Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

A solution of aqueous sodium hydroxide has a concentration of $0.50\,\text{mol dm}^{-3}$. What mass of sodium hydroxide is needed to prepare $500\,\text{cm}^3$ of this solution?

  • A$10\,\text{g}$
  • B$20\,\text{g}$
  • C$40\,\text{g}$
  • D$160\,\text{g}$

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