IB Physics SL B.3.2 Amount of substance Question Bank

Practise IB Physics SL B.3.2 by using moles, molar mass and Avogadro’s constant to count particles and compare samples.

Exam points

Convert mass to moles and particles using molar mass and Avogadro’s constant.
Compare atom, molecule and isotope ratios from masses, formulas and relative atomic masses.

[Maximum number: 1]

This question is in two parts. Part 1 is about ideal gases and specific heat capacity. Part 2 is about simple harmonic motion and waves.
Part 1 Ideal gases and specific heat capacity

Argon behaves as an ideal gas for a large range of temperatures and pressures. One mole of argon is confined in a cylinder by a freely moving piston.

Define what is meant by the term one mole of argon.

One mole of argon is the molecular weight of argon in grams, or $6.02\times10^{23}$ argon atoms, or the same number of particles as in 12 g of carbon-12.

Allow atoms or molecules for particles.

1\ \mathrm{mol}=6.02\times10^{23}\ \text{particles}

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B.3.2—Amount of substance question 1