Calculate the percentage of nitrogen in Urea-28-46-18-85-

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Ways of Representing the Concentration of a Solution

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Question

Calculate the percentage of nitrogen in Urea.

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Solution

The correct option is C
46

We know Urea's molecular formula is $C O (N H_{2})_{2}$ .

The total mass would be 60g/mol.

We also know the mass of nitrogen is 28g/mol.

Therefore Percentage of nitrogen will be calculate using,

$P e r c e n t a g e o f N i t r o g e n = \frac{(M a s s o f n i t r o g e n) \times (100)}{M a s s o f u r e a}$

$P e r c e n t a g e o f N i t r o g e n = \frac{(28) (100)}{60}$

So the percentage of Nitrogen in urea comes around 46.66%

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