Which phrase best matches the definition of the term constellation? A. a group of stars that are nearby B. a group of stars that has a name C. a group of stars that are unknown D. a group of stars invisible to the naked eye

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Nonpoint source pollution is difficult to control because it

Ab c or d ? i’m not sure what the answer is