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When lead (II) nitrate is heated, one of the products is a brown gas. a).Write the equation of the reaction that occurs. b).If #0.290 dm^3# of the brown gas was produced; calculate the mass of the lead (II) nitrate that was heated. (R.F.M lead (II) nitrate =331; Molar gas volume = #24dm^3# ). (KCSE 2011 paper 1 question 7).