The process by which water vapor changes to liquid water is called
a. condensation.
b. evaporation.
c. freezing.
d. melting.

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

How many moles are in 43.9 l of oxygen

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