Answer:
Xe = 0.431 mole
Kr = 0.569 mole
Explanation:
We are asked to calculate the mole fraction of each gas
Let's start from, what is mole fraction?
Mole fraction is the ratio of the number of moles of a substance to the total number of moles of all substance present in the mixture
In this question, we are provided with
Xe - 43.6g
Let's find the number of mole
n = m/Mm
n - number of mole
m - number of mass in grams
Mm - number of molar mass
The molar mass of Xe according to the periodic table is 131.293u
m - is given to be 43.6g
n = 43.6g / 131.293g/mol
n = 0.332mole
Secondly,
Kr - 36.8g
The molar mass of Kr is 83.798
m = 36.8
Using the same formula we used above to find mole
n = 36.8g / 83.798g/mol
n = 0.439mole
Let's calculate the total number of mole in the mixture
Total number of mole = 0.332 + 0.439
= 0.771 mole
To find each mole of each gas in the mixture, using this formula
Mole fraction of a gas = mole of gas A / total mole of the mixture
In Xe = 0.332 / 0.771
= 0.431 mole of Xe in the mixture of the gas
For Kr = 0.439 / 0.771
= 0.569 mole of Kr in the total mixture
