Percentage purity of a sample of gold is 85%. How many atoms of gold are present in 1g sample? (Atomic mass of Gold =197u) |
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(a) |
2.6 21 |
(b) |
2.6 1023 |
(c) |
3.0 1021 |
(d) |
4.5 1020 |
Percentage purity of a sample of gold is 85%. How many atoms of gold are present in 1g sample? (Atomic mass of Gold =197u) |
|||||||
(a) |
2.6 21 |
(b) |
2.6 1023 |
(c) |
3.0 1021 |
(d) |
4.5 1020 |