Jawapan

2016-07-09T13:55:04+08:00
Its a type of chemical catalyst that used for activate energy level form 5 topic 1
minta maaf saya baru darjah tiga jadi saya tak faham bahasa Inggeris
2016-07-12T20:33:22+08:00
A colourless viscous unstable liquid with strong oxidizing properties, used in some disinfectants and bleaches.
saya baru sekolah rendah darjah 1 tidak faham