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# Particles in a molecule

Chemistry discussion, revision, exam and homework help.

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1. Particles in a molecule
How many particles are there in 0.1 mole potassium iodide, KI, and hydrogen peroxide H2O2, and how did you work that out?

2. Re: Particles in a molecule
Bump
3. Re: Particles in a molecule
there are 6.0221415 × 10^23 particles in 1 mole of anything. so for 0.1 moles you just time avagadro's constant by 0.1
4. Re: Particles in a molecule
...you bumped because no one replied within a minute?
5. Re: Particles in a molecule
(Original post by FXX)
...you bumped because no one replied within a minute?
Lol, no :P usually on threads i see people going Bump bump bump, so my way of casually taking the mick
6. Re: Particles in a molecule
(Original post by cllio)
there are 6.0221415 × 10^23 particles in 1 mole of anything. so for 0.1 moles you just time avagadro's constant by 0.1
Oh right ok, so I don't have to multiply 6.02 x 10^23 for every atom in the molecule? So say for H2O2, I wouldn't have to do the following calculation:

6.02 x 10^23 x 4 (2 H, 2 O) = Ans

Ans * 0.1= ?
7. Re: Particles in a molecule
(Original post by TheStudent.)
Lol, no :P usually on threads i see people going Bump bump bump, so my way of casually taking the mick
You have an odd sense of humour.
8. Re: Particles in a molecule
the formula for the molecule isn't important. The definition of a mole is 6.0221415 × 10^23 molecules. So 0.1 mole of anything will contain 6.0221415 × 10^22 molecules.
9. Re: Particles in a molecule
(Original post by You Failed)
You have an odd sense of humour.
give you a rep but im all out for the day lol
10. Re: Particles in a molecule
(Original post by cllio)
the formula for the molecule isn't important. The definition of a mole is 6.0221415 × 10^23 molecules. So 0.1 mole of anything will contain 6.0221415 × 10^22 molecules.
tyvm!

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Last updated: February 5, 2012
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