a solution of sulfiric acid is 40% H2SO4 by mass and it has a density of 1.30g/ml at 25 degrees Celcious. the molarity of this solution is....?

Answer 1

40% H2SO4 means 40 g H2SO4/100 g solution
Convert 40 g to moles. moles = grams/molar mass.
Convert 100 g soln to volume using the density, then M = moles/L of soln.