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DiKsa [7]
4 years ago
15

Explain why mixing two, or more, substances is a physical change.

Chemistry
1 answer:
Strike441 [17]4 years ago
4 0
<span>When two or more substances are mixed together but not chemically joined they are called as mixtures. Therefore, it is only a physical change taking place.
</span>
I hope this helps you! Good luck :)
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Which of the following is the correct definition of radiant energy?
torisob [31]

Answer:

energy that is transmitted in the form of electromagnetic waves.

Explanation:

Radiant energy is the energy of electromagnetic waves. It is a form of energy that can travel through space. For example, we receive the heat from the sun, which is located very far from the earth via radiation. The sun's heat is not transmitted through any solid medium, but through a vacuum.

6 0
3 years ago
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Ethanol (c2h5oh) melts at -114°c. the enthalpy of fusion is 5.02 kj/mol. the specific heats of solid and liquid ethanol are 0.9
maria [59]
You'll want to add three amounts of heat. 

(1) Specific heat of lowering the temperature from -135°C to the melting point -114°C
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(1) E = mCΔT = (25 g)(0.97 J/g·°C)(1 kJ/1000 J)(-114 - -135) = 0.509 kJ
(2) E = mΔH = (25 g)(5.02 kJ/mol)(1 mol/46.07 g ethanol) = 2.724 kJ
(3) E = mCΔT = (25 g)(2.3 J/g·°C)(1 kJ/1000 J)(-50 - -114) = 3.68 kJ

<em>Summing up all energies, the answer is 6.913 kJ.</em>
7 0
3 years ago
1. What do microorganisms share in common?​
alexgriva [62]

Answer:

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3 years ago
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What is the definition of geosphere
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Hope this helps... If you could, could you mark my answer as brainliest? I'm trying to level lol 
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3 years ago
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