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How many equivalents of oxygen atoms can...

How many equivalents of oxygen atoms can be available from 1 mole of `K_(2)Cr_(2)O_(7)` ?

A

6

B

3

C

5

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
Equivalent mass of `K_(2)Cr_(r)O_(7)` is formula mass/6. Thus, one equivsalent of `K_(2)Cr_(2)O_(7)` contains six equivalents of `K_(2)Cr_(2)O_(7)`, which (according to low of equivalents) will release six equivalents of oxyge. Equivalent mass of oxygen is 8u. Thus, one equivalents of oxygen 8g is equal to half mole of oxygen atoms (atomic mass of oxygen is 16u). This implies that six equivalents of oxygen correspond to `6xx1//2`, i.e., 3 moles of oxygen atoms.
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