8.8 g of iron(II) sulphide reacts completely with excess dilute hydrochloric acid. Calculate the volume of hydrogen sulphide evolved, measured at 18 º C and 729 mmHg pressure.

Answer 1

1. Calculate moles of H2S from Rxn
2. Cal. Vol H2S at STP = moles H2S x 22.4 l/mole at STP
3. Convert Vol H2S at STP to Vol at 18C & 729 mmHg using Ideal Gas Law
Ans => 2.489 Liters H2S