Chemistry NTSE Question Oxygen has two isotopes O16 & O18. If the percentage of O16 is 90 then the atomic weight of oxygen will be (a) 16 (b) 16.2 (c) 16.4 (d) None of these
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Average atomic mass=(∑ %abundance*isotopic mass)/100
(16*90)+(18*10)/100
(1440+180)/100
1620/100
16.2
(b)16.2
(16*90)+(18*10)/100
(1440+180)/100
1620/100
16.2
(b)16.2
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(c)16.4----------------------------------
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