pake cara yaa tlng jwb yaaa!! nmr 19 sama 20

19][
m = 30 gr
V = 300 mL = 0,3 L
C = __?

konsentrasi
C = m / V
C = (30 gr) / (0,3 L)
C = 100 gr/L ← jwb


20][
m = 20+40 = 60 gr
V = 200 mL
C = __?

konsentrasi
C = m / V
C = (60 gr) / (200 mL)
C = 0,3 gr/mL ← jwb