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Sati [7]
3 years ago
11

!!DOUBLE QUESTION! HURRY! 50 PTS AND BRAINLIEST!!

Chemistry
1 answer:
Oksana_A [137]3 years ago
7 0

<u>So basically the wavelength times the frequency of an electromagnetic wave equals the speed of light. </u>

<u> </u>

<u>FYI,  </u>

<u>λ </u>

<u> is the Greek letter lambda , and  </u>

<u>ν </u>

<u> is the Greek letter nu (it is not the same as a v).</u>



<u>Answer:  </u>

<u>Type of Radiation Frequency Range (Hz) Wavelength Range </u>

<u>gamma-rays 1020 - 1024 < 10-12 m </u>

<u>x-rays 1017 - 1020 1 nm - 1 pm </u>

<u>ultraviolet 1015 - 1017 400 nm - 1 nm </u>

<u>visible 4 - 7.5*1014 750 nm - 400 nm </u>

<u>near-infrared 1*1014 - 4*1014 2.5 μm - 750 nm </u>

<u>infrared 1013 - 1014 25 μm - 2.5 μm </u>

<u>microwaves 3*1011 - 1013 1 mm - 25 μm </u>

<u>radio waves < 3*1011 > 1 mm</u>


<u>(Ultraviolet I believe, not sure)</u>

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A white crystalline salt conducts electricity when it is melted and when it dissolves in water.
sergeinik [125]

Answer: Option (a) is the correct answer.

Explanation:

Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.

So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.

As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.

Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.

Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.

7 0
3 years ago
Convert 0.0052 meters to millimeters
amm1812

Answer:

5.2 millimeters

Explanation:

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5 0
3 years ago
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Two aircraft rivets, one of iron and the other of copper, are placed in a calorimeter that has an initial temperature of 10°c.
Dominik [7]

a) Copper is at a higher temperature, so the flow of heat will take place from copper to iron. Heat is a form of energy, which always flows from higher temperature to lower temperature.  

b) To determine the actual final temperature, the heat capacity of the calorimeter must be known. A calorimeter constant refers to a constant, which quantifies the heat capacity of a calorimeter. It may be determined by using a known amount of heat to the calorimeter and measuring the corresponding change in temperature of the calorimeter.  


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Describe the kinetic, potential and thermal energy of each state of matter?
Lerok [7]

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Particles of matter possess energy called kinetic energy.

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6 0
3 years ago
Determine the concentration of a solution prepared by diluting 20.0 ml of a 0.200 m rbcl to 250.0 ml. determine the concentratio
pogonyaev
When dealing with making diluted solutions from concentrated solutions, we can use the following formula 
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where c1 and v1 are the concentration and volume of the concentrated solution respectively.
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5 0
3 years ago
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