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QAIPMT-2007-Ch-2302: NEET 2007 Chemistry - Class 11 AIPMT-2007-Ch-2302 Solution: An element, X has the following isotopic composition:…

An element, X has the following isotopic composition: 200X:90%^{200}X: 90\%, 199X:8.0%^{199}X: 8.0\%, 202X:2.0%^{202}X: 2.0\%. The weighted average atomic mass of the naturally occurring element X is closest to

Multiple Choice Options

  • A 201 amu
  • B 202 amu
  • C 199 amu
  • D 200 amu

Step-by-Step Verified Solution

Average isotope mass of X = 200 _ 90 + 199 _ 8 + 202 _ 2 90 + 8 + 2 = 18000 + 1592 + 404 100 = 199.96 a.m.u � 200 a.m.u

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