reactions

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Question 6

Which sample contains the greatest number of oxygen atoms?

A

44.0 g of CO244.0\text{ g of }\text{CO}_244.0 g of CO2​

B

90.0 g of H2C2O4⋅2H2O90.0\text{ g of }\text{H}_2\text{C}_2\text{O}_4\cdot2\text{H}_2\text{O}90.0 g of H2​C2​O4​⋅2H2​O

C

72.0 g of H2O72.0\text{ g of }\text{H}_2\text{O}72.0 g of H2​O

D

135 g of CaCO3135\text{ g of }\text{CaCO}_3135 g of CaCO3​

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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