What describes the relationship between elements and compounds? Group of answer choices

A. Carbon changes to Oxygen to form a compound

B. A few elements can combine to form a compound

C. Carbon is always a part of a compound

D. A few compounds combine to form an element

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?