The answer is D. His belief is was that atoms could not be split. That is what was disproved really fast ;)
Light bulb -it produces heat and light
toaster - it produces heat and the metal strips glow producing light
So multiply number of moles x number of atoms/mole = 1.8066 x 10^24 atoms of H2. One mole of any gas at STP has a volume of 22.4 L. So first determine the number of moles of gas you have.
for example do 7

that 's what I think