Question

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

Answer 1

(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

Answer 2

$<b>$ ☺ Hello mate__ ❤

◾◾here is your answer...

Approach to solving Question;- 1st we find mass of 1 mole ( it is standard value) . Than multiply this by given no. Of moles.

(a) The mass of 1 mole of nitrogen atoms is 14g.

(b) The mass of 4 moles of Al

=4 × 27 g

= 108g

(c) The mass of 10 moles of Na2SO3

=10 × [2 × 23 + 32 + 3 × 16]g

= 10 × 126g

= 1260g

I hope, this will help you.

Thank you______❤

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