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Atoms and reactions

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Question 5
50%

Which statement gives the numerical value of the Avogadro constant?

A

The number of moles of atoms in 12.0 g12.0\text{ g}12.0 g of carbon-12.

B

The number of atoms in 16.0 g16.0\text{ g}16.0 g of oxygen gas, O2\text{O}_2O2​.

C

The number of ions in 1.0 mole1.0\text{ mole}1.0 mole of sodium chloride, NaCl\text{NaCl}NaCl.

D

The number of electrons lost by 24.3 g24.3\text{ g}24.3 g of magnesium when it reacts with chlorine.

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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