How many molecules are in 2.7x10-4 mol of CaO?* A.)4.5x10-28 molecules
B.)4.5x10-20 molecules
D.)1.6x1020 molecules
C.)1.6x1024 molecules

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

it is stable as it is in group 0 which have full outer shells of electrons