Which sample contains the largest number of atoms ? - Vidyadip

MCQ

Which sample contains the largest number of atoms ?

A
$1\, mg$ of $C_4H_{10}$
B
$1\, mg$ of $N_2$
C
$1\, mg$ of $Na$
✓
$1\, ml$ of $H_2O$

✓

Answer

Correct option: D.

$1\, ml$ of $H_2O$

d
$1 \mathrm{mg}$ of $C_{4} H_{10}=\frac{14 \mathrm{N}}{58} \times 10^{-3} \mathrm{atoms}$

$1 \mathrm{mg}$ of $N_{2}=\frac{2 N \times 10^{-3}}{28}$ atoms

$1 \mathrm{mg}$ of $N a=\frac{N \times 10^{-3}}{23}$ atoms

$1 \mathrm{mL}=1 \mathrm{g} H_{2} O=\frac{3 N}{18}$ atoms

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