Ms. Moulden’s science class is learning to identify metals by their density. She gave the students a table, shown below, to help identify their samples. One student’s sample has a volume of 12. 82 cm3 and a mass of 114.61 g. Calculate the density of the sample. Using the table, what is the identity of the student’s sample?

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