74.5 g of metallic chloride contains 35.5g of chlorine. The equivalent mass of the metal is:a.) 19.5b.) 35.5c.) 39.0d.) 78.0

To find the equivalent mass of the metal in the metallic chloride, we need to determine the molar mass of the metal chloride and then find the mass of the metal in one mole of the compound.

Given information:
Mass of the metallic chloride (MCl) = 74.5 g
Mass of chlorine (Cl) = 35.5 g

To find the molar mass of MCl, we add the molar mass of chlorine (35.5 g/mol) to the unknown molar mass of the metal (M g/mol):

Molar mass of MCl = Molar mass of M + Molar mass of Cl
Molar mass of MCl = M + 35.5 g/mol

Now, we can set up an equation based on the given information:

74.5 g (MCl) = Molar mass of M + 35.5 g/mol

Solving for the molar mass of M:

Molar mass of M = 74.5 g (MCl) - 35.5 g/mol

Molar mass of M = 39.0 g/mol

The equivalent mass of the metal is 39.0 g/mol.

Therefore, the correct answer is option c.) 39.0.