Nitrogen content in a sample of urea is 42.5%. What is percentage purity of urea in urea sample.?

Question

urea is (NH2CONH2),MOL.WT.=60)
-GIVE WHOLE CALCULATION PROCESS

Answer 1

the mass of nitrogen in urea is equal to 2*14= 28

So in pure urea ,the fraction of nitrogen would be 28/60 =0.4467= 46.67%

As you find only 42.5 % your purity is

42.5/46.67 =0.911= 91.1%

Answer 2

We can easily see....% of nitrogen in pure urea is...100*(28/60)=46.666667 %....but purity in the sample is 42.5 %...
therefore...by simple proportions...purity of given sample is...(100*42.5)/46.66667= 91.071 %

Answer 3

Urea Sample