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oee [108]
3 years ago
5

By what process do electromagnetic waves release from the materials they contact?

Chemistry
1 answer:
Rudik [331]3 years ago
5 0

Answer:

The photoelectric effect

Explanation:  hope it helps

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In this experiment you will create solutions with different ratios of ethanol and water. What is the mole fraction of ethanol wh
Andrej [43]

Answer:

The mole fraction of ethanol is 0.6. A 10 mL volumetric pipette must be used for to measure the 10 mL of ethanol. The vessel should be clean and purged.

Explanation:

For calculating mole fraction of ethanol, the amount of moles ethanol must be calculated. Using ethanol density (0.778 g/mL), 10 mL of ethanol equals to 7.89 g of ethanol and in turn 0.17 moles of ethanol. The same way for calculate the amount of water moles (ethanol density=0.997 g/mL). 2 mL of water correspond to 0.11. The total moles are: 0.17+0.11=0.28. Mole fraction alcohol is: 0.17/0.28=0.6

5 0
3 years ago
When water vapor changes to a liquid what is it called
Mademuasel [1]

Answer:

hello \: your \: answer \: is \: here.

Explanation:

<h2>Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.</h2>
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5 0
3 years ago
E
Nana76 [90]
Hey :)

Air pollution

Hope this helps!

Good luck in your test :)
7 0
3 years ago
Read 2 more answers
Is soil a pure or impure substance?​
irinina [24]
Impure substance, because pure would be dirt from the earth
5 0
3 years ago
Read 2 more answers
Which formula can be used to find velocity if kinetic energy and mass are known?
astraxan [27]

Answer:

v =  \sqrt{ \frac{2ke}{m} }

option D is the correct option.

Here,

If an object of mass 'm' moving with a velocity'v' then,

kinetic \: energy =  \frac{1}{2} m {v}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:    {v}^{2}  =  \frac{2ke}{m}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  {v}^{2}  =  \sqrt{ \frac{2ke}{m} }

hope this helps...

Good luck on your assignment..

5 0
3 years ago
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