During a chemical reaction, a fixed amount of iron combines completely with a fixed amount of oxygen to form iron oxide. Which statement best describes the mass of the iron oxide that is produced? A. The mass is equal to the mass of the iron plus the mass of the oxygen.
B. The mass is greater than the combined mass of both the iron and the oxygen.
C. The mass is equal to the mass of the iron minus the mass of the oxygen before reacting.
D. The mass is less than the mass of the iron but greater than the mass of the oxygen before reacting.

what is this saying?

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.