Which has the maximum molecules?

Which has the maximum molecules?
  1. $7 g \mathrm{~N}_2$
  2. $2 \mathrm{H}_2$
  3. $16 \mathrm{~g} \mathrm{NO}_2$
  4. $16 \mathrm{O}_2$

Solution

no. of moles = mass of molecule/ molecular weight. $7 g \mathrm{~N}_2 \rightarrow \frac{7}{28}=0.25$ moles $2 \mathrm{~g} \mathrm{H}_2 \rightarrow \frac{2}{2}=1$ mole $16 \mathrm{~g} \mathrm{NO}_2 \rightarrow \frac{16}{46}=0.347 \mathrm{moles}$ $16 \mathrm{~g} \mathrm{O}_2 \rightarrow \frac{16}{32}=0.5$ moles

Asked in: NEET 2002

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