You have been given 42 g of a mystery solid. When placed in 100 g of water and heated to approximately 29 °C, it appears to create a saturated solution. State your conclusions about the identity of the substance.

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