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garik1379 [7]
3 years ago
9

. . A _____ change occurs when a substance changes phase.. . physical. chemical. nuclear

Chemistry
1 answer:
pishuonlain [190]3 years ago
5 0
A physical change is a change when a substance phases changes only. A chemical change is a change where a substance upon applying conditions or adding another substance to it, changes into a wholly new product. Hence the answer to this problem is physical change.
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Which of the following subject areas contains questions that can be answered by science? Alchemy Ethics Forensics Politics
Alika [10]

Answer:

Forensics.

Explanation:

That would be Forensics.  Clues  from a scene of a crime like clothing, blood and so on can be analysed  in the science laboratory , helping to solve the crime.

 Alchemy is not science, nor ethics nor politics.

6 0
4 years ago
Read 2 more answers
An organism contains chloroplasts in its cells which allows it to make its own food. What Kingdom is it in?
Alina [70]

Answer:

Plantae. Plants are multicellular and most don't move, although gametes of some plants move using cilia or flagella. Organelles including nucleus, chloroplasts are present, and cell walls are present. Nutrients are acquired by photosynthesis (they all require sunlight).

8 0
3 years ago
Which statement about atoms and molecules is
Pavel [41]

Elements always exist as pair of atoms called molecules .

Explanation:-

  • The material which has only one types of similar atoms called element .
  • Ex:-Sodium,Carbon etc
8 0
3 years ago
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the freezing point depression constants of the solvents cyclohexane and naphthalene are 20.1°C/m and 6.94°C/m respectively. Whic
Evgesh-ka [11]

Explanation:

It'd be better to use cyclohexane.  The possible explanation is that the freezing temperature will change by 20.1 degrees for each mole of substance added to 1 kg of cyclohexane, although the same amount added to naphthalene will change its freezing point just by 6.94 degrees.

It is so much easier to identify a larger change more adequately than a smaller one.  You would actually not have a 1 molal solution in operation, so the variations in freezing points would be even smaller than the ones already described.

7 0
3 years ago
6.0 L of gas in a piston at a pressure of 1.0 atm are compressed until the volume
alex41 [277]

Answer:

1.71atm

Explanation:

The following were obtained from the question:

V1 (initial volume) = 6L

P1 (initial pressure) = 1atm

V2 (final volume) = 3.5L

P2 (final pressure) =?

Using the Boyle's law equation:

P1V1 = P2V2, the final pressure can be obtained as follow:

P1V1 = P2V2

1 x 6 = P2 x 3.5

Divide both side by 3.5

P2 = 6/3.5

P2 = 1.71atm

The final i.e the new pressure inside the piston is 1.71atm

6 0
3 years ago
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