Question

The mass to charge ratio (m/e) for a univalent cation is 1.5 $\times$ ${10}^{-8}$ Kg/c. Find mass of the atom.

• A. 2.4 $\times$ ${10}^{-24}$g
• B. 2.4 $\times$ ${10}^{-27}$g
• C. 2.4 $\times$ ${10}^{-24}$g
• D. 2.4 $\times$ ${10}^{-19}$g

Answer 1

The correct option is C

2.4 $\times$ ${10}^{-24}$g

$\frac{e}{m}$ = $\frac{1}{1.5\times {10}^{-8}\times {10}^3}$ $\frac{c}{g}$

m = 1.6 $\times$ ${10}^{-19}$ $\times$ 1.5 $\times$ ${10}^{-8}$ $\times$ ${10}^3$g

2.4 $\times$ ${10}^{-24}$g