I need help under standing my chemistry. I know how to do one step and two step problems but i get lost on the third step. If anyone can help it will be much appreciated.
Thank you.
2007-03-05 11:35:02 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
i'd be glad to help. in fact i just turned on the feature that allows people to email me. anyway...
write the formula for aluminum hydroxide. Al is 3+ OH is 1-. so its Al2O3.
how many Al ions are there? 2, so u find how many moles of Al2O3 there is and multiply by 2.
Al2O3 weighs 102. so its 45/102 or 0.441 moles x 2 =0.882
2007-03-05 11:42:14 · answer #1 · answered by Ari 6 · 0⤊ 0⤋
The answer is 3 moles
2007-03-05 11:41:10 · answer #2 · answered by rockets415 2 · 0⤊ 0⤋
Al2 O3
MW 101.96
45g /101.96 gm/mole x 2
0.882 moles of Al
2007-03-05 11:43:45 · answer #3 · answered by Anonymous · 0⤊ 0⤋