Jawabanmu

2014-06-02T19:54:10+07:00
Ca(XO3)2 = 1 Ar Ca + 2Ar X + 6 Ar O
164. = 40 + 2ar X + 6(16)
164 = 136 + 2ar X
2ar X. = 28
ar X. = 28/2
X. = 14