Does anyone know the answers for these 2 questions? It’s for chemistry

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

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above