A patient is prescribed 100.0 mg/day of antibiotic for 2
weeks. The antibiotic is
available in vials that contain 20.0 mg/vial of the drug. How many vials are
necessary for the entire treatment?

Iknow the answer is a but i don't know why

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Can someone me with 6 to 10 plz this is for masteries test.