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massa pelarut = 400 gr = 0,4 Kg
massa terlarut = .................?
Penyelesaian :
* Mencari mol zat terlarut (H₂SO₄)
m = mol terlarut / massa pelarut
0,2 = mol terlarut / 0,4
mol terlarut = 0,2 x 0,4
mol terlarut = 0,08 mol
* Mencari massa zat terlarut (H₂SO₄)
massa = mol x Mr
massa = 0,08 x 98
massa = 7,84 gram
Karena x = massa zat terlarut, berarti nilai x = 7,84 gram