Chemistry, 03.08.2019 08:00 huntertaleiya
Chlorinated hydrocarbon pesticides, such as ddt, were introduced during world war ii to control insects in agricultural crops. all of the following statements about chlorinated hydrocarbons are true except: they persist for a long time in the environment. they are safe for all organisms except insect pests. they are inexpensive and easy to apply. they boost crop yields by killing pests.
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Chemistry, 22.06.2019 12:00
An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d
Answers: 3
Chemistry, 22.06.2019 17:30
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
Answers: 2
Chemistry, 22.06.2019 18:50
Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.
Answers: 1
Chlorinated hydrocarbon pesticides, such as ddt, were introduced during world war ii to control inse...
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