| high schoo chem...need help |
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-pho3niks-
Probably a bot.
Joined: 06 May 2006
Posts: 1
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 Posted: Sat May 06, 2006 7:52 am Post subject: high schoo chem...need help |
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hi...
just need the answer to this question if possible....
"What mass of Zinc is formed when 0.2 mole Zinc Oxide reacts with excess carbon?"
i need an answer a.s.a.p!!!
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Lawsen Lew
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Joined: 11 Nov 2006
Posts: 15
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| Posted: Sun Nov 12, 2006 5:48 am Post subject: 13 g Zn(s) |
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O.2 mol of ZnO formed. The carbon is not important to take into consideration, because it is in excess. You might have left a lot of information out of this problem. Zinc, Zn is the starting material at this factory. We need to write a reaction equation and it must be balanced, too.
(s) is solid.
(g) is gas. You usually cannot see gas.
2 Zn(s) + O2(g) -----> 2 ZnO (s)
0.2 mol ZnO (2 mol Zn(s) / 2 mol ZnO (s)) = 0.2 mol Zn(s)
0.2 mol Zn (s) * (65.38 g Zn / 1 mol Zn) = 13.076 g Zn (s)
=13 g Zn
I do not have enough information to check the correctness in this problem . I hope this helps.
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