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Gas Laws · Paper 2 — Free Physics HL Practice Questions

1MasterySAQ-SBoyle’s law, Charles’s law, Avogadro’s law5 marksPaper 2~8 min

A student places two identical balloons, one filled with

0.50 \text{ mol}

of oxygen gas

(\text{O}_2)

and the other with

0.25 \text{ mol}

of nitrogen gas

(\text{N}_2)

, in a room at constant temperature and pressure.

(a)

State Avogadro's law. [1 mark]

(b)

The oxygen balloon has a volume of

12.0 \text{ L}

. Calculate the volume of the nitrogen balloon. [2 marks]

(c)

A classmate claims that because

\text{O}_2

has a greater molar mass than

\text{N}_2

, the oxygen balloon must be heavier and will therefore sink while the nitrogen balloon floats. Evaluate this claim. [2 marks]

Solutions

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