`MnO_(2)` on ignition converts into `Mn_(3)O_(4)`. A sample of pyrolusite having 75%
Channel: Doubtnut
Date: 2020-04-19

`MnO_(2)` on ignition converts into `Mn_(3)O_(4)`. A sample of pyrolusite having 75% `MnO_(2)`, 20% inert impurities and rest water is ignited in air to constant mass. What  is the percentage of Mn in the ignited sample ?