Under appropriate conditions,nitrogen and hydrogen undergo a combination reaction to yield ammonia.Write the reaction and determine the mass of H₂ (g)required to completely react with 25.8 g of N₂. A)5.57 B)1.86 C)77.4 D)2.78 E)0.928

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The balanced chemical equation for the synthesis of ammonia (NH3) from nitrogen (N2) and hydrogen (H2) is: N2 + 3H2 → 2NH3. The molar mass of N2 is 28.02 g/mol and that of H2 is 2.02 g/mol. To find the mass of H2 required to react with 25.8 g of N2, we first convert the mass of N2 to moles: 25.8 g N2 * (1 mol N2 / 28.02 g N2) = 0.921 moles N2. Since the stoichiometry requires 3 moles of H2 for every mole of N2, the moles of H2 needed are 3 * 0.921 = 2.763 moles H2. Converting moles of H2 to grams: 2.763 moles H2 * (2.02 g H2 / 1 mol H2) = 5.58 g H2, which rounds to 5.57 g when considering significant figures.

Under Appropriate Conditions,nitrogen and Hydrogen Undergo a Combination Reaction to Yield