Equation 1: H2 + Cl2 = 2HCl (already balanced)
Equation 2: Fe + Cl2 = FeCl3 (balanced by adding coefficient 2 before Cl2)
Equation 3: 2SnO + O2 = 2SnO2 (balanced by adding coefficient 2 before SnO)
Equation 4: Mg + CO2 = 2CO + MgO (balanced by adding coefficient 2 before CO)
Equation 5: 2Al + 3H2O = Al2O3 + 3H2 (balanced by adding coefficients 2 before Al and 3 before H2O)
Equation 6: C2H6O + O2 = 3CO2 + 3H2O (balanced by adding coefficients 3 before CO2 and H2O)
Equation 7: C6H6O + O2 = 7CO2 + 3H2O (balanced by adding coefficients 7 before CO2 and 3 before H2O)
Equation 8: Zn + SO2 = 2ZnO + S (balanced by adding coefficient 2 before ZnO)
Equation 9: 4CO + Fe2O3 = Fe3O4 + CO2 (balanced by adding coefficient 4 before CO)
Equation 10: N2 + 3H2 = 2NH3 (common completion for nitrogen fixation)
Equation 1: H2 + Cl2 = HCl
This equation is already balanced. There are two H atoms on the left and two on the right, and two Cl atoms on the left and right.
Equation 2: Fe + Cl2 = FeCl3
This equation is not balanced. There are one Fe atom on the left and three on the right. To balance it, we need to add a coefficient of 2 in front of the Cl2 on the left. This gives us:
2 Fe + Cl2 = FeCl3
Now, there are two Cl atoms on both sides and the equation is balanced.
Equation 3: SnO + O2 = SnO2
This equation is not balanced. There is one Sn atom on both sides, but one O atom on the left and two on the right. To balance it, we need to add a coefficient of 2 in front of the SnO on the left. This gives us:
2 SnO + O2 = SnO2
Now, there are two O atoms on both sides and the equation is balanced.
Equation 4: Mg + CO2 = CO + MgO
This equation is not balanced. There is one Mg atom on both sides, but one C atom on the left and two on the right. To balance it, we need to add a coefficient of 2 in front of the CO on the right. This gives us:
Mg + CO2 = 2 CO + MgO
Now, there are two C atoms on both sides and the equation is balanced.
Equation 5: Al + H2O = Al2O3 + H2
This equation is not balanced. There is one Al atom on the left and two on the right, and two H atoms on the left and one on the right. To balance it, we need to add a coefficient of 2 in front of the Al on the left and a coefficient of 3 in front of the H2O on the right. This gives us:
2 Al + 3 H2O = Al2O3 + 3 H2
Now, there are two Al atoms and six H atoms on both sides and the equation is balanced.
Equation 6: C2H6O + O2 = CO2 + H2O
This equation is not balanced. There are two C atoms, six H atoms, and two O atoms on the left, and one C atom, two O atoms, and two H atoms on the right. To balance it, we need to add a coefficient of 3 in front of the CO2 on the right and a coefficient of 3 in front of the H2O on the right. This gives us:
C2H6O + O2 = 3 CO2 + 3 H2O
Now, there are two C atoms, six H atoms, and four O atoms on both sides and the equation is balanced.
Equation 7: C6H6O + O2 = CO2 + H2O
This equation is not balanced. There are six C atoms, six H atoms, and two O atoms on the left, and one C atom, two O atoms, and two H atoms on the right. To balance it, we need to add a coefficient of 7 in front of the CO2 on the right and a coefficient of 3 in front of the H2O on the right. This gives us:
C6H6O + O2 = 7 CO2 + 3 H2O
Now, there are six C atoms, six H atoms, and four O atoms on both sides and the equation is balanced.
Equation 8: Zn + SO2 = ZnO + S
This equation is not balanced. There is one Zn atom on both sides, but one S atom on the left and two on the right. To balance it, we need to add a coefficient of 2 in front of the ZnO on the right. This gives us:
Zn + SO2 = 2 ZnO + S
Now, there are two Zn atoms and two S atoms on both sides and the equation is balanced.
Equation 9: Fe2O3 + CO = Fe3O4 + CO2
This equation is not balanced. There are two Fe atoms on the left and three on the right, and one C atom and two O atoms on both sides. To balance it, we need to add a coefficient of 4 in front of the CO on the left. This gives us:
4 CO + Fe2O3 = Fe3O4 + CO2
Now, there are three C atoms and six O atoms on both sides and the equation is balanced.
Equation 10: Consider the equation N2 + H2 -> NH3. This equation is not balanced because there are two N atoms on the left and only one N atom on the right. To balance the equation, we can add a coefficient of 2 in front of the NH3 on the right. This gives us the balanced equation:
N2 + 3 H2 -> 2 NH3