Carbon (c) and hydrogen (h) are pure substances.  each is made of only one type of atom, but carbon atoms are different from hydrogen atoms.  carbon and hydrogen chemically combine to form methane (ch4).

based on this information,

  a. 

methane is an element and carbon and hydrogen are compounds.

  b. 

carbon and hydrogen are elements and methane is a compound.

  c. 

carbon, hydrogen, and methane are all compounds.

  d. 

carbon, hydrogen, and methane are all elements

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.

Lewis structure and molecular geometry for nh2cl

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable