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?

70 vials. 100.0 multiplied by 14days equals 1400.0 so 20.0 multiplied by 70.0 would equal 1400.0

it would be d. henry moseley

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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