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Fynjy0 [20]
3 years ago
12

For a substance to change from a gas to a liquid the particles must _____

Chemistry
1 answer:
sveta [45]3 years ago
5 0

Answer:

The gas particles must touch a cold surface to start to slow down and get closer to form a liquid.

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In the following reaction, which compounds are considered acids ? NH3+H2O <—>NH4+OH
professor190 [17]

Explanation:

no compound there is considered an acid because this isn't a neutralization reaction ie between an acid and a base ,it didn't even form a salt

7 0
3 years ago
On what basis can mixtures be classified as solutions suspensions or colloids
FinnZ [79.3K]

Answer:

A mixture is classified as a solution when there is an homogeneous mixture of the two or more substances involved in a given medium.

A mixture is classified as a suspension when there is a heterogeneous mixture of undissolved particles in a given medium.

A mixture is classified as a colloid (false solution) when the individual solute Particles are larger than the particles of true solution, but they are not large enough to be seen by the naked eye. The solutes can scatter light rays.

7 0
3 years ago
The process that is the opposite of sublimation is called deposition. Use the example of frost formation to infer why this proce
Vedmedyk [2.9K]

Answer:

See explanation

Explanation:

Sublimation refers to the movement of molecules directly from solid into the vapor or gas phase while deposition refers to the movement of  molecules directly from the gas phase into the solid phase. The two are opposite to each other.

Frost is formed in a situation where a substance cools to a temperature that is lower than its dew point. In this situation, the vapour is directly deposited on a surface to form a frost without passing through a liquid phase. Hence the name, deposition.

7 0
3 years ago
Choose all the answers that apply. Models are used to observe phenomena which _____. happen too slowly} happen too quickly} are
erik [133]

<em>Answer:</em>

  • All of these answer are used in models.

<em>Explanation:</em>

The use of models is fundamentals tool in science. Scientists used the models to observe phenomena which happen too slowly, or happen too quickly or may to large or small process and how to extent it may dangerous for firsthand. They used different model depending upon whether which type of question is investigating.

8 0
3 years ago
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Flow chart for separation of silicon dioxide, cottonseed oil, water, sodium chloride, FDC red dye #3
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This flow chart may be used to separate the following substance:
a. silicon dioxide
b. cottonseed oil
c. water
d. sodium chloride
e. FDC red dye #3

8 0
3 years ago
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