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cho 48 g fe2(so4)3 vao m g dd H2SO4 9.8%sau khi phan ung hoan toan thu duoc dung dich X co khoi luong 474 g .Nong do phan tram cac chat tan trong dung dich X la
A. 23
B 17.8
C 12.66
D 15
A. 23
B 17.8
C 12.66
D 15