Answer: The concentration of neon in air is 18.14 ppm
Explanation:
We are given:
Mole fraction of neon = [tex]2.6\times 10^{-5}[/tex]
This means that [tex]2.6\times 10^{-5}[/tex] moles of neon are present
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
Molar mass of neon = 20.2 g/mol
Moles of neon = [tex]2.6\times 10^{-5}[/tex] moles
Putting values in above equation, we get:
[tex]2.6\times 10^{-5}mol=\frac{\text{Mass of neon}}{20.2g/mol}\\\\\text{Mass of neon}=(2.6\times 10^{-5}mol\times 20.2g/mol)=5.252\times 10^{-4}g[/tex]
ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.
To calculate the ppm of oxygen in sea water, we use the equation:
[tex]\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6[/tex]
Both the masses are in grams.
We are given:
Mass of neon = [tex]5.252\times 10^{-4}g[/tex]
Mass of solution (air) = 28.96 g
Putting values in above equation, we get:
[tex]\text{ppm of neon in air}=\frac{5.252\times 10^{-4}}{28.96}\times 10^6\\\\\text{ppm of neon in air}=18.14ppm[/tex]
Hence, the concentration of neon in air is 18.14 ppm
