5.0 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is false?
N₂(g) + 3 H₂(g) → 2 NH₃(g)

Question

5.0 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is false? N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

Quizplus · Accepted Answer

To determine the false statement, we first calculate the moles of nitrogen (N2) and hydrogen (H2) used in the reaction. The molar mass of N2 is 28 g/mol (14*2) and that of H2 is 2 g/mol (1*2). For 5.0 g of N2, moles = 5.0 g / 28 g/mol = 0.179 mol. For 5.0 g of H2, moles = 5.0 g / 2 g/mol = 2.5 mol. The stoichiometry of the reaction is 1 N2 : 3 H2, so 0.179 mol of N2 would require 0.537 mol of H2 (0.179 mol * 3). Since we have 2.5 mol of H2, which is more than needed, H2 is the excess reactant, making statements B and C true. To find the theoretical yield of NH3, we use the moles of N2 (limiting reactant) and the stoichiometry of the reaction. Since 1 mol of N2 produces 2 mol of NH3, 0.179 mol of N2 will produce 0.358 mol of NH3. The molar mass of NH3 is 17 g/mol (14 + 1*3), so the mass of NH3 produced is 0.358 mol * 17 g/mol = 6.086 g, which is approximately 6.1 g, making statement D true. Therefore, statement A is false because, with the given amounts, hydrogen would not have 2.8 grams left over after the reaction.

50 G of Nitrogen Is Reacted with 5