Câu 1:
CaCl2; \(PTK_{CaCl_2}=40+35,5.2=111\left(đvC\right)\)
Na2O; \(PTK_{Na_2O}=23.2+16=62\left(đvC\right)\)
Al2S3; \(PTK_{Al_2S_3}=27.2+32.3=177\left(đvC\right)\)
Al(OH)3; \(PTK_{Al\left(OH\right)_3}=27+\left(16+1\right).3=78\left(đvC\right)\)
Na2CO3; \(PTK_{Na_2CO_3}=23.2+12+16.3=106\left(đvC\right)\)
Na3PO4; \(PTK_{Na_2PO_4}=23.2+31+16.4=141\left(đvC\right)\)
Al2O3; \(PTK_{Al_2O_3}=27.2+16.3=102\left(đvC\right)\)
Zn(NO3)2; \(PTK_{Zn\left(NO_3\right)_2}=65+\left(14+16.3\right).2=189\left(đvC\right)\)
K2SO4; \(PTK_{K_2SO_4}=39.2+32+16.4=174\left(đvC\right)\)
Câu 2:
Sai:
- K(SO4)2: K2SO4
- CuO3: CuO
- Zn(OH)3: Zn(OH)2