posted by Connor .
How many milliliters of an aqueous solution of 0.219 M magnesium bromide is needed to obtain 10.1 grams of the salt ?
1. Divide 10.1g MgBr2 by the fomrula mass of MgBr2 to get the moles
2. Substitute the value for moles and molarity into:
moles = molarity x liters
Solve for liters and then convert the liters to milliliters.