Chlorine gas will react with 3,450mL of hydrogen gas to yield what mass of hydrogen chloride gas at 25.0oC and 1.13atm?

Answer 1

Cl₂ + H₂ ==> 2HCl ... balanced equation

Find moles H₂ being used:

PV = nRT

n = PV/RT = (1.13 atm)(3.450 L)/(0.0821 Latm/Kmol)(298K)

n = 0.159 moles H₂ being used

Assuming Cl₂ is not limiting, then you have...

0.159 mols H₂ x 2 mol HCl/mol H₂ x 36.5 g HCl/mol HCl = 11.6 g HCl