Chemical bonds
a. are always ionic.
b. combine compounds to form elements.
c. are always covalent.
d. hold atoms together to form compounds.

. a pyramid of numbers differs from an ecological pyramid because it
a. shows the amount of energy within each trophic level.
b. displays the number of organisms at each trophic level.
c. is organized by trophic levels, while an ecological pyramid isn't.
d. attempts to describe a food chain or food web.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

What is the independent variable in this investigation? mass volume sample number substance density

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.