Answer:
Mass = 12.82 g
Explanation:
Given data:
Mass of oxygen = 8.5 g
Mass of H₂S = 10.0 g
Mass of SO₂ = ?
Solution:
Chemical equation;
2H₂S + 3O₂ → 2SO₂ + 2H₂O
Number of moles of H₂S:
Number of moles = mass/ molar mass
Number of moles = 10.0 g / 34 g/mol
Number of moles =0.3 mol
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 8.5 g / 32 g/mol
Number of moles = 0.3 mol
Now we will compare the moles of SO2 with oxygen and hydrogen sulfide.
O₂ : SO₂
3 : 2
0.3 : 2/3×0.3=0.2 mol
H₂S : SO₂
2 : 2
0.3 : 0.3
The number of moles of SO₂ produced by oxygen are less so it will limiting reactant.
Mass of SO₂:
Mass = number of moles × molar mass
Mass = 0.2 mol × 64.1 g/mol
Mass = 12.82 g
