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

The mole and the Avogadro constant — practice question

What ratio compares the number of molecules present in 71 g of gaseous chlorine with the number of molecules present in 2 g of gaseous hydrogen?

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

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