Question

What is the mass of
(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomie mass of aluminium
- 27)?
(c) 10 moles of sodium sulphide (Na, SO,)?​

Answer 1

Answer:

a- Nom=given mass/molecular mass

1. = gm/23(molecular mass of nitrogen)

gm=23×1

=23g

therefore 1mole of nitrogen has 23 g of mass

I don't know the molecular mass of aluminium

so you find and do as I done for a

Answer 2

Answer:

(a) 1mole of nitrogen contains 14 gm

(b) 4 moles of Al contain 108 gm

(c) 2×23+32=78 g

Explanation:

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