How many formula units make up 21.2 g g of magnesium chloride (MgCl2 M g C l 2 )?

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Acontainer holds 35.8 moles of gas under 10.0 atm of pressure at 70.0 c. what is the volume of the container?