Question

PAGE NO.:
DATE: 1
What is
the mass of:
ů
0.2
mole of
N atom.
ث
3 mole & NH3 molecules​

Answer 1

Explanation:

a) 1 mole of nitrogen atoms=1×mass of N=1×14=14 g

(b) 4 moles of aluminium atoms=4×27=108 g

(c) 10 moles of sodium sulphite(Na2SO3)=10×Mass of Na2SO3.

Mass of Na2SO3=2×Mass of Na atom+1×Mass of S atom+3×Mass of O atom

=2×23+1×32+3×16=46+32+48=126 g/mol

∴10 moles of Na2SO3=

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