a sample contains 7.90 g c and 42.1 g s. you want to determine the empirical formula. how many moles of s…

a sample contains 7.90 g c and 42.1 g s. you want to determine the empirical formula. how many moles of s are in the sample? ? mol s do not round your answer.

a sample contains 7.90 g c and 42.1 g s. you want to determine the empirical formula. how many moles of s are in the sample? ? mol s do not round your answer.

Answer

Explanation:

Step1: Recall molar - mass formula

The molar - mass formula is $n=\frac{m}{M}$, where $n$ is the number of moles, $m$ is the mass in grams, and $M$ is the molar mass in g/mol. The molar mass of sulfur ($S$) is $M = 32.06\ g/mol$.

Step2: Calculate moles of S

We are given that the mass of sulfur $m = 42.1\ g$. Using the formula $n=\frac{m}{M}$, we substitute $m = 42.1\ g$ and $M=32.06\ g/mol$. So, $n=\frac{42.1}{32.06}$.

Answer:

$\frac{42.1}{32.06}$