Question

Q10/310 P32 Q8
Nitrogen dioxide is a brown gas. It can be made by heating certain metal
nitrates
2Pb(NO3)2 -- 2PbO + 4NO. + O2
(c) A 5.00 g sample of impure lead(lt) nitrate was heated. The volume of
oxygen formed was 0.16dm' measured at itp. The impurities did not
decompose
Apokbre 23or 2182)
Calculate the percentage of lead(II) nitrate in the sample
be
2Pb(NO3)2 - 2PbO + 4NO2 + O2
64 4
mas
molar moss
Number of moles of Oz formed
16
Number of moles of Pb(NO3)2 in the sample =
Mass of one mole of Pb(NO3)3 = 331 g
Mass of lead(lt) nitrate in the sample
eadem
g
Percentage of lead(I) nitrate in sample =

Answer 1

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