Chemistry 5070 · O Level · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

Determine the ratio between the number of molecules in $71\,\text{g}$ of gaseous chlorine and the number of molecules in $2\,\text{g}$ of gaseous hydrogen.

  • A$1:1$
  • B$1:2$
  • C$2:1$
  • D$71:2$

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