To calculate the mass of sodium hydroxide in a 6.94 mole sample, we need to use the molar mass of sodium hydroxide. The molar mass of sodium hydroxide (NaOH) is approximately 40.0 g/mol.

Mass = Moles × Molar Mass

Mass = 6.94 moles × 40.0 g/mol

Mass = 277.6 g

Therefore, there are 277.6 grams in a 6.94 mole sample of sodium hydroxide.