Question

23. For the reaction shown, calculate how many moles of each
product form when the given amount of each reactant com-
pletely reacts. Assume there is more than enough of the
other reactant.
2PbS(s) + 302(g) → 2PbO(s) + 2S02(8)
(a) 2.4 mol PbS
(b) 2.4 mol O2
(c) 5.3 mol PbS
(d) 5.3 mol O2

Answer 1

Further explanation

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Mol ratio :

Pbs : O₂ : PbO : SO₂ = 2 : 3 : 2 : 2

• (a) 2.4 mol PbS

mol PbO

$\tt \dfrac{2}{2}\times 2.4=2.4$

mol SO₂

$\tt \dfrac{2}{2}\times 2.4=2.4$

• (b) 2.4 mol O₂

mol PbO

$\tt \dfrac{2}{3}\times 2.4=1.6$

mol SO₂

$\tt \dfrac{2}{3}\times 2.4=1.6$

(c) 5.3 mol PbS

mol PbO

$\tt \dfrac{2}{2}\times 5.3=5.3$

mol SO₂

$\tt \dfrac{2}{2}\times 5.3=5.3$

• d) 5.3 mol O₂

mol PbO

$\tt \dfrac{2}{3}\times 5.3=3.53$

mol SO₂

$\tt \dfrac{2}{3}\times 5.3=3.53$