Give an example of a covalent bond.

Enthalpy is the heat content of a system at constant pressure. a. True b. False

What is the repeating unit in the polymer - ch2-ccl2-ch2-ccl2-ch2-ccl2 - ?

What is the difference between the number of electrons in an atom of selenium?

How many moles of HCL are in 20 ml sample of. 10 M HCL

What is the oxidation number of Ni in NiO

The pH of a solution is 2.60. What is the [H3O+] for the solution? 2.51 * 102 M 3.98 * 102 M 2.51 * 10-3 M 3.98 * 10-3 M

there are 25 elements found in living things. how many of these elements are found in some organisms but not at all?

What is every stored in atomic bonds called

What happens to energy when Sally kicks a soccer ball? A. Kinetic energy is transformed to chemical energy in muscles. B. Potential energy is transformed to chemical energy in muscles. C. Kinetic energy is transferred from the leg to the soccer ball.

6. Which of the following statements correctly describes what happens to the diaphragm during an inhalation, when the lungs inflate? O A. The diaphragm returns to its resting state. O B. The diaphragm contracts and flattens. O C.