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Topic: Average Atomic mass  (Read 2626 times)

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Offline Kartiky14

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Average Atomic mass
« on: July 08, 2012, 12:29:00 PM »
Uranium's average atomic mass is 238.03 u.U235 weighs 235.044 u and U238 weighs 238.051 u. What would be the percentage abundance of U235 in nature ?
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Offline Borek

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Re: Average Atomic mass
« Reply #1 on: July 08, 2012, 12:44:31 PM »
You have to show your attempts at solving the question to receive help. This is a forum policy.
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Offline bossza500

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Re: Average Atomic mass
« Reply #2 on: August 03, 2012, 11:46:46 PM »
In nature Uranium's average atomic mass has 2 isotopes.<follow the question>.
   The total of percentage in nature is 100%. Let's percent of u235 in nature = x %,so percent of u238 = 100-x %.
  This is the mathematics method.
                                  238.03= ( x(235.04) + (100-x)(238.051) ) / 100 
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