Atablet of benadryl (r), an antihistamine, has a mass of 0.50g. it contains 25 mg of the active ingredient, diphenhydramine hcl. what percent of the tablet is active ingredient? how do i solve this

In which situation can a mixture always be called a solution

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust