Question

Question #cd962

Answer 1

`2.326xx 10^-23` `"g"`

Explanation:

I'll assume you meant a nitride ion...

We're asked to find the mass, in `"g"`, of one nitride ion, `"N"^(3-)`.

This is simply a charged nitrogen atom, which has gained three electrons from bonding. Recall that electrons have negligible mass compared to nucleons (protons and neutrons). This, the atomic mass of a nitride ion is essentially the same as the mass of a lone nitrogen atom.

According to a periodic table, the relative atomic mass of `"N"` is

`color(red)(14.007` `color(red)("amu"`

One atomic mass unit is `~~ 1.660 xx 10^-24` grams, so let's use dimensional analysis to find the mass in grams of a nitride ion:

`14.007cancel("amu")((1.660xx10^-24color(white)(l)"g")/(1cancel("amu"))) = color(blue)(2.326 xx 10^-23` `color(blue)("g"`