Ethylene, a gas found in nature, is commonly used to ripen bananas and other fruits. Which compound is ethylene? 2 C H 2 are single bonded to each other, and both are single bonded to the same O.
A skeletal model with a chain beginning with O H, then line segments going up, down, up and ending at another O H.
2 carbons are double-bonded to each other; the pair are single bonded to H above left, above right, below right, and below left.
Two carbons are triple bonded to each other; each is single bonded to H to the outside.

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

How air particles exert a pressure on the inside of the balloon

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?