Perform the following mathematical operation, and
report the answer to the
appropriate number of
significant figures
653.12 + 12.10247 = [?]

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

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 could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?