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Topic: a problem - urgent  (Read 2436 times)

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Offline Blue

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a problem - urgent
« on: June 27, 2013, 03:43:19 AM »
How many primary alcohols, which 3.7g releases 560cm^3 H2 in reaction with Na, are there?
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Offline Archer

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Re: Chemistry
« Reply #1 on: June 27, 2013, 03:46:27 AM »
How many moles of H2(g) in 560cm3?
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Offline Blue

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Re: Chemistry
« Reply #2 on: June 27, 2013, 03:48:09 AM »
Quote from: Archer on June 27, 2013, 03:46:27 AM
How many moles of H2 in 560cm3?

0.025
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Offline sjb

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Re: Chemistry
« Reply #3 on: June 27, 2013, 04:10:14 AM »
Quote from: Blue on June 27, 2013, 03:48:09 AM
Quote from: Archer on June 27, 2013, 03:46:27 AM
How many moles of H2 in 560cm3?

0.025

Maybe, but let's run with that.

For a generic alcohol, ROH, can you write a balanced equation for the reaction with sodium?
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Offline Blue

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Re: Chemistry
« Reply #4 on: June 27, 2013, 04:19:35 AM »
Quote from: sjb on June 27, 2013, 04:10:14 AM
Quote from: Blue on June 27, 2013, 03:48:09 AM
Quote from: Archer on June 27, 2013, 03:46:27 AM
How many moles of H2 in 560cm3?

0.025

Maybe, but let's run with that.

For a generic alcohol, ROH, can you write a balanced equation for the reaction with sodium?

2R-OH + 2Na = 2R-ONa + H2
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Offline Blue

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Re: a problem - urgent
« Reply #5 on: June 27, 2013, 04:36:01 AM »
I found that Mr of alcohol is 74, so that alcohol is C4H9OH, and it's easy now to find the number of primary alcohols
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