BebeRayyy BebeRayyy

05-03-2020
Chemistry

contestada

A new discovered element, Z, has two natural occurring isotopes

Respuesta :

omarelgueroguapo2 omarelgueroguapo2

05-03-2020

Answer:

the ans is (a)268..1

the fomate of finding the average is

(90.3×267.8+9.7×270.9)/100

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