you need to make a 3.5 Molar solution of Ca(OH)2, however, you only want to make 50ml of this Ca(OH)2 solution. How many grams of Ca(OH)2 will you need to weigh out and add to 50ml of water?
Mass=VolumeinLiters*Molarity*Molmass
Mass=VolumeinLiters*Molarity*Molmass