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Atoms and reactions

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Question 53

Which statement gives the numerical value of the Avogadro constant?

A

The number of moles of hydrogen atoms in 1.0 g1.0\text{ g}1.0 g of hydrogen gas, H2\text{H}_2H2​.

B

The total number of atoms in 6.0 g6.0\text{ g}6.0 g of water, H2O\text{H}_2\text{O}H2​O.

C

The number of electrons lost by 40.1 g40.1\text{ g}40.1 g of calcium when it reacts completely with chlorine.

D

The number of ions in 1.0 mole1.0\text{ mole}1.0 mole of aluminium oxide, Al2O3\text{Al}_2\text{O}_3Al2​O3​.

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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