By examining electron domain geometry, one can determine that the ammonia molecule (NH3) has
a. one sp2 orbital.
b. two sp2 orbitals.
c. three sp3 orbitals.
d. four sp3 orbitals.

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.