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What is the mass of : (a) 1 mole of ni...

What is the mass of :
(a) 1 mole of nitrogen atoms ?
(b) 4 moles of aluminium atoms ?
(c ) 10 moles of sodium sulphate `(Na_(2)SO_(3))` ?
(Atomic masses : `N = 14 u, Al = 27 u , Na = 23 u , S = 32 u` and `O = 16 u`)

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