Answer: 131 grams
Explanation:-
According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles of neon}=\frac{20g}{20g/mol}=1mole[/tex]
Thus 1 mole of Xenon will occupy the same volume as 1 mole of Neon.
Mass of xenon=[tex]moles\times {\text {Molar mass}}=1\times 131g/mol=131g[/tex]
