1)H2O

PTK=1×2+16=18đvC

2)H2PO4

PTK= 1×2+31+16×4=98đvC

3)MgSO4

PTK=24+32+16×4=120đvC

4)CuO

PTK=64+16=80đvC

5)FeCl2

PTK=56+35,5×2=127đvC

6)FeCl3

PTK= 56 +35,5×3=162,5đvC

7)NaNO3

PTK= 23 + 14 +16×3=85đvC

8)BaO

PTK=137+16=153đvC

9)ZnS

PTK=65+32=97đvC

10)Fe3O4

PTK=56×3+16×4=232đvC

11)Na3PO4

PTK=23×3+31+16×4=163đvC

12)K2S

PTK= 39×2+32=110đvC

13)FeSO4

PTK= 56+32+16×4=152đvC

14)AgCl

PTK= 108+35,5=143,5đvC

15)K2SO4

PTK=39.2+32+16.4=174 đvC

16)C2H5OH

PTK=12×2+5+16+1=46đvC

17)C12H22O11

PTK= 12×11+1×22+16×11=132+22+176=342đvC

18)Zn(OH)2

PTK=65+16×2+2=99đvC

19)Fe2(SO4)3

PTK=56×2+32×3+16×12=112+96+192=400đvC

20)Al(NO3)3

PTK=27+14×3+16×9=27+42+144=213đvC

Giải thích các bước giải:

1.$PTK_{H_2O}$=1.2+16=18 đvC

2,$PTK_{H_3PO_4}$=1.3+31+16.4=98 đvC

3,$PTK_{MgSO_4}$=24+32+16.4=120 đvC

4,$PTK_{CuO}$=64+16=80 đvC

5,$PTK_{FeCl_2}$=56+35,5.2=127 đvC

6,$PTK_{FeCl_3}$=56+35,5.3=162,5 đvC

7,$PTK_{NaNO_3}$=23+14+16.3=85 đvC

8,$PTK_{BaO}$=137+16=153 đvC

9,$PTK_{ZnS}$=65+32=97 đvC

10,$PTK_{Fe_3O_4}$=56.3+16.4=232 đvC

11,$PTK_{Na_3PO_4}$=23.3+31+16.4=164 đvC

12,$PTK_{K_2S}$=39.2+32=110 đvC

13,$PTK_{FeSO_4}$=56+32+16.4=152 đvC

14,$PTK_{AgCl}$=108+35,5=143,5 đvC

15,$PTK_{K_2SO_4}$=39.2+32+16.4=174 đvC

16,$PTK_{C_2H_5OH}$=12.2+1.5+16+1=46 đvC

17,$PTK_{C_{12}H_{22}O{11}}$=12.12+1.22+16.11=342 đvC

18.$PTK_{Zn(OH)_2}$=65+(16+1).2=99 đvC

19,$PTK_{Fe_2(SO_4)_3}$=56.2+(32+16.4).3=400 đvC

20,$PTK_{Al(NO_3)_3}$=27+(14+16.3).3=213 đvC

$@Doraemon50th$ 

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