Unit Test — Unit test Answers
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Which molecular characteristics would most likely cause a liquid to have the lowest viscosity?
A
Large molecules with strong intermolecular attractionsB
Small molecules with weak intermolecular attractionsC
Small molecules with strong intermolecular attractionsD
Large molecules with weak intermolecular attractions22
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Which description best characterizes the motion of particles in a solid?
A
slow but able to move past one anotherB
fast and widely spacedC
not movingD
vibrating around fixed positions23
Which of these is an example of a physical change?
A
sugar dissolving in warm waterB
iron rusting in the presence of moist airC
wood burning in the presence of oxygenD
baking soda reacting with acid to form a gas24
The particles in water have less mobility than the particles in oxygen. Which statement best explains this observation?
A
Water is always colder than oxygen.B
Water has a lower density than oxygen.C
Water particles have a greater kinetic energy.D
Water particles have strong intermolecular forces.25
Consider the temperature versus time graph below.At what temperature is the boiling point of this substance?
A
at 0°CB
between 0°C and 100°CC
at 120°CD
above 120°CDid you find these answers helpful?
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