What is a semiconductor? A. A substance that completely blocks the flow of electricity. B. A conductor that conducts electricity faster than common metals. C. A conductor that operates only at low temperatures. D. A conductor that has less conductivity than do metallic conductors.

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.