_Mno2+_HCl _MnCl2+_H2O+_Cl2

Hey there!

MnO₂ + HCl → MnCl₂ + H₂O + Cl₂

Balance Cl.

1 on the left, 4 on the right. Add a coefficient of 4 in front of HCl.

MnO₂ + 4HCl → MnCl₂ + H₂O + Cl₂

Balance H.

4 on the left, 2 on the right. Add a coefficient of 2 in front of H₂O.

MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂

Balance O.

2 on the left, 2 on the right. Already balanced.

Balance Mn.

1 on the left, 1 on the right. Already balanced.

Our final balanced equation:

MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂

Hope this helps!