If a molecule has four hybrid sp3 orbitals, it can be concluded that the molecule has a
a: trigonal planar molecular geometry.
b: trigonal planar electron domain geometry.
c: tetrahedral molecular geometry.
d: tetrahedral electron domain geometry.

C: tetrahedral molecular geometry

Explanation: The number of hybrid orbitals are 4 that means the hybridization will be and the electronic geometry of the molecule will be tetrahedral.

But if one or more positions are occupied by lone pair of electrons, the repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be trigonal pyramidal or bent.

For Example : has nitrogen in hybridization but as only three hydrogen are present, fourth position will be occupied by lone pair and molecular geometry will be trigonal pyramidal.

has oxygen in hybridization but as only two hydrogen are present, third and fourth position will be occupied by lone pair and molecular geometry will be bent.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

just did the assignment and the answer was #1 +2 n