What is the mass of 5.00 mol of krypton in grams?

To find the mass of 5.00 moles of krypton (Kr), you multiply the number of moles by the molar mass of krypton. The molar mass of krypton is approximately 83.80 g/mol. Therefore, the mass of 5.00 mol of krypton is 5.00 mol × 83.80 g/mol = 419.00 grams.