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LiRa [457]
3 years ago
7

ipt A wall that was once white is painted black. Which of the following is definitely true of the painted wall? A. Its chemical

properties have changed. B. Its physical properties have changed. C. Both its physical properties and chemical properties have changed. D. None of its characteristic properties have changed.​
Chemistry
2 answers:
Delvig [45]3 years ago
4 0
The answer would be C
Hope this helps
Julli [10]3 years ago
3 0

Answer:

B It's physical properties changed

Explanation:

Because they painted the outside

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the vapor pressure of a naqueous solution is found to be 24.9 mmgh at 25C. what is the mole fraction of solute in this solution?
Gekata [30.6K]

Answer:

Mole fraction of solute is 0.0462

Explanation:

To solve this we use the colligative property of lowering vapor pressure.

First of all, we search for vapor pressure of pure water at 25°C  = 23.8 Torr

Now, we convert the Torr to mmHg. Ratio is 1:1, so 23.8 Torr is 23.8 mmHg.

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ΔP = P° . Xm

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2 years ago
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What is the energy of a light wave with a frequency of 9.8 x 10^20 Hz?
Wewaii [24]

Answer:

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