Atomic Theory — Unit test Answers

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What is the density of a 700 kg object with a volume of 649 m3? (Density: D = )

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A
0.927 kg/m3
B
.4543 kg/m3
C
1.079 kg/m3
D
4.543 kg/m3
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A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple liquid are all added into the column. This chart shows the densities of the liquids.In what order would the liquids arrange themselves, from top to bottom?

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A
blue, red, purple, green.
B
purple, green, red, blue.
C
purple, green, blue, red.
D
blue, red, green, purple.
23

The density of solid aluminum is 2.70 g/cm3. If a 1g piece of aluminum is dropped in a cup of water, what will happen to the aluminum? (The density of water is 1.00 g/cm3.)

A
It will sink to the bottom.
B
It will float to the top.
C
It will hover in the middle.
D
It will move up and down.
24

Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance.Which statement can be known about the behavior of the atoms in each container?

A
The atoms in the solid would be moving vigorously around the container.
B
The atoms in the liquid would be vibrating in position.
C
The atoms in the solid would be vibrating in position.
D
The atoms in the gas would be moving slowly around the container.
25

Liquid plastic is frozen in a physical change that increases its volume. What can be known about the plastic after the change?

A
Its mass will increase.
B
Its density will increase.
C
Its mass will remain the same.
D
Its density will remain the same.

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