**..... AND ITS UNIT OF MEASUREMENT, MOLE**

We can "count" the number of atoms or molecules in a sample of substance, by weighing the sample. The link between its mass and the number of particles is the concept of chemical amount, of which the unit of measurement is a mole.

1 mol of each of (i) nitrogen gas at STP, mass 28.02 g; (ii) iron, mass 55.85 g; (iii) water (with colouring), mass 18.02 g; and (iv) sodium chloride, mass 58.44 g.

How big would a sample of 1 mol of table sugar look alongside these? You might need to calculate its mass to get an idea. Table sugar is sucrose, whose formula is ..... ?

How big would a sample of 1 mol of table sugar look alongside these? You might need to calculate its mass to get an idea. Table sugar is sucrose, whose formula is ..... ?

******This post is closely related to the post**

**0502 Avogadro constant: How many particles is that?**

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**Answers: 1 (C); 2 (A); 3 (D); 4 (B); 5 (C); 6 (A)**

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