Which is not a mixture?
A) a jar filled with rocks and sand
B) sea water
C) a glass of Kool-Aid
D) sodium chloride
Correct Answer:
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Q4: On a Periodic Table,the columns of elements
Q14: A substance that can be broken down
Q17: Which differentiates a compound from a mixture
Q20: The most numerous of the elements are
Q26: Which is not a pure substance?
A)helium
B)copper wire
C)air
D)sucrose
Q27: Which is not a single pure substance?
A)copper
B)water
C)brass
D)chlorine
Q28: The highest (or uppermost)layer of our atmosphere
Q29: The chemist,at about the time of the
Q33: Which squares contain mixtures? Q36: Although only about 100 elements exist,over _
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