Ineed to know the answer to this question, it’s stoichiometry

The answer is 680L because once you balance the equation, there is 2 moles of hydrogen so you multiple the amount of hydrogen by 2.

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