CAIE IGCSE Chemistry 3.3.3 Amount of substance relation: amount

Practise using moles, molar mass and Avogadro constant to convert between mass, amount and particle numbers in chemical samples.

Exam points

calculate amount from mass and molar mass, then convert to atoms, ions or molecules
determine water of crystallisation by comparing moles of salt and H2O

[Maximum number: 1]

Sulfur is a Group VI element.

A sample of sulfur contains two isotopes, ${ }^{32} \mathrm{~S}$ and ${ }^{34} \mathrm{~S}$ .

State the mass of $6.02 \times 10^{23}$ atoms of ${ }^{34} \mathrm{~S}$ . Include units in your answer.

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