Answer:
See Explanation
Explanation:
8. 3, 1, -1, +1/2 => 3pₓ¹ => Aluminum
9. 4, 2, +1, +1/2 => 4d₁¹ => Chromium
10. 6, 1, 0, -1/2 => 6p₀² => Argon
11. 4, 3, +3, -1/2 => 4f₊₃² => Lutetium
12. 2, 1, +1, -1/2 => 2p₊₁² => Neon
I think you mean:
".. reacts with oxygen gas to produce lead (II) oxide and 'sulfur' dioxide..."
The balanced chemical reaction would be
2PbS + 3O2 --> 2PbO + 2SO2
The stiochiometric ratio is this: 3 moles of O2 produces 2 moles of lead (II) oxide. So,
0.500 moles (2/3) = 0.333 moles
Therefore, 0.333 moles of PbO is produced when 0.500 moles of O2 reacts with PbS.
<u>Answer:</u> The number of moles of 
is 0.05 moles.
<u>Explanation:</u>
To calculate the molarity of solution, we use the equation:
We are given:
Molarity of solution = 0.10 mol/L
Volume of solution = 1 L
Putting values in above equation, we get:
The chemical reaction for the ionization of sodium sulfate follows the equation:
By Stoichiometry of the reaction:
2 moles of sodium ions are produced by 1 mole of sodium sulfate
So, 0.10 moles of sodium ions will be produced by = 
of sodium sulfate.
Hence, the number of moles of is 0.05 moles.
