A Queens landlord was killed by her teen tenant during a fight that erupted this week when he failed to make good on rent, authorities said Thursday. Davi Vidal, 19, lashed out at Leo Zoraida, 55, around 5:15 p.m. Tuesday inside their building on 96th Street near Northern Boulevard in East Elmhurst, cops said. Vidal hadn’t been paying rent, sparking the deadly altercation with Zoraida. Cops say the landlord was found unconscious and unresponsive with scratches on her face inside an apartment.