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melisa1 [442]
3 years ago
12

`One way to make ammonia is to synthesize it directly from elemental nitrogen and hydrogen (though this isn't that easy). The eq

uation for this reaction would be N2 + 3 H2 → 2 NH3. If you are able to stream in 7.0 g of N2, what would be the minimum amount of H2 in grams that would be required to completely react with this amount of N2?
A. 1.5 g
B. 0.5 g
C. 0.75 g
D. 3.0 g
E. none of the above
Chemistry
2 answers:
AnnyKZ [126]3 years ago
8 0

Answer:

The correct answer is option A.

Explanation:

N_2 + 3 H_2\rightarrow 2 NH_3

Moles of nitrogen gas = \frac{7.0 g}{28 g/mol}=0.25 mol

According to reaction, 1 mole of nitrogen reacts with 3 moles of hydrogen gas.

Then 0.25 moles of nitrogen gas will react with:

\frac{3}{1}\times 0.25 mol=0.75 mol of hydrogen gas.

Mass of 0.75 moles of hydrogen gas = 0.75 mol × 2 g/mol = 1.5 g

1.5 grams of hydrogen that would be required to completely react with this amount of nitrogen.

White raven [17]3 years ago
7 0

Answer:  A. 1.5 g

Explanation:

N_2+3H_2\rightarrow 2NH_3

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

\text{Number of moles of nitrogen}=\frac{7.0g}{28g/mol}=0.25 moles

According to stoichiometry:

1 mole of N_2 requires = 3 moles of H_2

Thus 0.25 moles of N_2 will require =\frac{3}{1}\times 0.25=0.75moles of H_2

Mass of H_2 required =moles\times {\text {Molar mass}}=0.75mol\times 2g/mol=1.5g

The minimum amount of H_2 in grams that would be required to completely react with this amount of N_2 is 1.5 grams.

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