20 multiple choice 5 points determine the empirical formula of a compound containing 45.8% sulfur and the…

20 multiple choice 5 points determine the empirical formula of a compound containing 45.8% sulfur and the remainder fluorine. s₂f₃ s₃f₂ sf₂ s₂f sf

20 multiple choice 5 points determine the empirical formula of a compound containing 45.8% sulfur and the remainder fluorine. s₂f₃ s₃f₂ sf₂ s₂f sf

Answer

Explanation:

Step1: Assume 100g of the compound

If we assume 100g of the compound, then the mass of sulfur ($S$) is $45.8g$ and the mass of fluorine ($F$) is $100 - 45.8=54.2g$.

Step2: Calculate the moles of each element

The molar - mass of sulfur ($S$) is $M_S = 32.07g/mol$, and the number of moles of sulfur $n_S=\frac{45.8g}{32.07g/mol}\approx1.43mol$. The molar - mass of fluorine ($F$) is $M_F = 19.00g/mol$, and the number of moles of fluorine $n_F=\frac{54.2g}{19.00g/mol}\approx2.85mol$.

Step3: Find the mole - ratio

Divide each number of moles by the smaller number of moles. $\frac{n_S}{n_S}=\frac{1.43mol}{1.43mol} = 1$ and $\frac{n_F}{n_S}=\frac{2.85mol}{1.43mol}\approx2$.

Answer:

C. $SF_2$