Question

calculate the amount of h2 which is left unreacted in the given reaction 2h2 +o2 =2h2o if 8 gm of h2 is mixed with 16gm of o2?​

Answer 1

ans should be 3 mole....

1 mole of oxygen reacts with 2 mole of  hydrogen

So, 0.5 moles of oxygen react with = \frac{2}{1}\times 0.5=1.012×0.5=1.0 mole of  hydrogen

Oxygen is considered as a limiting reagent because it limits the formation of product and  is the excess reagent.Hydrogen is the excess reagent and (4-1)= 3 moles of hydrogen will remain unreacted.

Answer 2

Answer:

6gm of h2 will be left

hope it is correct