CAIE A-Level Chemistry AS 2.2.1 Terms Mole Questions

Practise defining the mole using the Avogadro constant and calculating amounts of atoms, molecules and ions from masses, volumes and concentrations.

Exam points

Define and use the mole and Avogadro constant to calculate amounts of particles, atoms, molecules and ions in chemical samples.

[Maximum number: 1]

Which of these samples of gas contains the same number of atoms as 1 g of hydrogen gas?

22 g of carbon dioxide ( $M_{\mathrm{r}}: \mathrm{CO}_{2}, 44$ )

8 g of methane $\left(M_{\mathrm{r}}: \mathrm{CH}_{4}, 16\right)$

20 g of neon ( $M_{\mathrm{r}}: \mathrm{Ne}, 20$ )

8 g of ozone ( $M_{\mathrm{r}}: \mathrm{O}_{3}, 48$ )

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