Given the formula for hydrazine:

how many pairs of electrons are shared between the two nitrogen atoms?
(1) 1 (3) 3

(2) 2 (4) 4

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Individuals within populations exhibit some diversity. as a result of possessing slightly different traits, some individuals are better able to survive and reproduce than others. if these individuals changes in the characteristics of the population may occur over time. the cumulative change in these characteristics is known as

Four statements about the development of the atomic model are shown below. a: electrons have wavelike properties. b: atoms have small, negatively charged particles. c. the center of an atom is a small, dense nucleus. d: atoms are hard, indivisible spheres. which order of statements represents the historical development of the atomic model? c-d-a-b c-d-b-a d— в-а — с d-b-c-a