What is the angle between two of the phosphorus-chlorine bonds in the phosphorus tetrachloryl?

Anurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. if the stock bottle is labeled 25 mg/ml and the order is a dose of 11.0 mg , how many milliliters will the nurse draw up in the syringe?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Element before carbon on the periodic table