find the mass of a reactant using daltons law of

Question

Find the mass of a reactant using Dalton's law of partial pressures, ideal gas law, and stoichiometry.

1.A piece of sodium metal reacts completely with water as follows:

2Na(s) + 2H₂O(1) → 2NaOH(aq) + H₂(g)

The hydrogen gas generated is collected over water at 25.0^oC. The volume of the gas is 246 mL measured at 1.00atm. Calculated the number of grams of sodium used in the reaction.(vapour pressure of water at 25^oC = 0.0313 atm)

2.A Sample of Zinc metal reacts completely with an excess of hydrochloric acid:

Zn(s) + 2HCL→ ZnCL₂ + H₂ (g)

The Hydrogen gas produced is collected over water at 25.0^oC using an arrangement similar to that shown . The volume of the gas is 7.80L and the pressure is 0.980atm. Calculate the amount of zinc metal in grams consumed in the reaction.(Vapor pressure of water at 25^oC-23.8mmHg)