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marissa [1.9K]
3 years ago
9

If a satellite or spaceship explodes in outer space, you can see the explosion from a distance but you cannot hear it. Why?

Chemistry
2 answers:
lidiya [134]3 years ago
7 0

Answer:The correct answer is option C.

Explanation:

Mechanical wave is a wave that produce from the oscillation of matter and transfer energy  through the medium.They are incapable of moving through vacuum.

Electromagnetic wave is a wave composed of two vectors vibrating perpendicular to each other in the same direction in which wave is moving.The two vectors are electric field and magnetic field.They are capable of travelling through vacuum.

Light wave is an electromagnetic wave.Electromagnetic waves can easily travel through space. Where as sound is a mechanical wave which requires medium to travel.

Hence, correct answer is option C.

labwork [276]3 years ago
3 0
<span>C) Sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave. 

There is no air for the sound waves to travel, therefore, no sound waves being transmitted. </span>
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35g of HF was prepared by reacting 112g of CaF2 with an excess of H2SO4 calculate the percentage yield
Tom [10]

Answer: 61%


The reaction equation should be

CaF2 + H2SO4 → 2HF + CaSO4

For every 1 molecule CaF2 used, there will be 2 molecules of HF formed. The molecular mass of CaF2 is 78/mol while the molecular mass of HF is 20g/mol. If the yield is 100%, the amount of HF formed by 112g CaF2 would be: 112g/(78g/mol) * 2 * (20g/mol)=57.43g

The percentage yield of the reaction would be: 35g/57.43g= 60.94%

7 0
3 years ago
Which method is appropriate for separating a mixture of iron and aluminum?
zalisa [80]
The method which is appropriate for separating a mixture of iron and aluminum is A. using a magnet.
This is because aluminum does not have magnetic properties (thus it will be unaffected by the magnet), so it is easy to sort out all iron from the mixture using a magnet.
5 0
3 years ago
Use atomic properties to explain the reduction of a less active metal by a more active one:(b) in the molten state. Give a speci
Bad White [126]

The reduction of a less active metal by a more active one is called metal displacement reactions. For example:

Fe + CuSO4 → FeSO4 + Cu

<h3>What is metal displacement reaction? </h3>

Displacement reactions is a reaction which includes a metal and the compound of a other metal. A more reactive metal will push or displace out a less reactive metal from its compound in this displacement reaction. The metal which is less reactive left uncombined after the reaction.

As we know that, electrons are the basis of the chemical reactions. If chemical compound or element A is more easily oxidized than B, then according to the terms of the activity series, the elements which are more easily oxidized can react with more chemicals, since they are able to act as a reducing agents for more chemicals.

Since, Metal ions are positively charged ions as they lose electrons. Some metals give up their electrons more readily than others and become more reactive.

Thus, we concluded that the reduction of a less active metal by a more active one is called metal displacement reactions. For example:

Fe + CuSO4 → FeSO4 + Cu

learn more about metal displacement reaction:

brainly.com/question/11777638

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6 0
1 year ago
Which of the following is not a organic compound, a -corn oil b -b r o m i n e c -m e t h a n e d- protein
Flura [38]
A corn oil. Because oil is treated with a solvent. After that it is refined which gets rid of free fatty acids. Finally, it is sent through steam distillation to get rid of volatile organic compounds.
6 0
3 years ago
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One of the biggest dangers of storms that produce heavy rains or storm surges is ___.
Lubov Fominskaja [6]

Answer:

B. Flooding

Explanation:

Flooding can be caused by heavy rains/storm surges. Hope this helped!

4 0
2 years ago
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