Hydrocarbons contain only hydrogen and carbon. true false

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample?