Помогите расставить коэффициенты :
1) NO2+H2O+O2 = HNO3
2) HCL + Na2S = H2S+ NaCl
3) Cr+Cl2 = CrCl3
4) Na2O +H2O = NaOH
1) NO2+H2O+O2 = HNO3
2) HCL + Na2S = H2S+ NaCl
3) Cr+Cl2 = CrCl3
4) Na2O +H2O = NaOH
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Answers & Comments
4NO2+2H2O+O2=4HNO3
2HCL + Na2S = H2S+ 2NaCl
2Cr+3Cl2 = 2CrCl3
Na2O +H2O = 2NaOH