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\(P_2O_5+3H_2O\rightarrow2H_3PO_4\) (1:3:2)
\(2C_2H_2+5O_2\xrightarrow[]{t^o}4CO_2+2H_2O\) (2:5:4:2)
\(2Fe\left(OH\right)_3\xrightarrow[]{t^o}Fe_2O_3+3H_2O\) (2:1:3)
\(4Na+O_2\rightarrow2Na_2O\) (4:1:2)
\(2Mg+O_2\xrightarrow[]{t^o}2MgO\) (2:1:2)
\(2Fe+3Cl_2\xrightarrow[]{t^o}2FeCl_3\) (2:3:2)
\(Mg+2HCl\rightarrow MgCl_2+H_2\) (1:2:1:1)
\(2C_4H_{10}+13O_2\xrightarrow[]{t^o}8CO_2+10H_2O\) (2:13:8:10)
\(3NaOH+AlCl_3\rightarrow3NaCl+Al\left(OH\right)_3\) (3:1:3:1)
\(3Cu+8HNO_3\rightarrow3Cu\left(NO_3\right)_2+2NO+4H_2O\) (3:8:3:2:4)
\(2Al\left(OH\right)_3\rightarrow Al_2O_3+3H_2O\left(2:1:3\right)\)
\(2C_2H_2+5O_2\rightarrow4CO_2+2H_2O\left(2:5:4:2\right)\)
\(Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\left(1:2:1:1\right)\)
\(CH_4+2O_2\rightarrow CO_2+2H_2O\left(1:2:1:2\right)\)
\(a,Na+H_2O\to NaOH+\dfrac{1}{2}H_2\\ b,Fe_2O_3+3H_2\xrightarrow{t^o}2Fe+3H_2O\\ c,2C_6H_6+15O_2\to 12CO_2+6H_2O\\ d,4P+5O_2\xrightarrow{t^o}2P_2O_5\\ e,4Al+3O_2\xrightarrow{t^o}2Al_2O_3\\ g,2R+2nH_2O\to 2R(OH)_n+nH_2\\ h,2Fe+3H_2SO_4\to Fe_2(SO_4)_3+3H_2\)
C1:
\(2KMnO_4\rightarrow K_2MnO_4+ MnO_2+O_2\)(tỉ lệ 2:1:1:1)
2Al(OH)\(_3\) + 3H\(_2\)SO\(_4\) → Al\(_2\)(SO4)\(_3\) + 6H2O(tỉ lệ 2:3:1:6)
\(4Na+O_2\rightarrow2Na_2O\)(tỉ lệ:4:1:2)
\(2Al+3Cl_2\rightarrow2AlCl_3\)(tỉ lệ:2:3:2)
\(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)(tỉ lệ:2:1:3)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)(tỉ lệ 1:6:2:3)
\(4P+5O_2\rightarrow2P_2O_5\)(tỉ lệ:4:5:2)
\(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)(tỉ lệ 1:3:1:3)
\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)(tỉ lệ :1:2:1)
C2/
a,
\(mFeO=0,07.72=5,04g\)
\(mNa_2SO_4=0,25.142=35,5g\)
\(mK_2SO_4=0,03.174=5,22g\)
\(mH_2SO_4=0,25.98=24,5g\)
C3/
a,
\(VO_{2_{đkt}}=1,25.24=30lit\)
\(VO_{2_{đktc}}=1,25.22,4=28lit\)
b,
\(VN_{2_{\left(đkt\right)}}=0,125.24=3lit\)
\(VN_{2_{\left(đktc\right)}}=0,125.22,4=2,8lit\)
a: \(4Na+O_2\rightarrow2Na_2O\)
=>\(Na:O_2:Na_2O=4:1:2\)
b: \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)
Tỉ lệ là 1:3:2
c: \(2Fe\left(OH\right)_3\rightarrow Fe_2O_3+3H_2O\)
Tỉ lệ là 2:1:3
d: \(Na_2CO_3+CaCl_2\rightarrow CaCO_3\downarrow+2NaCl\)
Tỉ lệ là 1:1:1:2
Xem lại PT b
P2O5 + 3 H2O -> 2H3PO4 (Tỉ lệ: 1:3:2)
mn oi dau = la dau suy ra nha moi nguoi giup mk voi
a) 4Fe(OH)2 + O2 +2H2O => 4Fe(OH)3
b, CnH2n + 3n/2O2 => nCO2 + nH2O
C, KClO3 =>KCl +3/2O2
D, 2KMnO4 => K2MnO4 + MnO2 + O2
E , Fe3O4 +8HCl => 2FeCl3 +FeCl2 +4H2O