Fireworks exploding in the sky and giving off light are an example of a(n)

a. exothermic change
b. change in mass
c. physical change
d. endothermic change

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

Compare and contrast physical changes with chemical changes.

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation