Three of the four phase changes below are endothermic. Which phase change is NOT endothermic?
A) Vaporization
B) Sublimation
C) Condensation
D) Melting
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Q18: Consider the balanced reaction: Zn(s)+ 2 HCl(aq)→
Q19: The temperature of a 0.750-L gas sample
Q20: An aerosol can has a pressure of
Q21: Which molecule(s)exhibit London dispersion forces?
A)Kl
B)CH4
C)NH3
D)HBr
E)All of the
Q22: Surface tension measures which of the following?
A)A
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)
Q28: What volume does 7.50 × 1020 molecules
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