Answer
60 amu
Work Step by Step
In 1 molecule of urea there are:
2 atoms of nitrogen- 14 amu each
4 atoms of hydrogen- 1 amu each
1 atom of carbon- 12 amu each
1 atom of oxygen- 16 amu each
When the number of atoms are multiplied by their atomic weights and added together the final mass of 1 molecule of urea is 60 amu.