How do I get the molar mass of urea?

1 Answer
Truong-Son N.
Jul 1, 2017

By looking it up.

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

"H"_2"N"-("C"="O")-"NH"_2H2N−(C=O)−NH2

With known atomic masses...

"H": "1.0079 g/mol"H:1.0079 g/mol
"N": "14.007 g/mol"N:14.007 g/mol
"C": "12.011 g/mol"C:12.011 g/mol
"O": "15.999 g/mol"O:15.999 g/mol

we get:

underbrace(2 xx 1.0079 + 14.007)_("H"_2"N") + underbrace(12.011 + 15.999)_("C"="O") + underbrace(14.007 + 2 xx 1.0079)_("NH"_2)

= color(blue)("60.056 g/mol") ~~ "60.06 g/mol"

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