Phase Changes 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
6

Sample B has sample A.

Answer not available
7

Sample A has sample B.

Answer not available
45

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.

46

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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