Calculate the mass fraction of nitrogen in ammonia. How many liters of nitrogen and hydrogen

| September 8, 2021 | education

Calculate the mass fraction of nitrogen in ammonia. How many liters of nitrogen and hydrogen are needed to obtain 134.4 liters of ammonia? (conditions are normal). What is the importance of ammonia for agriculture

# 1. Ammonia formula NH3;

Mr (NH3) = 17 g / mol;

ω (N) = Mr (N) / Mr (NH3) * 100% = 14/17 * 100% = 82.4%.

No. 2. The reaction equation is N2 + 3H2 = 2NH3;

n (NH3) = V / Vm = 134.4 / 22.4 = 6 mol;

n (N2) = 0.5n (NH3) = 6 * 0.5 = 3 mol;

V (N2) = n (N2) * Vm = 3 * 22.4 = 67.2 liters.

n (H2) = 1.5n (NH3) = 1.5 * 6 = 9 mol;

V (H2) = n (H2) * Vm = 9 * 22.4 = 201.6 liters.

Answer: 67.2 liters and 201.6 liters.

No. 3. Ammonia is used in the production of nitrogen-containing fertilizers (nitrates). Nitrogen fertilizers are needed for active plant growth and higher yields.



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