Which of the following describes a heterogeneous mixture?
a) it can be separated by chemical means but not by physical means.
b) it cannot be separated by either chemical or physical means.
c) it can be separated by physical means and is uniform in composition.
d) it can be separated by physical means and is not uniform in composition.

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

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