b
\(4.6 \times 10^{22}\) પરમાણુઓનુ દળ \(=13.8\,g\)

\(\therefore 6 \times 10^{23}\) પરમાણુઓનું દળ \(=(?)\)

\(=\frac{6 \times 10^{23} \times 13.8}{4.6 \times \times 10^{22}}\)

\(=180\,g\)

\(\therefore\) તત્વનુ પરમાણ્વીય દળ \(=180\,g\,mol ^{-1}\)