The SbCl5 molecule has a trigonal bipyramid structure. Therefore, the hybridization of Sb orbitals should be (A)sp2 (B) sp3 (C)dsp3 (D)dsp3 (E)d2sp3

p. s. the answer is D, but someone please explain this to me, thx!

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.