Chemistry, asked by Venuvenuvenu2307, 9 months ago

N a solution we have 2 mol of substance a. 2 mol of substance b, and 7 mol of substance c. find the mole fraction of substance c?

Answers

Answered by Anonymous
24

Question :

In a solution,we have 2 moles of substance A,2 moles of substance B and 7 moles of substance C. Find the Mole Fraction of substance C

Answer :

Mole Fraction of substance C is 0.63

There are,

  • 2 moles of substance A

  • 2 moles of substance B

  • 7 moles of substance C

We have to find the Mole Fraction of substance C

Firstly,we would need to calculate the number of moles of solution.

No.of Moles of Solution = 2 + 2 + 7

No.of Moles of Solution = 11

Mole Fraction is given as :

 \sf \: Mole \ Fraction =  \dfrac{X_{component}}{X_{solution}}

Now,

 \sf \: Mole \ Fraction  =  \dfrac{ X_C}{X_{solution}} \\  \\  \longrightarrow \:  \sf \: Mole \ Fraction =  \dfrac{7}{11}  \\  \\  \longrightarrow \:  \boxed{ \boxed{ \sf Mole \ Fraction = 0.63}}

Answered by Anonymous
18

\huge\sf{Answer:}

Given:

⇏ In a solution we have 2 mol of substance A, 2 mol of substance B and 7 mol of substance V.

Find:

⇏ Find the mole fraction of substance C.

According to the question:

⇏ 2 moles = A

⇏ 2 moles = B.

⇏ 7 moles = C.

We know that:

\sf Mole  \: fraction = \dfrac{X_ Component}{X_Solution}

\sf Mole \: fraction =  \dfrac{2 + 2 + 7}{11}

\sf Mole \: fraction = \dfrac{7}{11}

{\sf{\underline{\boxed{\sf{Mole\: fraction = 0.63}}}}}

Therefore, 0.63 is the mole fraction of substance C.

ADDITIONAL EXPLANATION:

⇏ According to the question we must find the mole fraction for substance C so to find the mole fraction we must add the other moles of substance A, B. So,

\sf \dfrac{Total\: number \:of \:moles}{X_solution\: (Mole\: 7\: of \:substance \:C)}

We get our answer, {\sf{\underline{\boxed{\sf {\dfrac{7}{11}= 0.63}}}}}

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