how many grams of water in 5 moles of water?
how many moles of CO2 would be needed to have a mass of 100 grams?

how many grams of water in 5 moles of water?
how many moles of CO2 would be needed to have a mass of 100 grams?
The molecular weight of water is 2*1+16=18, so one mole of water is 18 grams. 5 moles are 5*18=90 grams.Originally Posted by MoltenWhale
A mole of is 48 grams, so 100 grams is just a little over 2 moles.Originally Posted by MoltenWhale
HTH,
L.
A mole of carbon dioxide is 44 grams, not 48. And this seems like a homework question, and we shouldn't be doing it for him. The answers should be very easy to obtain with a little research if it's homework for a chemistry class or something...Originally Posted by Leszek Luchowski
You're right, my mistake.Originally Posted by Chemboy
Right again. I thought I was answering to an inquisitive mind who wanted the principle illustrated by example (can be easier than an abstract definition), and I still have some hope this is the case  but a lot of kids I know would just copy the answer into their book and never try to understand it. Which of course is counterproductive.Originally Posted by Chemboy
Thanks for your comment. Next time I'll try to help in a wiser way.
Cheers, L.
« ideal gas law  Why is "Heat" considered total kinetic energy in c » 