In the following balanced reaction: 2Al(s) + 6HCl(aq) → 2AlCl3(s) + 3H2(g) 2.32 g of Al react with excess HCl to produce hydrogen gas which is passed through water and collected at 25oC and a barometric pressure of 7.40 x 102 Torr. The vapour pressure of water at 25oC is 23.770 Torr.

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