All organic compounds are characterized by the presence of ____.
A) carbon
B) hydrogen
C) oxygen
D) nitrogen
E) phosphorus
Correct Answer:
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Q8: When a natural system gets locked into
Q10: Hydrocarbons are organic compounds.
Q11: Two or more different elements can combine
Q19: A scientific hypothesis must be testable.
Q22: A scientific law _.
A) is a hypothesis
Q23: A tiny, tawny colored butterfly called the
Q24: Scientific hypotheses and results that have not
Q26: A tiny, tawny colored butterfly called the
Q27: A classmate tells you that a statement
Q32: Matter is best described as _.
A) thermodynamic
B)
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