Party Poker No-Limit Hold'em, $ BB (10 handed) converter

Button ($23)
SB ($23.35)
BB ($26.8)
UTG ($5.5)
Hero ($24.75)
UTG+2 ($24.65)
MP1 ($17.4)
MP2 ($22.2)
MP3 ($47.35)
CO ($177.17)

Preflop: Hero is UTG+1 with Q, Q. SB posts a blind of $0.1.
1 fold, Hero raises to $2, 1 fold, MP1 calls $2, MP2 calls $2, 1 fold, CO calls $2, Button calls $2, 2 folds.

Flop: ($10.35) 5, 7, J (5 players)
Hero....

This one confused me somewhat, table is loose/passive, 2 of the callers here are tight/passive though. How much do you bet on the flop, and why?