Which of the following substances are composed of heteroatomic molecules?
A) an iron nail
B) oxygen
C) copper wire
D) water
Correct Answer:
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Q15: After heating, a pure substance, A, is
Q16: The weight of an object is
A)a measure
Q17: Which of the following terms correctly applies
Q18: The melting of ice to liquid water
Q19: The fact that gold does not corrode
Q21: Do the following calculation, and express the
Q22: How many significant figures are used in
Q23: The prefix centi- denotes what fraction of
Q24: Convert a temperature of 76 ° F
Q25: Which of the following consists of a
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