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mihalych1998 [28]
3 years ago
14

Which of the following can be characterized as a physical change?

Chemistry
1 answer:
Taya2010 [7]3 years ago
7 0

Answer:

D. Sweat evaporates from your skin

Explanation:

A physical change is a reversible process, no new substance is formed. A physical change does not affect the chemical composition of a substance.

Sweat evaporation from the skin is a physical change, because the change that occur is merely a change of state, Liquid to Gaseous state, no new substance is formed.

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The movement of the liquid in a thermometer shows changes in temperature. An increase in temperature indicates the molecules in
olya-2409 [2.1K]

Answer:

2: Moved faster and spread farther apart.

Explanation:

Restate the question: The movement of the liquid in a thermometer shows changes in temperature. An increase in temperature indicates the molecules in the liquid.

1. moved slower and closer together.

2.moved faster and spread farther apart.

3. contracted in size when heated.

4. expanded in size when heated.

Water that is cold does not have the energy to bounce of the walls, instead it is like a group of animals they group together for the warmth of the others when it gets really cold.

So it cant be 1.

We all know that power lines sag lower on a hot day (or a tire for a car, it has increases pressure). but those are different types of molecules.

So that rules out 3 and 4.

Which leaves you with 2.

The increase in temperature causes the water molecule to gain energy and move quickly, which resulted in water molecule that are farther apart and an increase in water volume.

Hope it helps!

7 0
2 years ago
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What factor, according to the data in the table above, has the greatest impact on species loss?
Finger [1]
B. The area of the island is your answer :)
6 0
1 year ago
In water acids form ___.
UkoKoshka [18]

Answer:

Hydrogen ions

Explanation: acids will produce hydrogen ions, I asked my teacher. Please tell me if we are wrong.

6 0
3 years ago
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What is the density of 1.00 mol of carbon monoxide gas at STP?
Ksju [112]

Answer:

Density = mass / volume.

If this is an ideal gas then 1mol will take up 22.4L of volume (fact about ideal gases you should remember)

Since you have 1mol then you know the volume of the gas that you have (22.4L)

Now, just convert 1mol of CO to grams.The ptable tells you that the mass of 1 mol of C is 12g and the mass of 1 mol of O is 16g. So the mass of 1 mol of CO is......... :):)

Now you have the mass and the volume, so just divide :) enjoy

6 0
2 years ago
During a science investigation, a sample of matter breaks down into two kinds of atoms. Was the original sample an element or a
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The original sample was a compound because it was composed of two different elements and was not purely one element
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2 years ago
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