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

Answer: 4.74 moles

Explanation:

2LiBr+Ba/rightarrow BaBr_2+2Li

Moles of Ba=/frac{/text {given mass}}{/text {molar mass}}

Moles of Ba=/frac{325g}{137g/mol}=2.37 moles

According to given balanced equation,

1 mole of Barium gives 2 moles of Li

Thus 2.37 moles of Barium gives=/frac{2}{1}/times 2.37=4.74 moles

Thus 4.74 moles of lithium will be produced by 135 g of barium.