Needed Information Molar mass of Ba(OH)2 = 171.35 g/mol If 50.0 grams of Ba(OH), is dissolved in 750 g calculate %(m/m) Report answer to 3 significant figures (Did you pay very close attention to the equation for % (m/m)?) How many mL of H3PO, stock solution is needed to make 500.00 mL (volume of diluted sample) at a concentration of 0.250 M (concentration of diluted solution) if the concentration of the stock solution is 14.8 M? mL Report answer to 3 significant figures How many grams of Ba(OH)2 is need to make a 500.00 mL solution with a concentration of 0.250 M g Report answer to 3 significant figures (Did you pay very close attention to the the units of the volume given and the volume required for molarity?)