Prepare2diluted solutions of Ca(OH)2 with(0.030Nin250ml) and (0.22N in 1000ml) prepared by using 3g in 500ml m. wt.=74 g\mol

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?

Iknow #2 is d. i just need to know why

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?