October 2019 1 45 Report
Faça o balanceamento das equações abaixo:

a)Cr+O2 = Cr2O3
b)HCl+O2 = H2O+Cl2
c)Al2 (CO3)3 = Al2O3+CO2
d)Ca (OH)2+HNO3 = Ca(NO3)2+H2O
e)MnO2+HCl = MnCl2+H2O+Cl2
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