How many moles of sulfur dioxide are held inside a 67.4 L canister at a pressure of 0.25 atm and a temperature of 40.0 °C?

the answer is b & c i believe : )

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

im pretty sure its b