Which of the following represents a pair of allotropes?
A) air and oxygen
B) glucose and sucrose
C) graphite and diamond
D) sand and glass
E) carbon monoxide and carbon dioxide
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Q38: Bacteria, sugar molecules, and water droplets are
Q39: Which of the following substances is homogeneous?
A)
Q40: Which state of matter has no definite
Q41: A mixture that is nonuniform in composition
Q42: Which of the following is not a
Q44: How many of each type of atoms
Q45: Which of the following is a metal?
A)
Q46: An element which has some properties of
Q47: Water droplets, water molecules, and H2O are
Q48: Which of the following is not the
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