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AURORKA [14]
4 years ago
14

System

Chemistry
1 answer:
alekssr [168]4 years ago
3 0

B 9.2

Explanation:

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OLga [1]
Well countries near the quitter of warmer than countries than the poles. So the mystery island would probably be near the equator near Florida or in Florida
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3 years ago
A substance is classified as an electrolyte because
liq [111]
The answer is (3) its aqueous solution conducts an electric current. The definition of electrolyte is a substance that will ionize when dissolved in suitable ionizing solvents such as water.
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Who are the scientists that contributed in arranging of the periodic table?
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7 0
3 years ago
Select the statements below that are false and think about why they are not true.
Anna007 [38]

Answer:

a) and d) are false.

Explanation:

a) The second law of thermodynamics states that t<u>he entropy of the universe increases in a spon taneous  process and remains unchanged in an equilibrium process.</u>

For a spontaneous process:

ΔSuniv = ΔSsys + ΔSsurr > 0

For a spontaneous process, the second law says that ΔSuniv must be greater than  zero, but it does not place a restriction on either ΔSsys or ΔSsurr. Thus, it is possible  for either ΔSsys or ΔSsurr to be negative, as long as the sum of these two quantities  is greater than zero.

d) <u>A  reaction that does occur under the given set of conditions is called a</u> spontaneous  reaction. We observe spontaneous physical and chemical processes every day,  including many of the following examples:

• A waterfall runs downhill, but never up, spontaneously.

• A lump of sugar spontaneously dissolves in a cup of coffee, but dissolved sugar  does not spontaneously reappear in its original form.

• Heat flows from a hotter object to a colder one, but the reverse never happens  spontaneously.

5 0
3 years ago
Is air a mixture give 3 reasons
solmaris [256]

Answer: https://van.physics.illinois.edu/qa/listing.php?id=1508&t=why-is-air-a-mixture

Explanation: The best reason I can think of for why we believe that air is a mixture is that freezing air slowly yields different liquids at different temperatures. Liquid nitrogen has a different boiling point than liquid oxygen. They also freeze at different temperatures. If air were only 1 compound, then air in its entirety would have a single boiling point and a single freezing point.  

Jason (w. mike)

air is not a mixture because of scientists freezing it and finding different liquids, it is a mixture because the compounds that make up air e.g. oxygen (o2), Carbon dioxide (co2) and the most important Nitrogen which is an element and makes up 78.09% of air are not chemically bound in the way that compounds are because they can be separated easily and there has been no change in state to any of the compounds or elements in air

6 0
3 years ago
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