Hello guyss....here is what I need ur kind help again on : [c(ii)]
The main ore of lead is galena, lead(II) sulphide.
To produce lead, this ore is heated in air, when some of the lead(II) sulphide is converted to lead(II) oxide and sulphur dioxide.
The air supply is then cut off and on further heating the lead(II) oxide is converted, by reaction with the remaining lead(II) sulphide, to lead and sulphur dioxide.
Write an equation for (i) the conversion of galena to lead(II) oxide and (ii) the reaction of lead(II) oxide with lead(II) sulphide.
Answers:
(i) 2PbS + 3O2 ----> 2PbO + 2SO2
(ii) 2PbO + PbS ----> 3Pb + SO2
Qb) Calculate the total volume (m3) of sulphur dioxide which would be produced from 5.0 x 10^3 kg of galena in the reactions described in (a). (Assume that one mole of any gas occupies 2.4 x 10^-2 m3 at room temperature and pressure.) (3 marks.)
Answer: 1.004 m^3 ( not sure if its correct ; i did not convert the m^3 to cm^3, as the mass given is in kg...so i think its fine if we don't change the units..)
Qc)i) Another compound of lead, Z, which is found naturally contains 77.5% of lead and 4.5% of crbon by mass. The remainder being assumed to be oxygen. Calculate the empirical formula of the compound.
Answer: PbCO3 (not sure if its right.)
ii) 0.0500 mol of this compound Z gives, on heating, 11.2g of lead(II) oxide and a gas is evolved. What is the molecular formula of the compound Z?
idk how to solve this...
there are some more parts to this Q. i'll post la8er.
Thanks in advance..