1 mole of PbS is oxidised by "X" moles of O3 to get "Y" moles of O2. X + Y = .
Answer
8
Solution
Ozone oxidises sulphide to sulphate; each O3 gives one O atom: O3 O2 + [O]
PbS needs 4 O atoms to become PbSO4:
PbS(s) + 4O3(g) PbSO4(s) + 4O2(g)
⇒ X = 4, Y = 4
∴ X + Y = 8
Answer: 8