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WorksheetsUnit 3 Review
Total questions: 15
Worksheet time: 34mins
Molarity (M) = moles of solute / _________________________.
kilogram of solvent
liter of solvent
kilometer of solvent
ounces of solvent
Which of the following best justifies why chalk (calcium carbonate) has a higher melting point than motor oil (a large compound containing only carbon and hydrogen.)
the motor oil has very strong London dispersion forces
calcium carbonate has dipole-dipole attractions which are much stronger than the London dispersion forces found in motor oil.
motor oil has hydrogen bonding but it is not as strong as the dipole-dipole forces in chalk
Which among the following is true about Kinetic Molecular Theory?
Gases do not move in straight line.
Most of the volume of gas is empty space.
Gas particles are not in constant random motion.
Gas particles attract each other.
Ink can be separated by a method of -----------------------------------------------
distillation
filtration
chromatography
sedimentation
PV=nRT
How many moles of NH3 are in a 3.0 L solution of a 0.23 M NH3.
0.69 mol
13 mol
0.077 mol
Which of the following is most likely to be a covalent network solid?
H2O
LiCl
SiO2
NH3
2.45 mole of LiBr is dissolved to make a 0.750 L of solution. What is the molarity?
3.27 M
0.306 M
0.0376 M
A spectrophotometer can be used to (check all that apply):
determine the presence of a substance in a solution.
measure the concentration of an unknown solution.
determine the molecular composition of an unknown substance.
identify an unknown substance
Which condition is necessary for most gases to behave nearly ideally?
high pressure
high temperature
low compressibility
low expansion
Which of the following substances has dipole-dipole attractions?
NH3
SiO2
MgCl2
F2
