Consider the following sequence of reactions.
Assuming that the reaction proceeds to completion, then \( 137 \, \text{mg} \) of \( 4 \)-nitrotoluene will produce ______ \( \, \text{mg} \) of B.
[Given molar mass in \( \, \text{g mol}^{-1} \): H \( = 1 \), C \( = 12 \), N \( = 14 \), O \( = 16 \) and Br \( = 80 \)]
