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phamluuhuuha
2 năm trước
1. Công thức phân tử của cao su thiên nhiên là A. $(C_2H_4)n$ B. $(C_4H_8)n$ C. $(C_4H_6)n$ D. $(C_5H_8)n$ 2. Số mol $H_2$ tối đa tác dụng với 2mol triolein là A. 1 B. 6 C. 3 D. 2
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