Changes in Matter Answers

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The list below includes some of the properties of ammonia. Identify the physical properties in the list. Check all of the boxes that apply.

A
gas at room temperature
B
strong, unpleasant odor
C
reacts with hydrochloric acid
D
dissolves easily in water
E
burns in oxygen
2
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The list below includes some of the properties of butane, a common fuel. Identify the chemical properties in the list. Check all of the boxes that apply.

A
denser than water
B
burns readily in air
C
boiling point of –1.1°C
D
odorless
E
does not react with water
3

Question text not available

Answers:
sample B.:the same temperature as
sample A.:a larger mass than
sample B.:a smaller volume than
.:will also float in water
.:will also be attracted to a magnet
5

Sample B has the same mass as✔ a larger mass thana smaller mass than sample A.

A
the same mass as
B
✔ a larger mass than
C
a smaller mass than
6

Sample A has the same volume asa larger volume than✔ a smaller volume than sample B.

A
the same volume as
B
a larger volume than
C
✔ a smaller volume than
7

If sample A floats in water, sample B ✔ will also float in waterwill not float in watermay float in water, but more information is needed to know for sure.

A
✔ will also float in water
B
will not float in water
C
may float in water, but more information is needed to know for sure
8

If sample B is attracted to a magnet, sample A ✔ will also be attracted to a magnetwill not be attracted to a magnetmay be attracted to a magnet, but more information is needed to know for sure.

A
✔ will also be attracted to a magnet
B
will not be attracted to a magnet
C
may be attracted to a magnet, but more information is needed to know for sure
9

An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two ways he could change the metal chemically to try to identify it.

Answer:

Heat the metal until it melts and stretch it into a wire as physical changes. Attempt to react it with oxygen and acid as chemical changes.

10

Your answer may include the following changes. Select each of the changes that you included in your answer.

A
Heat the metal until it melts (physical change).
B
Attempt to react the metal with oxygen (chemical change).
C
Stretch the metal into a wire (physical change).
D
Attempt to react the metal with acid (chemical change).

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