Which of the following describes a compound? (hint: carbon and oxygen both appear on the periodic table.)
oa
a piece of pure carbon, containing only carbon atoms
b. oxygen gas surrounding a solid piece of carbon
c. a substance made of two oxygen atoms for each carbon atom
d. carbon and oxygen atoms mixed without being bonded together
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If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

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.

Sand is more likely than shale to preserve fossils. true false