Question

Which of the following contain maximum percentage of nitrogen
NH4NO3
NO2
(NH2)2CO
NH3

Answer 1

Urea

Ammonium cyanide

Ammonium carbonate

Ammonium nitrate

Answer :

B

Solution :

In Urea (NH2CONH2)(NH2CONH2)

% of nitrogen =2360×100=46.6%=2360×100=46.6%

In ammonium cyandie NH4CNNH4CN,

% of nitrogen =2844×100=63.6%=2844×100=63.6%

In ammonium carbonate, (NH4)2CO3(NH4)2CO3

% of nitrogen =2896×100=29.2%=2896×100=29.2%

In ammonium nitrate, (NH2)2NO3(NH2)2NO3,

% of nitrogen =4298×100=42.8%=4298×100=42.8%

Hence, ammonium cyanide contains maximum percentage of nitrogen by mass

Answer 2

Explanation:

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