Determine the number of moles of Br₂ in a sample consisting of 

(a) 4.04 x 10²² Br₂ molecules;

(b) 5.78 x 10²⁴ Br atoms (assuming that the Br atoms react completely to form Br₂); 

(c) 7.82 kg bromine; 

(d) 3.56 L liquid bromine (d = 3.10 g/mL).