
Concept explainers
(a)
Interpretation:
Molar mass of selenium as per Dobereiner relationship should be identified.
Concept introduction:
Dobereiner triadic relationship states that the
The neighbour atom of selenium are S and Te having molar masses as 32 u and 127 u.
(b)
Interpretation:
Molar mass of selenium as per periodic table should be identified.
Concept introduction:
Dobereiner triadic relationship states that the atomic mass of middle element is the average of molar mass of smaller neighbour atom and molar mass of heavier neighbour atom in same group.
The neighbour atom of selenium are S and Te having molar masses as 32 u and 127 u.

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Chapter 2 Solutions
Chemistry For Changing Times (14th Edition)
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