Molarity and Moles

Q.
How many moles are there in 500cm3 of 5.0M lithium bromide, NaBr, solution?
A.
Moles = Molarity x Liters
or
n = VM

1 cm^3 = 1 mL, 1 L = 1000 mL, and M = mol/L
500 cm^3 = 500 mL = 0.500 L

moles = (5.0 mol/L)(0.500 L) = 2.5 moles NaBr

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