a) BaO: 153 đvC

b) Al₂O₃: 102 đvC

c) P₂O₅: 142 đvC

d) HNO₃: 63 đvC

e) Fe₂(SO₄)₃: 400 đvC

f) Na₃PO₄: 164 đvC

g) Mg(OH)₂: 58 đvC

h) K₂CO₃: 138 đvC

a)\(BaO\Rightarrow PTK=137+16=153\left(đvC\right)\)

b)\(Al_2O_3\Rightarrow PTK=2\cdot27+3\cdot16=102\left(đvC\right)\)

c)\(P_2O_5\Rightarrow PTK=2\cdot31+5\cdot16=142\left(đvC\right)\)

d)\(HNO_3\Rightarrow PTK=1+14+3\cdot16=63\left(đvC\right)\)

f)\(Na_3PO_4\Rightarrow PTK=3\cdot23+31+4\cdot16=164\left(đvC\right)\)

e)\(Fe_2\left(SO_4\right)_3\Rightarrow PTK=2\cdot56+3\cdot32+12\cdot16=400\left(đvC\right)\)

g)\(Mg\left(OH\right)_2\Rightarrow PTK=24+2\cdot16+2=58\left(đvC\right)\)

h)\(K_2CO_3\Rightarrow PTK=2\cdot39+12+3\cdot16=138\left(đvC\right)\)

Nhìn dãy chất dài sợ hãi luônnnn

\(\text{Oxit:}\)

\(-Al_2O_3:\)\(\text{Nhôm oxit}\)

\(-BaO:\) \(\text{Bari oxit}\)

\(-ZnO:\) \(\text{Kẽm oxit}\)

\(-MgO:\) \(\text{Magie oxit}\)

\(\text{Axit:}\)

\(-H_3PO_4:\) \(\text{Axit photphoric}\)

\(-H_2S:\) \(\text{Axit sunfua}\)

\(\text{Bazo: }\)

\(-Cu\left(OH\right)_2:\) \(\text{Đồng (II) hidroxit }\)

\(-KOH:\) \(\text{Kali hidroxit }\)

\(-Fe\left(OH\right)_3:\) \(\text{Sắt (III) hidroxit }\)

\(-Al\left(OH\right)_3:\) \(\text{Nhôm hidroxit }\)

\(-Ca\left(OH\right)_2:\) \(\text{Canxi hidroxit }\)

\(\)\(\text{Muối: }\)

\(-ZnCl_2:\) \(\text{Kẽm clorua}\)

\(-FeS:\) \(\text{Sắt (II) sunfua}\)

\(-AlCl_3:\) \(\text{Nhôm clorua}\)

\(-MgSO_4:\) \(\text{Magie sunfat }\)

\(-Na_2HPO_4:\) \(\text{Natri hiđrophotphat}\)

\(-CaCO_3:\) \(\text{Canxi cacbonat}\)

\(-CuSO_4:\) \(\text{Đồng (II) sunfat }\)

\(-BaSO_3:\) \(\text{Bari sunfit}\)

\(-Ca_3\left(PO_4\right)_2:\) \(\text{Canxi photphat }\)

\(-NaHCO_3:\) \(\text{Natri hiđrocacbonat}\)

\(-CaSO_3:\) \(\text{Canxi sunfit }\)

\(-ZnSO_4:\) \(\text{Kẽm sunfat }\)

1) Bari nitrat

2) Canxi clorua

3) Kẽm sunfat 

4) Canxi photphat

5) Đồng (II) hidroxit

6) Natri sunfat 

7) Kali sunfua 

8) Đồng (II) oxit 

9) Thủy ngân (II) oxit 

10) SO₃: Lưu huỳnh trioxit

11) Kẽm clorua

12) Kali sunfit 

13) Magie hidrocacbonat

14) Sắt (II) sunfat 

15) Sắt (III) sunfat 

16) Sắt (III) oxit 

17) Nhôm hidroxit

18) Natri hidroxit

19) Canxi clorua

20) Đồng (II) nitrat

câu 7 đề bị gì í em ko sửa được ạ

Câu 7:Hợp chất Ba(NO3)y: có PTK là 261. Bari có NTK là 137, hóa trị II. Hãy xác định hoá trị của nhóm NO3

1. \(2Al+3Fe\left(NO_3\right)_2\rightarrow2Al\left(NO_3\right)_3+3Fe\)

2. \(P_2O_5+3Ba\left(OH\right)_2\rightarrow Ba_3\left(PO_4\right)_2+3H_2O\)

3. \(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)

4. \(Al_2\left(SO_4\right)_3+3Ca\left(OH\right)_2\rightarrow3CaSO_4+2Al\left(OH\right)_3\)

5. \(Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\)

6. \(Mg\left(NO_3\right)_2\underrightarrow{t^o}MgO+2NO_2+\dfrac{1}{2}O_2\)

7. \(2xFe+yO_2\underrightarrow{t^o}2Fe_xO_y\)

8. \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

9. \(C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)

Bạn tham khảo nhé!

\(1.Al+Fe\left(NO_3\right)_2--->Al\left(NO_3\right)_2+Fe\)

\(2.P_2O_5+3Ba\left(OH\right)_2--->Ba_3\left(PO_4\right)_2+3H_2O\)

\(3.Al\left(OH\right)_3+3HCl--->AlCl_3+3H_2O\)

\(4.Al_2\left(SO_4\right)_3+3Ca\left(OH\right)_2--->3CaSO_4+2Al\left(OH\right)_3\downarrow\)

\(5.Fe_3O_4+8HCl--->FeCl_2+2FeCl_3+4H_2O\)

\(6.2Mg\left(NO_3\right)_2\overset{t^o}{--->}2MgO+4NO_2+O_2\)

\(7.xFe+\dfrac{y}{2}O_2\overset{t^o}{--->}Fe_xO_y\)

\(8.CH_4+2O_2\overset{t^o}{--->}CO_2+2H_2O\)

\(9.C_2H_6O+3O_2\overset{t^o}{--->}2CO_2+3H_2O\)

a) Fe hóa trị II

 Al hóa trị III

b) NO₃ hóa trị I

 PO₄ hóa trị III