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

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f