Question

Calculate the final concentration of
a. 4.0 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0L
b. Water is added to 0.35L of a 6.0M KOH solution to make 2.0L of a diluted KOH solution.
c.A 20.0 mL sample of 8.0% (m/v)NaOH is diluted with water so that the final volume is 200.0mL.
d. A 6.0mL sample of 50.0% (m/v) acetic acid HC2H3O2 solution is added to water to give a final volume of 25mL. pls help even just the formula on how to solve it please.
I think all of these can be done with c1v1 = c2v2
c = concn
v = volume
thanks DrBob222 i already figure out how to do it

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