Aballoon contains 0.15 moles of co2 gas. how many molecules of co2 are in the balloon?

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

you need to have a picture of the atom that way we can answer it