Question

If one million atoms of silver weigh $1.79\times 10^{-16}g$, the gram atomic weight of silver is

• A. $1.708$
• B. $107.8$
• C. $10.78$
• D. None of these

Answer 1

Answer: (B)

$1$ million $=10^6$
Thus $10^6$ atoms weigh $1.79\times 10^{-16}g$,
So $6.02\times 10^{23}$ atoms weigh
$=\frac{1.79\times 10^{-16}}{10^6}\times 6.023\times 10^{23}g$