____________ ____________ is an area, approximately three feet around a patient, in which the patient feels relatively comfortable

What is the lower flammable limit?

A) The exact proper mixture (mass of each reactant) of chemical for a chemical reaction B) The percentage of air and fuel where the lowest amount of fuel will combust C) The highest percentage of fuel to air where combustion can occur D) A mixture that reacts and does not consume fuel or oxygen

While performing CPR on a cardiac arrest victim, the therapist is ventilating the patient with a bag-valve-mask manual resuscitator, and is delivering pressures between 30 and 35 cm H2O to the patient's airway. What should be this therapist's concern?

A. overdistention of the patient's lungs B. gastric insufflation C. under inflation of the patient's lungs D. No is necessary because these pressures are harmless.