Which of the following correctly describes a mixture? (4 points) The particles are chemically bondeg together, and they retain their individual physical and chemical pro
The particles are not chemically bonded, and they can only combine in certain set ratios.
The particles do not retain their individual chemical properties, and they can only be separated by chemi
The particles have no set ratio for how to combine, and they can be separated by physical means.

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.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Which of the following is true regarding chemical and nuclear reactions?