Question

calculate the mass of 1.6g ×10²³ molecules AL²O³​

Answer 1

Answer:

The molar mass of Na

2

SO

4

.10H

2

O is

2(23)+32+4(16)+10(18)=322 g/mol.

1 mole of Na

2

SO

4

.10H

2

O contains 14 moles of O atoms.

1 mole of Na

2

SO

4

.10H

2

O corresponds to 14×16=224 g of O.

Amount of oxygen in 32.2g of Na

2

SO

4

.10H

2

O is 32.2×224322=22.4 g