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VashaNatasha [74]
3 years ago
13

in a nuclear reaction, energy is released by the combination of two elements into a new element. this process is an example of

Chemistry
2 answers:
givi [52]3 years ago
4 0

19.   In a nuclear reaction, energy is released by the combination of two elements into a new element. This process is an example of  

     

  A. nuclear fission.  

  B. nuclear fusion.  

  C. artificial disintegration.  

  D. natural radioactivity


Answer B

horsena [70]3 years ago
3 0
<span>The correct answer to this question is that nucleaur fusion is the nuclear reaction in which energy is released by the combination of two elements, after which they become a new element. Nuclear fusion is the process through which two aroms are bonded, and therefore form a different, heavier nucleus.</span>
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FrozenT [24]

Answer:

0.100 M AlCl₃

Explanation:

The variation of boiling point by the addition of a nonvolatile solute is called ebullioscopy, and the temperature variation is calculated by:

ΔT = W.i

Where W = nsolute/msolvent, and i is the Van't Hoff factor. Because all the substances have the same molarity, n is equal for all of them.

i = final particles/initial particles

C₆H₁₂O₆ don't dissociate, so final particles = initial particles => i = 1;

AlCl₃ dissociates at Al⁺³ and 3Cl⁻, so has 4 final particles and 1 initial particle, i = 4/1 = 4;

NaCl dissociates at Na⁺ and Cl⁻ so has 2 final particles and 1 initial particle, i = 2/1 = 2;

MgCl₂ dissociates at Mg⁺² and 2Cl⁻, so has 3 final particles and 1 initial particle, i = 3/1 = 3.

So, the solution with AlCl₃ will have the highest ΔT, and because of that the highest boiling point.

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Katyanochek1 [597]
Grinding quartz crystals down to produce sand is an example of a?

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What is the correct balanced chemical equation for this reaction?
Lapatulllka [165]
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By what quantity must the heat capacity be divided to obtain the specific heat of that material
masha68 [24]
<span>Heat capacity of an object, is the amount of heat energy or thermal energy (unit: Joule) needed to raise the temperature of the object by 1 degree celsius. Unit of heat capacity is J/°C 

Larger object will surely need larger amount of thermal energy to raise its temperature. If you compare 1 litre of water with 0.5 litre of water, the 1L water will have two times the heat capacity. 

It will be more useful to compare specific heat capacity, because then it is the amount of heat energy or thermal energy (unit: Joule) needed to raise the temperature of 1 unit mass of the object by 1 degree celsius. You can then compare between 1 unit mass of water and 1 unit mass of iron. 
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The unit will then be J/(kg °C) or J/(g °C).
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What is the molarity of a solution made by dissolving 20.0 g of H3PO4 in 50.0 mL of solution
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(20*1000)÷(molecular weight of H3po4*50)

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