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"#. 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"_2#

With known atomic masses...

#"H": "1.0079 g/mol"#
#"N": "14.007 g/mol"#
#"C": "12.011 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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