Lead (II) nitrate is a poisonous substance which has been used in the manufacture of special explosives and as a sensitizer in photography. Calculate the mass of lead in 139 g of Pb(NO₃)₂. A)107 g B)90.8 g C)87.0 g D)83.4 g E)62.6 g

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Quizplus · Accepted Answer

The molar mass of Pb(NO3)2 is 331.2 g/mol (Pb = 207.2, N = 14.0, O = 16.0). The mass of lead (Pb) in one mole of Pb(NO3)2 is 207.2 g. Therefore, the mass of lead in 139 g of Pb(NO3)2 is (207.2/331.2) * 139 = 87.0 g.

Lead (II) Nitrate Is a Poisonous Substance Which Has Been