Question

No 7 bisa poin besar, jangan spam

Answer 1

Al2(SO4)3
jumlah atom Al = 2 , S = 3 , O = 12
mr Al2(SO4)3 =342 , Ar Al = 27 , S=32, O=16

mol Al = 2(27) / 342  x 1 mol = 0,16 mol
mol S = 3(32) / 342  x 1 mol = 0,28 mol
mol O = 12(16) / 342  x 1 mol = 0,56 mol