Make a prediction that describes the relationship between the composition of an unknown substance and its emission spectrum. for example, “if each element can be identified by its then the of an unknown star can be determined."

Why is nh3 classified as a polar molecule

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

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?