For all of these just follow the definition that M = mols/L solution.
a. mols NaCl = grams NaCl/molar mass NaCl
Then M = mols L = ?
b. M = mols/L. You know mols and M, solve for L.
c. Convert 0.08g to mols. mols = grams/molar mass = ?
That many mols in 0.1 L means ? mols ethanol in 1 L? That gives you M.
Calculate the molar concentration for each of the following.
a)The concentration of a brine solution containing 225 g for pure sodium chloride dissolved in 4.00 L of solution.
b)The volume that must be added to 4.2 mol of magnesium chloride to make a 0.045 M solution.
c)The concentration of ethanol that is considered the legal limit when driving: 0.08 g of C2H6O(1) in 100 mL of blood.
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