A chemical change occurs when which of the following is true A) a substance is dissolved in water
B) you can separate the materials back to their original state
C) bibbles or fizz occur
D) light is reflected off the materials

C) bubbles or fizz occurs

Explanation:

Chem. Change:

-energy is absorbed or released (temperature changes-hotter or colder), color changes, Gas production (bubbling, fizzing, or odor change; smoke).

-Formation of a Precipitate - a solid that separates from solution (won't dissolve)

-Irreversibility - not easily reversed.

bc blah

explanation:

bc blah

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.