Question

nitrogen react with hydrogen to give ammonia. calculate the volume of the ammonia gas formed when nitrogen react with 6 liters of hydrogen. all volume measured at stp.

Answer 1

At STP, 1 mole of ANY gas occupies a volume of 22.4 L. 

6 L H2 x (1 mole H2 / 22.4 L H2) = 0.268 moles H2 

The balanced equation tells us that it takes 3 moles of H2 to produce 2 moles of NH3. 

0.268 moles H2 x (2 moles NH3 / 3 moles H2) = 0.179 moles NH3 produced 

0.179 moles NH3 x (22.4 L NH3 / 1 mole NH3) = 4.0 L NH3