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Author Topic: as chem help!  (Read 1000 times)

Offline angel_ak

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as chem help!
« on: June 01, 2011, 08:37:14 am »
which gas closely approaches ideal behaviour at room temp and pressure?
ammonia
carbon dioxide
helium
oxygen
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elemis

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Re: as chem help!
« Reply #1 on: June 01, 2011, 09:06:32 am »
I'll give you a hint :

To be an ideal gas you must have little or no intermolecular forces and be as small as possible.

Which one fits the bill ?

Think.
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Offline angel_ak

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Re: as chem help!
« Reply #2 on: June 01, 2011, 09:12:29 am »
helium!?
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Offline angel_ak

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Re: as chem help!
« Reply #3 on: June 01, 2011, 09:13:19 am »
can i go on for more qs?
have my ppr kal =/
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Offline angel_ak

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Re: as chem help!
« Reply #4 on: June 01, 2011, 09:22:55 am »
ammonium nitrate NH4NO3, can decompose explosively when heated.

NH4NO3 ----------------> N2O + 2H2O

what are the changes in the oxidation num of the two N atoms in NH4NO3 when this reaction proceeds?

1. -2, -4
2. +2, +6
3. +4, -6
4. +4, -4
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elemis

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Re: as chem help!
« Reply #5 on: June 01, 2011, 09:49:41 am »
We have a dedicated thread for chemistry :


https://studentforums.biz/sciences-149/chemistry-doubts-10366/
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