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Old 12-20-2007, 09:16 PM
chantelle chantelle is offline
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Question Mass question.

Anybody who can help?

How much iodine can me made from 10 grams of sodium iodide

2NaI-->I2


I need to know how you got there though. Not just an answer. We did this so long ago I've forgotten how.
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Old 12-20-2007, 10:00 PM
totbgirl totbgirl is offline
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No problem.

The RAM of Na is 23 and I is 127 Add these together to get 150g for NaI. So 2NaI is 300g

You have 10g so you have 10/300 or 1/30th of a mole of NaI.

The RAM of I is 254. If you have 1/30th of a mole you must have 254*1/30 or 8.47g
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Old 12-20-2007, 10:22 PM
MikeB68 MikeB68 is offline
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That's not a bad explanation for a maths teacher.
If you need any more help chantelle, just post a question in this thread and I will reply ASAP
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Old 12-21-2007, 08:11 PM
totbgirl totbgirl is offline
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What do you mean not bad for a maths teacher???? Huh the cheek of it!
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Old 12-21-2007, 09:17 PM
sallyhawkins sallyhawkins is offline
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Hee hee I saw this and thought it was going to be an RE question. oh well I don't venture to the science block much.!
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Old 01-03-2008, 08:13 PM
chantelle chantelle is offline
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Oops I forgot to say thank you.


Thanks everyone that was really helpful
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Old 01-27-2008, 12:30 AM
spl2011 spl2011 is offline
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The method is correct but then one cannot take approx values in Stoichiometry.
The actual answer is 8.3754.
But the tutor has explained this in a very simple manner which is very much a requirement.
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