Answer:
When substances undergo chemical change, the mass of the reactants will be the same as the mass of the products. Mass is converted when substances undergo chemical change but is not lost. Mass cannot be created or destroyed.
Explanation:
i hope this helps :)
Krypton-84 is the most abundant type of Krypton. The answer is C.
If you need this to be explained, I will do my best it's a bit difficult to say how to find it out, but I will if you need me to.
Answer:
C
Explanation:
energy cannot be created or destroyed like solar energy for instance. it is already energy because it comes from the sun and for other reason.
Hope this helps!
