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-Dominant- [34]
3 years ago
5

Ammonia is produced by the following reaction.

Chemistry
1 answer:
kati45 [8]3 years ago
4 0
The answer, as you appear to have guessed, is
A) 7.5 moles of hydrogen would be needed to consume the available hydrogen. 

The atomic mass of N2 is 2 x 14 = 28, so 70 grams is 2.5 moles. 
The ratio of N2 to H2 in the equation is 3 to 1, so 7.5 mol of hydrogen would be needed to consume the available nitrogen. 
7 grams of H2 is only about 3.5 moles. 
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