Determine the number of grams H₂ formed when 250.0 mL of 0.743 mol L^-1 HCl solution reacts with 3.41 × 10²³ atoms of Fe according to the following reaction:
2HCl(aq) + Fe(s) → H₂(g) + FeCl₂(aq)

Question

Quizplus · Accepted Answer

First, calculate moles of HCl: 0.250 L * 0.743 mol/L = 0.18575 mol HCl. The reaction requires 2 moles of HCl per mole of H2, so moles of H2 = 0.18575 / 2 = 0.092875 mol. Calculate moles of Fe: 3.41 × 10^23 atoms / 6.022 × 10^23 atoms/mol = 0.566 mol Fe. Fe is in excess, so HCl limits the reaction. Moles of H2 = 0.092875 mol. Mass of H2 = 0.092875 mol * 2.016 g/mol = 0.187 g.

Determine the Number of Grams H2 Formed When 250

Determine the Number of Grams H₂ Formed When 250