C.Pennsylvania Titusville is in the state of Pennsylvania
D milk turning sour
the other options are physical changes
Answer:
False
Explanation:
Phosphorus is number 15 on the periodic table, so its electronic configuration is:

you add the masses of the reactants, because of conservation of mass. if there are two or more products they will ask you to find the mass of only one product or the sum of the mass of all products