Answer:
[tex]m = 2.72 \times 10^{-3} g[/tex]
Explanation:
total number of protons in 5 gram of total mass is given as
[tex]N = \frac{m}{m_p}[/tex]
here we have
[tex]N = \frac{5}{1.67262 \times 10^{-24}}[/tex]
[tex]N = 2.99 \times 10^{24}[/tex]
now to neutralize the charge we require same amount of negatively charge electrons
so we have
[tex]m = N(m_e)[/tex]
[tex]m = (2.99 \times 10^{24})(9.1 \times 10^{-28})[/tex]
[tex]m = 2.72 \times 10^{-3} g[/tex]
