42. Solving a chemistry problem

42. Solving a chemistry problem

30. One of the methods for obtaining oxygen is the decomposition of potassium permanganate. The reaction proceeds according to the scheme: 2KMnO4→ K2MnO4 MnO2 O2↑
Using rational solution, calculate the volume of oxygen and the mass of the solid residue obtained from the decomposition of 50 g of potassium permanganate.

Additional information:

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.