Answer to Question #120591 in Inorganic Chemistry for Julian Staffieri

Question #120591
8. When nitrogen gas reacts with hydrogen gas, ammonia gas is formed. If 0.95 g of hydrogen gas react with 4.75 g of nitrogen gas, which reactant will be the limiting reactant?
1 point
a. nitrogen gas
b. hydrogen gas
c. ammonia gas
d. Neither will be the limiting reactant.
e. The excess reactant must be determined experimentally.
Expert's answer

The balanced equation is:

3H2 + N2 --> 2NH3

n (H2) = 0.95g / 2.02g/mol = 0.47 mol

n (N2) = 4.75g / 28.02g/mol = 0.17 mol

The actual mole ratio is H2 : N2 = 0.47 : 0.17 = 2.76.

According to the equation, the H2 : N2 ratio equals 3. Therefore, H2 is the limiting reactant.

Answer: b) - Hydrogen gas.

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