How many grams of hydrogen are needed to react with 1.40 g of nitrogen to produce ammonia?

Write a balanced chemical reaction:

N2 + 3H2 ==> 2NH3

Looking at the mole ratios in this balanced equation you can see it takes 3 moles H2 to make 2 moles NH3.  So, next calculate the moles of NH3 represented by 1.80 g and then convert to moles of H2 needed:

moles of NH3 = 1.80 g x 1 mole/17 g = 0.106 moles NH3

Moles H2 needed = 0.106 moles NH3 x 3 moles H2/2 moles NH3 = 0.159 moles H2 needed

Grams H2 needed = 0.159 moles x 2 g/mole = 0.318 grams H2 needed

Explanation:

Well being that almost 71% of the earth is water and water is what we depend on. We would all die. And the earth would be very dry and it would just wipe out the existence of humans. You would not be able to drive cars either because gas is like water so yea we would be extinct.

Hope this helps