23) We know the law of Conservation of Mass states that mass is neither
created nor destroyed by chemical reactions or physical transformations so why
is the mass of a rusted nail greater than the mass of the original nail (assume
that all of the rust is attached to the nail).

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