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Dennis_Churaev [7]
3 years ago
12

The characteristics of two different types of reactions are shown below: Reaction A: Electrons are gained by the atoms of an ele

ment. Reaction B: Protons are lost by the atom of an element. Which statement is true about the atoms of the elements that participate in the two reactions? (5 points) Their identity changes in both Reaction A and Reaction B. Their identity changes in Reaction A but not in Reaction B. Their identity changes in Reaction B but not in Reaction A. Their identity remains the same in both Reaction A and Reaction B.
Chemistry
2 answers:
BabaBlast [244]3 years ago
5 0

Answer:

b

Explanation:

because it seems right

Inessa05 [86]3 years ago
4 0

Answer:

Their identity changes in Reaction B but not in Reaction A.

Explanation:

Reaction A describes a chemical reaction. Chemical reactions change the structures of substances and cause a gain or loss of electrons. Gaining or losing electrons will not change the identity of an atom.

Reaction B describes a nuclear reaction, which either splits the nucleus apart or combines two smaller nuclear.  Nuclear reactions cause a gain or loss of protons and neutrons by the atom of an element, thereby changing its identity.

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Answer:

Step 1 of 6

(a)

The mass of benzene is  , so calculate the moles of benzene as follows:



The mass of toluene is, so calculate the moles of toluene as follows:



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Therefore, the mole fraction of benzene and toluene is  and  respectively.

Step 2 of 6

(b)

The formula to calculate the partial pressure is as follows:



Here,  is the partial pressure of benzene,  is the vapour pressure of pure benzene and  is the mole fraction of benzene.

Vapour pressure of pure benzene at  is.

Substitute the values in the equation as follows:



Therefore, the partial pressure is  .

Step 3 of 6

(c)

Vapor pressure of the solution at 1 atm is  .

When the total pressure of the vapour pressure of the mixture is  at a temperature, then, the solution boils. It corresponds to the boiling point of the solution.

Calculate the total pressure of the solution at  as follows:



Since, the total pressure is less than the atmospheric pressure, the solution will not boil at  .

Calculate the total pressure of the solution at  as follows:



Since, the total pressure is greater than the atmospheric pressure, the solution will boil at  .

Therefore, the boiling point of the solution is  .

Step 4 of 6

(d)

Mole fraction of benzene at  is calculated as follows:



Mole fraction of toluene at  is calculated as follows:



Therefore, the mole fractions of benzene and toluene are  and  respectively.

Step 5 of 6

(e)

Vapor pressure of benzene at  is  .

Partial pressure of benzene is calculated as follows:



Vapor pressure of toluene at  is  .

Partial pressure of toluene is calculated as follows:



Step 6 of 6

Weight composition of the vapour that is in equilibrium with the solution is calculated as follows:



Weight composition of the vapour that is in equilibrium with the solution is calculated as follows:



Explanation:

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Answer:

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