A while back I noticed that the nitroethane synth using oleum and ethanol(https://www.thevespiary.org/rhodium/Rhodium/chemistry/nitroalkane.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/nitroalkane.html)
) mentions using one mole of 20%oleum to 2 moles ethanol.
Can someone just remind me how I'd work out the weight of one mole of oleum(the fact thats its a mixture is causing the confusion/I think I know but want to be sure).
ps never heard of 100% H2SO4 as a commodity either.