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Teams
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10
×
What does "HPLC" stand for?
High Performance Liquid Chromatography
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15
×
State the electron domain, molecular shape, bond angle/s and polarity: [CO3]2-
3, trigonal planar, 120, non-polar
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seesaw
Swap points!
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gift
Win 15 points!
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fairy
Take points!
5
10
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25
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thief
Give points!
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25
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banana
Go to last place!
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rocket
Go to first place!
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shark
Other team loses 25 points!
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baam
Lose 20 points!
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15
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Explain the following trend in boiling points: CH4 < C2H6 < C3H8
All molecules are nonpolar = only dispersion forces = increase in mass = stronger dispersion forces = higher BP
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15
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State the electron domain, molecular shape, bond angle/s and polarity: [NH4]+
4, tetrahedral, 109.5, non-polar
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15
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State the electron domain, molecular shape, bond angle/s and polarity: BeI2
2, linear, 180, non-polar
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15
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What is the bond order of NO3-?
1.3
1.5
1
3
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15
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State the electron domain, molecular shape, bond angle/s and polarity: SO3
3, trigonal planar, 120, non-polar
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15
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State the electron domain, molecular shape, bond angle/s and polarity: PH3
4, trigonal pyramidal, 107, polar
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15
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Explain why CO is polar while CO2 is nonpolar.
O is more EN than C; CO has uneven distribution of e in bond, thus polar; CO2 is linear (symmetrical), charge distribution is even, thus non-polar
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banana
Go to last place!
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star
Double points!
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shark
Other team loses 25 points!
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thief
Give points!
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25
15
×
Which would have the highest Rf?
slightly non-polar
intermediate polarity
non-polar molecule
very polar
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15
×
State the electron domain, molecular shape, bond angle/s and polarity: H2S
4, bent, 104.5, polar
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10
×
Why is the melting point of HI higher than HBr?
HI has greater molar mass (more electrons) and so it has stronger dispersion forces than HBr
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10
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State the relationship between IMF and vapor pressure
A liquid with weak intermolecular forces evaporates more easily and has a high vapor pressure.
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