Mole fraction for silver= 0.2317643/0.3079193
= 0.7526787
Mole fraction for gold=0.076155/0.3079193
=0.2473212
What is Molar Fraction?
The mole fraction is the product of the number of molecules of a specific component in a mixture and its total molecular weight. It serves as a means of indicating how concentrated a solution is.
It is a unit of concentration, defined as the product of the moles of a component and the moles of the entire solution. When all the parts of a solution are summed up, their mole fraction equals 1.
molar mass of silver = 107.8682g/mol
Molar mass of gold= 196.96657g/mol
Therefore mole = mass/molar mass
For silver: 25g/107.8682g/mol = 0.2317643mol
For gold: 15g/196.96657g/mol= 0.076155mol
Total number of mole= 0.2317643+0.076155
= 0.30791193mol
Mole fraction for silver= 0.2317643/0.3079193
= 0.7526787
Mole fraction for gold=0.076155/0.3079193
=0.2473212
Learn more about Mole Fraction from given link
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