A technician produced H_2 gas by reacting zinc (Zn) with sulfuric acid (H_2SO_4).The reaction was : 2Zn (s) + H_2SO_4 (aq). —>Zn_2SO_4 (aq) + H_2. He collected the hydrogen in a flask by water displacement. Atmospheric pressure was 737.2 torr and room temperature was 25.0^degree . What was the pressure of H_2 in the flask?

THE MOLAR MASS OF XCL2 IS 400 g/mol

THE MOLAR MASS OF YCL2 IS 250 g/mol.

Explanation:

We calculate the molar mass of XCL2 and YCL2 by bringing to mind the formula for molar mass when mass and amount or number of moles of the substance is given.

Number of moles = mass / molar mass

Molar mass = mass / number of moles.

For XCL2,

mass = 100 g

number of mole = 0.25 mol

So therefore, molar mass = mass / number of moles

Molar mass = 100 g / 0.25 mol

Molar mass = 400 g/mol.

For YCL2,

mass = 125 g

number of mole = 0.50 mol

Molar mass = 125 g / 0.50 mol

Molar mass = 250 g/mol.

So therefore, the molar mass of XCL2 and YCL2 IS 400 g/mol and 250 g/mol respectively.