Jawabanmu

2014-05-07T18:09:18+07:00
menurutku
Massa C = (Ar C / Mr CaCO3) x massa CaCO3
              = 12/100 x 50 gram = 6 gram
                 jadi massa C 6 gram
Kadar C = massa C / massa CaCO3 x 100%
              = 6/50 x 100 % = 12%