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Atoms and Molecules — Science STD 10 — Question

Tamilnadu BoardEnglish MediumSTD 10ScienceAtoms and Molecules1 Mark
MCQ
Which of the following will have maximum mass?
  • ✓
    0.1 mole of $\mathrm{NH}_3$
  • B
    1022 atoms of carbon
  • C
     1022 molecules of CO2
  • D
    1 g of Fe
✓

Answer

Correct option: A.
0.1 mole of $\mathrm{NH}_3$
(a) 0.1 mole of $\mathrm{NH}_3$
Hint:
(a) 0.1 mole of $\mathrm{NH}_3$ has $6.023 \times 10^{23}$ atoms.
Mass of 1 mole of $\mathrm{NH}_3=17 \mathrm{~g}$
Mass of 0.1 mole of $\mathrm{NH}_3=1.7 \mathrm{~g}$.

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