Write the Chemical formula of potassium Carbonate and Calculate its folmula unit mass. (Atomic mass of potassium =39 u, Atomic mass of carbon= 12 u, Atomic mass of oxyblgen =16 u.)

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy