Find the charge in coulombs on 1g ion of `N^(-3)`

Options

A. `2.89 xx 10^(5)`
B. `2.10 xx 10^(3)`
C. `2.69 xx 10^(-5)`
D. `2.59 xx 10^(-4)`

Answer

A

Explanation

1g ion = (weight in grams of sum of atomic weight of atoms making the ion). Here `N^(3-)` has 14 amu so 1g ion is 14gm. Therefore `6.022 xx 10^(23)` ions has= `6.022 xx 10^(23) xx 1.6 xx 10^(-19) xx 3C= 2.89 xx 10^(5)C`