Acompound is 80.0% carbon and 20.0% hydrogen by mass. assume you have a 100.-g sample of this compound. how many grams of each element are in this sample? enter the number of grams of carbon followed by the number of grams of hydrogen, separated by a comma (e. g., 30.0,70.0).

it's c. elements are placed in rows based on how may valencies electrons have.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?