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Atomic mass of an unknown element
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Topic: Atomic mass of an unknown element (Read 8163 times)
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dipndots
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Atomic mass of an unknown element
«
on:
September 20, 2007, 11:32:39 PM »
So heres the question:
It is found that 0.119g of element Z contains 1.50 x 10^21 atoms. The atomic mass of Z is..
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Yggdrasil
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Physical Biochemist
Re: Atomic mass of an unknown element
«
Reply #1 on:
September 21, 2007, 12:40:38 AM »
Please read the
Forum Rules
. You should that you've at least attempted to answer the problem before we will help you.
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Padfoot
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Re: Atomic mass of an unknown element
«
Reply #2 on:
September 21, 2007, 04:26:21 AM »
What is
atom
ic
mass
?
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dieded
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Re: Atomic mass of an unknown element
«
Reply #3 on:
September 22, 2007, 06:30:21 AM »
Remember the
Avogadro constant
.
Approximately 6 * 10^23 atoms of Z will make up the atomic mass of Z.
And Yggdrasil you should at least at least help out dipndots a bit.
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Borek
Mr. pH
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I am known to be occasionally wrong.
Re: Atomic mass of an unknown element
«
Reply #4 on:
September 22, 2007, 07:24:30 AM »
Mass of 5 marbles is found to be 3 g, what is a mass of a dozen?
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ChemBuddy
chemical calculators - stoichiometry, pH, concentration, buffer preparation,
titrations.info
kiet
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Re: Atomic mass of an unknown element
«
Reply #5 on:
September 22, 2007, 09:33:12 AM »
1 mol atoms has 6.023 x 10^23 atoms
We know that n =(the amount of atoms)/(6.023x10^23)
=> n = (1.50x10^21)/(6.023X10^23) =0.00249 (mol)
and m=nxM => M=m/n=0.119/0.00249=47.79
So the atomic mass of the element Z is approximately 47.8
Z is Titanium.
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dipndots
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Re: Atomic mass of an unknown element
«
Reply #6 on:
September 27, 2007, 09:44:04 PM »
I got it. omg thanks. Seems simple when u explained it
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Atomic mass of an unknown element