Question

$1$ g equivalent of a substance is the weight of that amount of the substance which is equivalent to:

• A. $0.25$ mol $O_2$
• B. $8$ g $O_2$
• C. $16$ g $O_2$
• D. $0.50$ mol $O_2$

Answer 1

Answer: (A), (B)

The correct options are
A $0.25$ mol $O_2$
B $8$ g $O_2$

The reaction for the electron transfer is $0.5O_2+2e^{-}\to O^{2-}$.
Thus, $1$ mole of oxygen requires $4$ moles of electrons.
Hence, $1$ mole of electrons corresponds to $0.25$ moles of oxygen or $8$ grams.