6,938.72 g
To find the mass in grams of 52.9 moles of Xenon, multiply the number of moles (52.9) by the molar mass of Xenon. The molar mass of Xenon is 131.293 g/mol. So, 52.9 moles of Xenon would have a mass of:
52.9 moles * 131.293 g/mol = 6,938.72 grams