I need help setting up these problems: (dimmesional analysis)
for 7 x10^33 atoms of Al, how many grams are present
What is the mass ( in amu or in grams) of 3999 formula units of beryllium bromide
What is the mass of 5 molecules of carbon dioxide
2007-01-04 11:22:01 · 3 answers · asked by Mia16 3 in Science & Mathematics ➔ Chemistry
[(7x10^33 atoms Al)(1mol Al) (26.98g Al)] / [(6.022x10^23 atoms Al)(/1 mol Al) ]
solve it for 1st one!!
[(5 molecules of carbon dioxide)(1 mole of CO2)(28g of CO2)] / [(6.023X10^(23) molecules of CO2)(1 mole of CO2)]
solve it for third part!!
3999formula units/168.81g BeBr2=23.69 amu
answer for second part!!
I hope this helps!!
2007-01-04 12:05:08 · answer #1 · answered by smart-crazy 4 · 0⤊ 0⤋
the 1st one:
(7x10^33 atoms Al)(1mol Al / 6.022x10^23 atoms Al)(26.98g Al/1 mol Al)
2007-01-04 19:46:58 · answer #2 · answered by Edge 2 · 0⤊ 0⤋
I'm trying to remeber this but for 7x10^33 I think you have to divide it by 26.9, from AL. Which I think it gets 2.60x10^32. I am not very sure about it. But you may have to check.
2007-01-04 19:44:14 · answer #3 · answered by Midget 2 · 0⤊ 0⤋