Unit 5 Quiz Review

Question

The experimental mass of the sulfur compound was found to be 291.39 g. Using the empirical formula that you determined to calculate the molecular formula for the compound. 

Empirical formula molar mass = _________g

 

Molecular formula Multiplier =	_________g	=
	_________g

Molecular Formula = S_____F_{_____________}

_{Please fill in the boxes with the correct answers and explain.}

Answer 1

SF6 was the empirical formula, right?

molar mass of SF6 = 32 + 6*19 = 146 g/mol = molar mass of empirical formula

291.39 / 146 = 2 = molecular formula multiplier

Molecular formula = S₂F₁₂