Question

The mass to charge ratio (m/e) for a cations is $1.5\times {10}^{-8}kg/C$. What is the mass of this atom?

• A. $2.4\times {10}^{-19}g$
• B. $2.4\times {10}^{-27}g$
• C. $2.4\times {10}^{-24}g$
• D. None of these

Answer 1

Answer: (B)

$2.4\times {10}^{-27}g$

The mass to charge ratio is

$\frac{m}{e}=1.5\times {10}^{-8}kg/c$

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

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

$=2.4\times {10}^{-27}g$

So, the correct option is $B$