Hydrobromic acid dissolves solid iron according to the balanced equation: Fe(s) + 2 HBr(aq) → FeBr2(aq) + H2(g) How many grams of H2 would be produced by dissolving 6.31g of iron?

0.342

0.228

0.114

4.38

1 Answer
Tom M.
May 12, 2018

0.226g

Explanation:

Using #"mass"=M_rxx"moles"#

#"moles of " Fe=6.31/55.8#
#=0.113" mol"#

From the equation, one mole of iron produces one mole of hydrogen gas.

#"moles of "H_2=0.113" mol"#

#"mass "H_2=0.113xx2#

#=0.226"g"#

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