Which is a characteristic of mixtures?
a. they are chemically bonded together.

b. they can be classified as pure substances.

c. they have fixed ratios between their components.

d. they can be separated by physical processes.

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

How are isotopes of the same chemical element alike? how are they different?

Gwhich r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? which r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? −ch2−oh −ch2−o||c−nh2 −ch2−coo− −ch2−ch2−ch2−ch2−n+h3