Scientists can use chemicals to clean toxins from the soil. What does this show about chemicals?
A. Chemicals can be used to help the environment.
B. Scientists cannot predict the effect of chemicals on the
environment.
C. All chemicals are harmful to the environment.
D. Scientists have to fix the problems they cause by adding
chemicals to the environment.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Select all the correct answers. which compounds have the empirical formula ch20? (multiple answers)a. c2h4o2b. c3h603c. ch2o2d. c5h1005e. c6h1206

Do polar molecules have ionic bonds?