87 pm is the same as ________ Angstroms.
A) 870
B) 8.7
C) 87
D) .87
E) .087
Correct Answer:
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Q193: How many carbon and hydrogen atoms are
Q194: What is the formula for perchloric acid?
A)HClO
B)HClO3
C)HClO4
D)HClO2
E)HCl
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
Q199: In the symbol below,x = _.
Q200: What is the molecular formula for heptane?
A)C6H12
B)C6H14
C)C7H14
D)C7H16
E)C7H18
Q201: Which one of the following is a
Q202: How many electrons are there in one
Q203: Of the following,only _ is not a
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