Answer to Question #137157 in General Chemistry for Javier

Question

How many moles of S are in each of the following quantities?

120 g SO2

Answer 1

Molar mass of SO₂ =( atomic mass of Sulphur + 2 X atomic mass of oxygen)

=( 32 + 2 x 16) g/mol

= 64 g/mol

120 grams of SO₂ = ( 120 g /64 g.mol )

= (120/64) mol SO₂

1 mole of SO₂ contain 1 mole of 'S'

(120/64) mole of SO₂ contain = (120/64) mole 'S'

= 1.875 mole 'S'

Hence, 1.875 mole 'S' present in 120 grams of SO₂.