What is the molecular formula for heptane?
A) C6H12
B) C6H14
C) C7H14
D) C7H16
E) C7H18
Correct Answer:
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Q195: An atom of 118Xe contains _ neutrons.
A)54
B)172
C)64
D)110
E)118
Q196: There are _ protons,_ electrons,and _ neutrons
Q197: What is the molecular formula for propane?
A)C2H8
B)C3H6
C)C3H8
D)C4H8
E)C4H10
Q198: 87 pm is the same as _
Q199: In the symbol below,x = _.
Q201: Which one of the following is a
Q202: How many electrons are there in one
Q203: Of the following,only _ is not a
Q204: The atomic number of an atom of
Q205: The element chlorine is in a group
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