Name two safety measures to follow when attaching the side-arm of the round bottom flask to the condenser, using a one-holed rubber stopper.
a) Secure the rubber stopper tightly and ensure proper ventilation.
b) Use a non-conductive material for the stopper and wear protective gloves.
c) Avoid over-tightening the stopper and maintain proper alignment.
d) Use a two-holed rubber stopper for better stability.
