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Some Basic Conc...

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  • Question 1
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    The reference standard used for defining atomic mass is

  • Question 2
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    Atomic masses of elements are usually fractional because

  • Question 3
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    Oxygen occurs in nature as a mixture of isotopes 16O, 17O, and 18O having atomic masses of 15.995 u, 16.999 u and 17.999 u and relative abundance of 99.763%, 0.037% and 0.200% respectively. What is the average atomic mass of oxygen?

  • Question 4
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    For every one 37Cl isotope there are three 35Cl isotopes in a sample of chlorine. What will be the ayerage atomic mass of chlorine?

  • Question 5
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    Carbon occurs in nature as a mixture of 12C and 13C. The average atomic mass of carbon is 12.011. What is the % abundance of 12C in nature?

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