When hydrochloric acid is dripped onto marble, bubbling is observed while dripping hydrochloric acid onto granite does not lead to bubbling. Based on these observations, what compound may be a component of marble but not granite?

Calcium carbonate

Explanation:

Marble is mainly composed of calcium carbonate.

When hydrochloric acid is dipped on the marble a reaction occurs between the carbonate group of the calcium carbonate and hydrochloric acid which results in the formation of carbon dioxide. The bubble which are seen are of this carbon dioxide gas.

Granite is mainly composed of quatrz and feldspar and no carbonate is found in the granite that's why there are no bubbles of carbon dioxide released when hydrochloric acid is dropped on to the granite.

explanation:

the largest database of organic compounds lists about 10 million substances, which include compounds originating from living organisms and those synthesized by chemists. the number of potential organic compounds has been estimated at 1060—an astronomically high number. the existence of so many organic molecules is a consequence of the ability of carbon atoms to form up to four strong bonds to other carbon atoms, resulting in chains and rings of many different sizes, shapes, and complexities. the simplest organic compounds contain only the elements carbon and hydrogen, and are called hydrocarbons. even though they are composed of only two types of atoms, there is a wide variety of hydrocarbons because they may consist of varying lengths of chains, branched chains, and rings of carbon atoms, or combinations of these structures. in addition, hydrocarbons may differ in the types of carbon-carbon bonds present in their molecules. many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. we use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil. the familiar plastics polyethylene, polypropylene, and polystyrene are also hydrocarbons. we can distinguish several types of hydrocarbons by differences in the bonding between carbon atoms. this leads to differences in geometries and in the hybridization of the carbon orbitals.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).