Barrons SAT Subject Test Chemistry, 13th Edition

19. (C) The molar mass of Ca(OH) 2 is Ca = 40, 2 O = 32, and 2 H = 2, which

added together equals 74 g/mol. If this is dissolved to make a 2 L solution,

there is only .5 mol in 1 L. So the molarity (M), the moles of solute in 1 L =

.5 M.