estimate the mass of BaSO4 that will be produced when a 100ml of a 2M solution of Ba(NO3)2 in water is added toa 100ml of a 2M solution of NaSO4 in water

Answer 1

you havea .2Moles Ba(NO3)2

Ba(NO3)2+Na2SO4>>BaSO4 + ...

You have .2 moles of Na2SO4
you have .2 moles of Ba(NO3)2

so you must be getting .2 moles of barium sulfate.

masss=.2*molmassBaSO4