2Н2+О2=2Н2О
2Н2О+2Na=2NaOH+H2
Ca+H2=CaH2
CaH2+I=HI+CaH
2HI+ZnCL2=2HCl+ZnI2
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2Н2+О2=2Н2О
2Н2О+2Na=2NaOH+H2
Ca+H2=CaH2
CaH2+I=HI+CaH
2HI+ZnCL2=2HCl+ZnI2