Which of the following is a way of purifying water?

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

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

Which sample at stp has the same number of atoms as 18 liters of ne at stp