What is the mass of 1 mole of nitrogen

Asked by admin @ 20/08/2021 in Chemistry viewed by 291 People

What is the mass of (a) 1 mole of nitrogen atom? (b) 4 moles of aluminium atom? (c) 10 moles of sodium sulphite (Na₂SO₃) ?

Answered by admin @ 20/08/2021

(a) Mass of nitrogen atom = number of moles x atomic mass

= 1 x 14 = 14 g
(b) Mass of aluminium atom = 4 x atomic mass = 4 x 27 = 108 g
(c) Mass of Na2SO3 = 2 x 23 + 32 + 16 x 3 = 46 + 32 + 48 = 126 g
1 mole of Na2SO3 = 126 g
Therefore, 10 moles of Na2SO3 = (10 x 126) g = 1260 g

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