What is the mass in frames of 1.56! moles of aspertame

  =  459 g of Aspartame

1 mole of aspartame = 294.3 g

But;

Moles = mass/molar mass

Therefore;

Mass = moles × molar mass

         = 1.56 moles × 294.3 g/mol

        =  459 g of Aspartame

the temperature of the gas, in k, not celsius.