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2024-06-14 14:15:21
- NTK của nguyên tố R là:
R = 2x 16 = 32 (đvC)
a) R là Lưu huỳnh. kí hiệu S
b) Số p của S là 16
- Vì số p = số e nên số e là 16 e
2024-06-14 14:15:07
2024-06-14 14:14:16
a, H2SO4
PTK = 2MH + MS + 4.MO = 98 dvC
b, Al2O3
PTK= 2.MAl + 3MO = 102 dvC
2024-06-14 14:13:30
Khí Clo do nguyên tố Cl tạo nên là đơn chất
Khí Ozon do nguyên tố O tạo nên là đơn chất
Khí Hidro do nguyên tố H tạo nên là đơn chất
còn lại là hợp chất