Giải thích các bước giải: 

\begin{array}{|c|c|c|}\hline \text{CTPT}&\text{Hợp chất}&\text{Đọc tên}&\text{Phân tử khối}\\\hline \text{7. }SO_2&\text{Oxit}&\text{Lưu huỳnh đioxit}&\text{64 đvC}\\\hline \text{8. }Fe(OH)_2&\text{Bazơ}&\text{Sắt (II) hidroxit}&\text{90 đvC}\\\hline \text{9. }Zn(NO_3)_2&\text{Muối}&\text{Kẽm nitrat}&\text{189 đvC}\\\hline \text 
  {10. MgO}&\text{Oxit}&\text{Magie oxit}&\text{40 đvC}\\\hline \text 
  {11. }Al_2(SO_4)_3&\text{Muối}&\text{Nhôm sunfat}&\text{342 đvC}\\\hline \text 
  {12. }Fe(NO_3)_3&\text{Muối}&\text{Sắt (III) nitrat}&\text{242 đvC}\\\hline \text 
  {13. }CaSO_4&\text{Muối}&\text{Canxi sunfua}&\text{136 đvC}\\\hline \text 
  {14. }Ca(OH)_2&\text{Bazơ}&\text{Canxi hidroxit}&\text{74 đvC}\\\hline \text 
  {15. HCl}&\text{Axit}&\text{Axit clohidric}&\text{36,5 đvC}\\\hline \text 
  {16. }Ba_3(PO_4)_2&\text{Muối}&\text{Bari phophat}&\text{602 đvC}\\\hline \text     
  {17. }HNO_3&\text{Axit}&\text{Axit nitric}&\text{63 đvC}\\\hline \text 
  {18. }CO_2&\text{Oxit}&\text{Cacbon đioxit}&\text{44 đvC}\\\hline \text 
  {19. }NO_2&\text{Oxit}&\text{Nitơ đioxit}&\text{46 đvC}\\\hline \text 
  {20. }Cu(OH)_2&\text{Bazơ}&\text{Đồng (II) hidroxit}&\text{98 đvC}\\\hline \text 
  {21. }H_2SO_4&\text{Axit}&\text{Axit sunfuric}&\text{98 đvC}\\\hline \text 
  {22. }Na_2S&\text{Muối}&\text{Natri sunfua}&\text{78 đvC}\\\hline \text 
  {23. }H_3PO_4&\text{Axit}&\text{Axit photphoric}&\text{98 đvC}\\\hline \text 
  {24. }K_3PO_4&\text{Muối}&\text{Kali photphat}&\text{212}\\\hline \text 
  {25. }CaCO_3&\text{Muối}&\text{Canxi cacbonat}&\text{100 đvC}\\\hline \text 
  {26. }CuCO_3&\text{Muối}&\text{Đồng (II) cacbonat}&\text{124 đvC}\\\hline \text 
  {27. CuO}&\text{Oxit}&\text{Đồng (II) oxit}&\text{80 đvC}\\\hline \text 
  {28. }P_2O_5&\text{Oxit}&\text{Điphotpho pentaoxxit}&\text{142 đvC}\\\hline \text 
  {29. }H_2SO_3&\text{Axit}&\text{Axit sunfurơ}&\text{82 đvC}\\\hline \text 
  {30. }BaSO_3&\text{Muối}&\text{Bari sunfit}&\text{217 đvC}\\\hline\end{array}

Đáp án:

Giải thích các bước giải: