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help needed regarding chemistry.

F

fatimarehman

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I need an urgent reply to this question.
An element Z has two isotopes Z55 and Z57 which are present in the abundance ratio of 2:1.It exist in nature as Z3. It has m/e value 165 167 169 and 171. These are present in the ratio 8:x:y:1. What are the values of x and y? Please i need an urgent reply. Thanks.
 
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