Question

determine the mass in grams of 2.91 moles of licl

Explanation:

Step1: Find molar - mass of LiCl

The molar mass of Li (lithium) is approximately 6.94 g/mol and Cl (chlorine) is approximately 35.45 g/mol. So, the molar mass of LiCl is $6.94 + 35.45=42.39$ g/mol.

Step2: Calculate the mass

We use the formula $m = n\times M$, where $n$ is the number of moles and $M$ is the molar mass. Given $n = 2.91$ moles and $M = 42.39$ g/mol. Then $m=2.91\times42.39 = 123$ g.

Answer:

123