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5 questions
H2 + S → H2SH_2\ \ +\ \ S\ \ \ \rightarrow\ \ \ H_2SH2 + S → H2S
1,1,1
1,2,1
2,2,2
1,2,2
K2CrO4+ Pb(NO3)2 → PbCrO4 + KNO3K_2CrO_4+\ Pb\left(NO_3\right)_2\ \ \rightarrow\ \ PbCrO_4\ +\ KNO_3K2CrO4+ Pb(NO3)2 → PbCrO4 + KNO3
2,1,1,2
1,1,1,2
1,2,1,2
2,1,2,1
FeCl3+Ca(OH)2→ Fe(OH)3+CaCl2FeCl_3+Ca\left(OH\right)_2\rightarrow\ Fe\left(OH\right)_3+CaCl_2FeCl3+Ca(OH)2→ Fe(OH)3+CaCl2
2,2,1,2
1,2,2,3
3,2,2,2
2,3,2,3
AgNO3+H2S → Ag2S + HNO3AgNO_3+H_2S\ \rightarrow\ Ag_2S\ +\ HNO_3AgNO3+H2S → Ag2S + HNO3
1,2,2,1
2,2,1,1
CO + Fe2O3 → Fe + CO2CO\ +\ Fe_2O_3\ \rightarrow\ Fe\ +\ CO_2CO + Fe2O3 → Fe + CO2
1,2,1,3
3,1,2,3
3,3,2,1
3,1,1,3
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