Question

Calculate the following:

a) Number of Sulphur molecules in 3.2 g of S8

b) Number of molecules of methane in 80.0 g of it

c) The mass of 1 molecule of ammonia

d) The mass of 0.25 moles of calcium

Answer 1

Explanation:

Weight of 1 mol sulphur = molar mass of sulphur

32g=1 mol

3.2g=0.1 mol

1 mol has 6.022×10

23

atoms

0.1 mol will have 6.022×10

22

atoms

Answer 2

Answer:

molecular mass of sulphur molecules = 3.2 × 8

Explanation:

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