A nonburning helium core surrounded by a shell of hydrogen-burning gas characterizes the subgiant stage of stellar evolution. As time goes on, the star continues to evolve, and eventually, it becomes a red giant. Rank the stages a star goes through as it evolves from a subgiant into a red giant, from latest to earliest. Rank the stages a star goes through as it evolves from a subgiant into a red giant, from latest to earliest. a. The shell of hydrogen surrounding the star's nonburning helium core ignites. b. Pressure in the star's core decreases. c. Pressure from the star's hydrogen-burning shell causes the nonburning envelope to expand. d. The star's nonburning helium core starts to contract and heat up. e. The star becomes a red giant. f. The surface of the star becomes brighter and cooler.

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)