Jawapan

2016-09-24T16:39:41+08:00
1. besi + sulfur = iron sulphide(pyrite)
2. plumbum + sulfur = lead suphide(galena)
nathakumaran, i cant find your another questions
wait i'll try my best ^-^
I will post it again Nabila husna
ok
I will post it as a picture