1/ Tính thể tích của hỗn hợp khí ( ở đktc) gồm 19,8 gam khí CO 2 ; 0,25 mol khí H 2 ; 1,5.10 23 phân tử Cl 2/ a) Có 8,51 gam kim loại Na là bao nhiêu mol ? có chứa bao nhiêu nguyên tử Na? b)Phải lấy bao nhiêu gam nguyên tử K để có số nguyên tử đúng bằng số nguyên tử Na? mình cần gấp các bạn giúp mình

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