The mass number of an atom of 128Xe is __________.
A) 54
B) 182
C) 74
D) 128
E) 120
Correct Answer:
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Q173: The formula for zinc phosphate is Zn3(PO4)2.What
Q191: What is the molecular formula for propane?
A)C2H8
B)C3H6
C)C3H8
D)C4H8
E)C4H10
Q194: What is the formula for perchloric acid?
A)HClO
B)HClO3
C)HClO4
D)HClO2
E)HCl
Q196: What is the molecular formula for heptane?
A)C6H12
B)C6H14
C)C7H14
D)C7H16
E)C7H18
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