2007-10-30 14:23:10 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
number of moles= mass/molar mass
n= 275/55.8+(3x32.1)+(12x16)=0.799 mol
good luck
2007-10-30 14:30:44 · answer #1 · answered by kamran.G 2 · 0⤊ 0⤋
calculate the molecular mass of Fe(SO4)3 by adding up the parts.
275 g divided by that number is the number of moles
2007-10-30 14:27:12 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋
first calculate the molar mass of Fe(SO4)3
--> Fe-55.85 g/mol
-->S-32.07(3) hence the subscript 3
-->O-(16*4)(3) hence the subscript 3
--> 344.06 g/mol total of Fe(SO4)3
then convert from grams to moles:: 275g* (1 mol/344.06g) and you should get .799 mol of Fe(SO4)3
2007-10-30 14:51:53 · answer #3 · answered by PRiiNCESS 2 · 0⤊ 0⤋
Heres my shot at it, hope its right! Fe(55.85g/mol) + S(32.06g/mol)(3) + O(16.00g/mol)(4)(3) = 344.03 then divide 275g by 344.03 which should yield .7993488 ~ .799
Best of Luck!!!
2007-10-30 15:23:36 · answer #4 · answered by Kevin H 2 · 0⤊ 0⤋