Question

calculate the percentage of nitrogen in urea show it adding all atomic weight

Answer 1

Explanation:

The formula of urea is NH2CONH2

Molar mass = 60.01 g/mol

Atomic mass of N = 14 and 

Number of atoms = 2

That means, 14 * 2= 28g/mol of urea

MW urea = 60.1 

%N = 100% x 28.0 g N / 60.1 g urea = 46.66 % N

Or 

%N= 28/60*100= 46.66 % N