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SkyTro
@SkyTro
April 2021
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Помогите решить практ.работу ... Вариант 1
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DJToxa
Verified answer
1)
Na-->Na2O-->NaOH--->Na2SO4
4Na+O2=2Na2O
Na2O+H2O=2NaOH
2NaOH+H2SO4=Na2SO4+2H2O
2)
2Cu+O2=2CuO
CuO+H2O=Cu(OH)2
Cu(OH)2+2HNO3=Cu(NO3)2+2H2O
2Cu(NO3)2(t)=2CuO+4NO2+O2
3)
SiO2+C=Si+CO2
Si+2Cl2=SiCl4
3Si+2N2=Si3N4
2Mg+Si=Mg2Si
Mg2Si+2H2SO4=2MgSO4+SiH4
SiH4+2O2=SiO2+2H2O
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Answers & Comments
Verified answer
1)Na-->Na2O-->NaOH--->Na2SO4
4Na+O2=2Na2O
Na2O+H2O=2NaOH
2NaOH+H2SO4=Na2SO4+2H2O
2)
2Cu+O2=2CuO
CuO+H2O=Cu(OH)2
Cu(OH)2+2HNO3=Cu(NO3)2+2H2O
2Cu(NO3)2(t)=2CuO+4NO2+O2
3)
SiO2+C=Si+CO2
Si+2Cl2=SiCl4
3Si+2N2=Si3N4
2Mg+Si=Mg2Si
Mg2Si+2H2SO4=2MgSO4+SiH4
SiH4+2O2=SiO2+2H2O