Question

1. in a lab, a technician measures out 2.05 g of a compound which was found to be 0.720 moles. what is the molar mass of this compound? 1.48 g/mol 1.33 g/mol 0.351 g/mol 2.85 g/mol

Explanation:

Step1: Recall molar mass formula

The formula for molar mass $M$ is $M=\frac{m}{n}$, where $m$ is the mass and $n$ is the number of moles.

Step2: Substitute given values

Given $m = 2.05\ g$ and $n=0.720\ mol$. Then $M=\frac{2.05\ g}{0.720\ mol}$.

Step3: Calculate the molar mass

$M=\frac{2.05}{0.720}\ g/mol\approx 2.85\ g/mol$.

Answer:

2.85 g/mol