Đáp án:

\begin{array}{|c|c|c|c|}\hline \text{CTPT}&\text{hợp chất}&\text{đọc tên}&\text{phân tử khối}\\\hline \text{29. Mg(NO3)2}&\text{muối trung hòa}&\text{magie nitrat}&\text{148 (đvC)}\\\hline \text{30 AlPO4}&\text{Muối trung hòa}&\text{nhôm photphat}&\text{122 (đvC)}\\\hline \text{31. Na2SO4}&\text{muối trung hòa}&\text{natri sunfat}&\text{142 (đvC)}\\\hline \text{32. Na2SO3}&\text{muối trung hòa}&\text{natri sunfit}&\text{126 (đvC)}\\\hline \text{33. H2SO3}&\text{axit có ít oxi}&\text{axit sunfuro}&\text{82 (đvC)}\\\hline \text{34. H2SO3}&\text{axit có ít oxi}&\text{axit sunfuro}&\text{82 (đvC)}\\\hline \text{35. Al2(SO4)3}&\text{muối trung hòa}&\text{nhôm sunfat}&\text{342 (đvC)}\\\hline \text{36. CO2}&\text{oxit axit}&\text{cacbon đioxit}&\text{44 (đvC)}\\\hline \text{37. CaCO3}&\text{muối trung hòa}&\text{canxi cacbonat}&\text{100 (đvC)}\\\hline \text{38. CaO}&\text{oxit bazơ}&\text{canxi oxit}&\text{56 (đvC)}\\\hline \text{39. SO2}&\text{oxit axit}&\text{lưu huỳnh đioxit}&\text{64 (đvC)}\\\hline \text{40. N2O5}&\text{oxit axit}&\text{đinitơ pentaoxit}&\text{108 (đvC)}\\\hline \text{41. Mg(OH)2}&\text{bazơ không tan}&\text{magie hiđroxit}&\text{60 (đvC)}\\\hline \text{42. Fe3(PO4)2}&\text{muối trung hòa}&\text{sắt (II) phtophat}&\text{358 (đvC)}\\\hline \text{43. Cu(NO3)2}&\text{muối trung hòa}&\text{Đồng nitrat}&\text{188 (đvC)}\\\hline \text{44. CuO}&\text{oxit bazơ}&\text{đồng (II) oxit}&\text{80 (đvC)}\\\hline \text{45.Zn3(PO4)2}&\text{muối trung hòa}&\text{kẽm photphat}&\text{385 (đvC)}\\\hline \text{46. Fe(OH)2}&\text{bazơ không tan}&\text{sắt (II hiđroxit}&\text{90 (đvC)}\\\hline \text{47. H2S}&\text{axit không có oxi}&\text{axit sunfuhiđric}&\text{34 (đvC)}\\\hline\end{array}