Question

You have 4 moles of Li2S. How many grams are present? a 120 b 11.5c 46 d 184

Answer 1

In order to find th mass in grams of 4 moles of Li2S, we need to use its molar mass, 45.95g/mol and the provided number of moles, the calculation is:

45.95g = 1 mol of Li2S

x grams = 4 moles of Li2S

x = 183.8 grams of Li2S in 4 moles, which can be rounded to184 grams, letter D