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Question

The number of sulphur atoms in 0.1 mol of S8 is .

A
0.8×6.022×1023
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B
6.022×1023
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C
0.8
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D
0.1×6.022×1023
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Solution

The correct option is A 0.8×6.022×1023

1 mole of S8 = 6.022 × 1023 molecules

0.1 mole of S8 = 6.022 × 1023 ×0.1 = 6.022 × 1022 molecules

1 molecule of S8 has 8 atoms of sulphur.

6.022 × 1023 ×0.1 molecules of S8 has 8 × 6.022 × 1023 × 0.1 atoms of S = 48.176 × 1022 atoms


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