How do you calculate the percentage composition of Iodine in NI_3?

Feb 28, 2016

The percent composition of iodine in nitrogen triioxide is 32.1506%~~32%".

Explanation:

In order to calculate the percent composition of an element in a compound, you need to divide the molar mass (MM) of the element by the MM of the compound then multiply by 100.

%"composition of element"=("MM of element")/("MM of compound")xx100

$\text{MM of Iodine=126.90447 g/mol}$
https://en.m.wikipedia.org/wiki/Iodine

$\text{MM of NI"_3="394.719 g/mol}$
https://en.m.wikipedia.org/wiki/Nitrogen_triiodide

Percent Composition of Iodine in Nitrogen Triiodide

%"composition I"=(126.90447 cancel"g/mol")/(394.719 cancel"g/mol")xx100="32.1506%"~~32%"