First find the molarity of the concentrated HNO3.
1.42 g/mL x 1000 mL x 0.0704 x (1 mol/63g) = ? M.
Then use the dilution formula of
mL1 x M1 = mL2 x M2
33.4 x ?M = 2000 mL x M2.
Solve for M2.
Calculate the molarity of a solution made by adding 33.4 mL of concentrated nitric acid (70.4 % by mass, density 1.42 g/mL) to some water in a volumetric flask, then adding water to the mark to make exactly 2000 mL of solution. (It is important to add concentrated acid or base to water, rather than the other way, to minimize splashing and maximize safety.)
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