How to name this compound- (CCl3)3CCl?

It's name is 2-(Trichloromethyl)-1,1,1,2,3,3,3-heptac... but I don't know how to name it.Please help

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane