8.5g sample of NH3 on oxidation produces 4.5g of NO.Calculate the percent yield.?

Question

Reaction: 4 NH3+5 O2>>>4 NO + 6 H2O

Answer 1

First we will calculate the potential yield assuming 100% of the NH3 is converted to NO.  The calculation will be done in gram-moles (gmol).

8.5/17 = 0.5 gmol

According to the chemical equation the number of moles of NH3 and NO are equal.

Now we calculate how much NO was actually produced in gmols.

4.5/30 = 0.15 gmols

Now we can calculate the actual yield.

0.15/0.5 * 100% = 30%

The answer is 30%.