What is the molarity of a solution made from 8.210 g K2CrO4 dissolved in enough water to make a 0.50L solution?
molarity = moles/L
how many moles do you have?
you have 0.5L, so double the moles to get the molarity
how many moles do you have?
you have 0.5L, so double the moles to get the molarity