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Describe each of the following compounds with as many of these words as apply: atom, molecule, pure substance, homogeneous mixture, heterogeneous mixture, element, solution.

-Table salt (sodium chloride or NaCl)
-Blue Cheese salad dressing
-Iron (Fe)

Table salt — pure substance

Blue cheese salad dressing — heterogeneous mixture

Iron (Fe) — pure substance, element, atom  

Explanation:

Table salt is a compound. It is not a mixture.

Blue cheese dressing usually consists of blue cheese, mayonnaise, sour cream, and other substances. You can see the different phases.

Fe can refer to an atom. Iron cannot be broken down into simpler substances.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

there are two significant figures.