Question

How many moles of Lithium Fluoride will you need to add to 250.0 mL of water to make a 5.00 M solution?

Answer 1

1.25 mol LiF

Step-by-step explanation:

5.00 M solution means

5.00 mol LiF in 1 L solution=1000mL

x mol LiF in 250 mL

x = 5.00*250/1000 = 1.25 mol LiF