СuSO4=63+32+16*4=159
Fe203=56*2+16*3=160
Na2CO4=23*2+12+16*4=122
Ca3(PO4)2=40*3+31*2+16*8=310
Ответ Б,т.к. у азота наименьшая степень окисления -3
C->CaC2->C2H2->C2H4->C2H5OH->C2H4->C2H2
1)Ca+2C=CaC2
2)СaC2+2H2O=Ca(OH)2+C2H2
3)C2H2+H2=C2H4
4)C2H4+H2O=C2H5OH
5)C2H5OH=C2H4+H2O
6)C2H4=C2H2+H2
1. C2H6-->C2H4+H2
C2H4+H2O-->C2H5OH
2. CH2CL-CH2-CH3-->CH2=CH-CH3
CH2=CH-CH3+H2O-->CH3-CH(OH)-CH3
3. C2H4+O--KMnO4-->CH2OH-CH2OH
4. C2H5CL-->C2H4+HCL
C2H4+O--KMnO4-->CH2OH-CH2OH
5. C6H6+Cl2-->C6H5CL+HCL
C6H5CL+NaOH-->C6H5OH+NaCL
6. C3H8-->C3H6+H2
CH2=CH-CH3+H2O-->CH3-CH(OH)-CH3