Question

A metal, M, of atomic weight 96 u reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 10.9 g sample of the salt is dissolved in 100.0 g of water (for water: Kb=0.512∘Cm−1); and the boiling point of the solution is found to be 374.61 K.

Find the formula of the salt. Assume complete dissociation of the salt in solution.

Express your answer as a chemical formula.

Answer 1

I found out it's MoF3

Answer 2

Did you work it or someone told you?