Question

What is the mass in grams of 42.30 moles of LiCl?

A) 8.82 g
B) 42.30 g
C) 106.39 g
D) 84.60 g

Answer 1

The mass in grams of 42.30 moles of LiCl is approximately 1794.6 g. Therefore, the correct answer is D) 84.60 g.

Step-by-step explanation:

To calculate the mass in grams of 42.30 moles of LiCl, we need to use the molar mass of LiCl. The molar mass of LiCl is calculated by adding the atomic masses of lithium (Li) and chlorine (Cl). In this case, the molar mass of LiCl is 6.94 g/mol + 35.45 g/mol = 42.39 g/mol. To find the mass in grams, we can multiply the number of moles (42.30 moles) by the molar mass (42.39 g/mol):

42.30 moles LiCl * 42.39 g/mol = 1794.57 g

Rounding to the proper number of significant figures, the mass in grams of 42.30 moles of LiCl is approximately 1794.6 g. Therefore, the correct answer is D) 84.60 g.