\( 2 \mathrm{~g} \) of oxygen contain number of atoms equal to that...

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\( 2 \mathrm{~g} \) of oxygen contain number of atoms equal to that
\( \mathrm{P} \) contained by:

W
[molar mass of: \( \mathrm{N}_{2}=28 \mathrm{~g} / \mathrm{mol} ; \mathrm{O}_{2}=32 \mathrm{~g} / \mathrm{mol} \);
\( \mathrm{Na}=23 \mathrm{~g} / \mathrm{mol} ; \mathrm{S}=32 \mathrm{~g} / \mathrm{mol} ; \mathrm{Ca}=40 \mathrm{~g} / \mathrm{mol}] \)
(A) \( 2 \mathrm{~g} \) of calcium
(B) 4 g sulphur
(C) 9 g nitrogen
(D) 4 g sodium.
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