Question

Select the correct answer.

Given:

2LiBr + Ba → BaBr2 + 2Li

In this chemical reaction, 325 grams of barium (Ba) react completely. How many moles of lithium (Li) are produced?

A.
1.18 mol
B.
2.37 mol
C.
4.73 mol
D.
16.4 mol
E.
32.9 mol

Answer 1

Ans: 4.73 moles

Given reaction:

2LiBr + Ba → BaBr2 + 2Li

Mass of Ba = 325 g

Atomic mass of Ba = 137.32 g/mol

# moles of Ba = 325/137.32 = 2.368 moles

Based on the reaction stoichiometry:

1 mole of Ba produces 2 moles of Li

Therefore, 2.368 moles of Ba will produce, 2.368*2 = 4.736 moles