Apatient needs to take 625 mg of ibuprofen twice daily. the pills in the bottle are each 250. mg. how many pills does the patient need to take each time she wants the 625 mg dosage? assume that these pills are scored and can be cut in half if necessary.

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

How many moles of gas are present if p=11 atm, v=12l, t=185k?

What happens to isotopes that are unstable?