Commutator (electric) A commutator is a moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine.
The word equation that would represent the formation of lithium oxide from lithium metal and oxygen is: lithium + oxygen to lithium oxide. In chemical symbols, the balanced chemical equation is expressed as: Li + O2 = Li2O.
CuO + H2 ? Cu + H2O 2)What mass of hydrogen is produced when 195 mg of potassium is added to water? 2 K + 2 H2O ? 2 KOH + H2 3)What mass of magnesium oxide is formed when 6 g of magnesium reacts with oxygen? 2 Mg + O2 ? 2 MgO 4)The pollutant sulphur dioxide can removed from the air by reaction with calcium carbonate in the presence of oxygen.