Em tham khảo!
Câu 4.
$\text{Muối ăn: NaCl(Natri Clorua)}$
$\text{Nước: H2O}$
$\text{Đường mía: C12H22O11(Sacaroza)}$
$\text{Khí Cacbonic: CO2(Cacbon Dioxit)}$
$\text{Thuốc tím: KMnO4(Kali Pemanganat)}$
$\text{Khí metan: CH4}$
Câu 5
$\text{Sắt: Fe, NTK: 56}$
$\text{Đồng Cu, NTK: 64}$
$\text{Nhôm: Al, NTK:27}$
$\text{Kẽm:Zn, NTK:65}$
$\text{Bari: Ba, NTK: 137}$
Câu 6
$\text{Nito: N, NTK: 14}$
$\text{Oxi: O, NTK:16}$
$\text{Cacbon: C, NTK:12}$
$\text{Lưu huỳnh: S, NTK:32}$
$\text{Photpho: P, NTK: 31}$
#TRANPHAMGIABAO