Question

Calculate the mass percent composition of nitrogen in co(nh2)2.

Answer 1

Answer : The percent composition of nitrogen in
`CO(NH_2)_2` is, 46.7 %

Explanation : Given,

Molar mass of C = 12 g/mole

Molar mass of H = 1 g/mole

Molar mass of O = 16 g/mole

Molar mass of N = 14 g/mole

First we have to calculate the molar mass of
`CO(NH_2)_2` .

Molar mass of glucose
`(CO(NH_2)_2` =
`1(12)+1(16)+2(14)+4(1)=60g/mole`

Now we have to calculate the mass percent composition of nitrogen in
`CO(NH_2)_2`.

As we now that there are 1 number of carbon atom, 4 number of hydrogen atoms, 1 number of oxygen atom and 2 number of nitrogen atoms.

The mass of nitrogen =
`2* 14=28g`

Formula used :

`\%\text{ Mass percent composition of nitrogen}=\frac{\text{Mass of nitrogen}}{\text{Molar mass of } CO(NH_2)_2}* 100`

Now put all the given values in this formula, we get:

`\%\text{ Composition of nitrogen}=(28)/(60)* 100=46.7\%`

Therefore, the percent composition of nitrogen in
`CO(NH_2)_2` is, 46.7 %

Answer 2

The mass percentage composition of nitrogen in CO(NH2)2 is 46 .7%

calculation

% mass = molar mass of nitrogen/ molar mass of Co(NH2)2

molar mass of nitrogen = 14 x2 = 28g/mol since there is two nitrogen atom in Co(NH2)2\

molar mass of CO(NH2)2 = 12 + 16 + (14 x2) +( 2 x2)= 60 g/mol

the % mass is therefore =28 / 60 x100 =46.7%