(i) How many grams of \( \mathrm{H}_{2} \mathrm{~S} \) are contained in 0.40 mole of \( \mathrm{...

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(i) How many grams of \( \mathrm{H}_{2} \mathrm{~S} \) are contained in 0.40 mole of \( \mathrm{H}_{2} \mathrm{~S} \) ?
(ii) How many gram atoms of \( H \) and \( S \) are contained in 0.40 mole of \( \mathrm{H}_{2} S \) ?
(iii) How many molecules of \( \mathrm{H}_{2} \mathrm{~S} \) are contained in 0.40 mole of \( \mathrm{H}_{2} \mathrm{~S} \) ?
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