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  • What is the percentage mass of N in a mixture of 0.5 mole NH3 and 1 mole Ca(NO3)2The tota

What is the percentage mass of N in a mixture of 0.5 mole NH3 and 1 mole Ca(NO3)2.

Option 1)  16.23%

Option 2)  12.17%

Option 3)  10.23%

Option 4)  20.28%

Answers (1)

best_answer

As we learnt in

Molar Mass -

The mass of one mole of a substance in grams is called its molar mass.

- wherein

 Molar mass of water = 18 g mol-1

 

Total moles of N = 0.5 + 2\times 1 = 2.5

Total mass of N = 2.5 \times 14 = 35

Total mass of mixture = 0.5\times 17 + 1\times 164 = 172.5g

\therefore Percentage = \frac{35 \times 100}{172.5} = 20.28\%

Posted by

avinash.dongre

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