Question

A giant molecule contains 0.25% of a metal whose atomic weight is 59. Its molecule contains one atom of metal. Calculate its minimum molecular weight?

• A. 5900
• B. 23600
• C. 11800
• D. $\frac{100\times 59}{0.4}$

Answer 1

The correct option is B 23600

1 mol weights $59g$

1 atoml weights $\frac{59}{N_A}$

$0.25\%$ of $x$ weights $\frac{59}{N_A}$

$\Rightarrow x=\frac{59\times 100}{N_{A}0.25}$

$\therefore$ Molecular weight $=N_{A}x$

$=\frac{59\times 100}{0.25}\times 100$

$=23600$