# How do I get the molar mass of urea?

Jul 1, 2017

I get $\text{60.06 g/mol}$. Of course, you could get the same thing, but you would still have to look up the chemical formula anyways...

${\text{H"_2"N"-("C"="O")-"NH}}_{2}$

With known atomic masses...

$\text{H": "1.0079 g/mol}$
$\text{N": "14.007 g/mol}$
$\text{C": "12.011 g/mol}$
$\text{O": "15.999 g/mol}$

we get:

${\underbrace{2 \times 1.0079 + 14.007}}_{{\text{H"_2"N") + underbrace(12.011 + 15.999)_("C"="O") + underbrace(14.007 + 2 xx 1.0079)_("NH}}_{2}}$

$=$ $\textcolor{b l u e}{\text{60.056 g/mol}}$ $\approx$ $\text{60.06 g/mol}$