Answer:
The container that has 0.20 moles of the compound has more moles compared to the container that has 0.15 moles of compound A
Explanation:
The molarity is defined as the concentration of a substance in solution, expressed as the number of moles of a solute per liter of solution.
From the given information.
In compound A
Molarity of the solution = 0.15 molar = 0.15 m/L
It implies that, In compound A, there are 0.15 moles present in 1 L of the solution.
Similarly;
In compound B
Molarity of the solution = 0.20 molar = 0.20 m/L
It implies that, In compound B, there are 0.120 moles present in 1 L of the solution.
Thus, we can conclude that:
The container that has 0.20 moles of the compound has more moles compared to the container that has 0.15 moles of compound A
Easy!
All you have to do is look at the formula.
Lead Sulfide is PbS
Lead Oxide is PbO
Sulfur Dioxide is SO₂
Oxygen is O₂
You would need to balance out the equation, so it would be PbS + O₂ --> PbO + SO₂.
We can balance this out with the following. 2PbS + 2O₂ --> 2PbO + SO₂.
So 0.500 moles of oxygen would be the same conversion rate for PbO so it would also be 0.500 moles of lead oxide (PbO)