Question

Fall19 Section 8 Course Home <Assignment Ch 7 Item 2 Hydrobromic acid dissolves sold iron according to the following reaction: Fe(s) + 2 HBr(aq) → FeBrs (aq) + H (9) Part A pure iron bar on a padlock? What mass of HBring) would you need to dissolve a 3.1 - Express your answer using two significantlig m9. 03 Correct Significant Figures Feedback: Your answer 8 required for this part was other rounded differently or use Part B What mass of H, would be produced by the complete reaction of the iron bar? Express your answer using two significant figures. AEO ? Suomi Request Answer MacBook Air

Answer 1

Part B : m = 0.11 g

Explanation

Part B

mass Fe reacted = 3.1 g

moles Fe reacted = (mass Fe reacted) / (molar mass Fe)

moles Fe reacted = (3.1 g) / (55.845 g/mol)

moles Fe reacted = 0.0555 mol

moles H₂ produced = (moles Fe reacted) * (1 mole H₂ / 1 mole Fe)

moles H₂ produced = (0.0555 mol) * (1 / 1)

moles H₂ produced = 0.0555 mol

mass H₂ produced = (moles H₂ produced) * (molar mass H₂)

mass H₂ produced = (0.0555 mol) * (2.016 g/mol)

mass H₂ produced = 0.11 g