Answer
It is necessary to have 0.0539L of HCl to neutralize this quantity of $NH_3$
Work Step by Step
1. Find the volume necessary for the neutralization:
$1 * {C_1 * V_1} = 1 * {C_2 * V_2}$
$ 0.265* 1.25= 6.15 * V_2$
$ 0.33125 = 6.15 * V_2$
$V_2 = 0.05386L$ of HCl.