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phuongquynhn0209
2 năm trước
Nhận xét nào sau đây là đúng? A: Phản ứng của H2 với O2 gây nổ mạnh nếu tỉ lệ thể tích là 1:1. B: Trong các phản ứng H2 thể hiện tính oxi hóa. C: H2 là chất khí nhẹ nhất trong tất cả các chất khí. D: H2 không phản ứng với CuO khi đun nóng.
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