January 2019 1 18 Report
7.Apa yang diperlukan agar layang-layang dapat terbang ke udara?
8.Untuk apa gas tabung berisi karbondioksida terdapat di gedung dan kantor-kantor?
9.Shulphuric acid dan sodium bikarbonat jika dicampur akan menghasilkan gas apa?
#Benar_Pahala,kak.
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