3 moles give energy = 36*10^ -13
energy given by per mole = (3/3.6* 10^ -13)
energy given per yr. = (3/3.6*10^ -13)* 10^6
now let 1kg gives .015 of D2 or 3/4 mole
so energy we need = 3/4(3/3.6*10^ -13)*10^6
got it now
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