Write the following chemical reaction using words: NaCl (aq) + Mg(NO3)2 (aq) → MgCl (cr) + NaNO3 (aq)
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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?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure