What volume does 7.50 × 1020 molecules of O2 occupy at STP?
A) 22.4 L
B) 1.68 × 1022 L
C) 0.0279 L
D) 2.79 L
Correct Answer:
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Q23: Three of the four phase changes below
Q24: Which molecule(s)exhibit hydrogen bonding?
A)H2S
B)CH4
C)NH3
D)HCl
E)All of the molecules
Q25: Butane,CH3CH2CH2CH3,has the structure shown below. What is
Q26: Which is an ionic solid?
A)KCl
B)Cu
C)SiO2
D)Rubber
E)Polyethylene
Q27: Which is a molecular solid?
A)MgCl2
B)Au
C)Glass
D)Graphite
E)Sucrose (C12H22O11)
Q29: The normal boiling point of a liquid
Q30: A sample of gas contains four gases
Q31: Consider the two liquids A and B
Q32: Which phase change below is endothermic?
A)Deposition
B)Melting
C)Condensation
D)Freezing
Q33: Propanol,CH3CH2CH2OH,has the structure shown below. What is
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