Many important metals occur as sulfide, arsenide, and antimonide minerals, especially in the Sudbury mineral complex. The first step in processing these ores involves “roasting" the ore in air to produce the metal or metal oxide, along with nonmetal oxides that can be serious pollutants if not trapped. Suppose that you roast 3.00 kg of the mineral shandite, Ni3Pb,S2. The balanced equation for the reaction 1. is: 2 NişPb2S2 + 9 O2 → 6 NiO + 4 PbO + 4 SO2 (a) How many kg of NiO can be produced? (b) How many kg of the pollutant PbO can be produced? (c) How many liters of air at 25°C are required for roasting? Assume that air contains 23% Oz by mass, and that the density of air at 25°C is 1.2 g/L. Molar masses: NizPb2S2 654.6 g/mol NiO 74.69 g/mol PbO 223.20 g/mol

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1.
Many important metals occur as sulfide, arsenide, and antimonide minerals, especially in the Sudbury
mineral complex. The first step in processing these ores involves "roasting" the ore in air to produce the metal
or metal oxide, along with nonmetal oxides that can be serious pollutants if not trapped.
Suppose that you roast 3.00 kg of the mineral shandite, Ni3Pb,S2. The balanced equation for the reaction
is:
2 Ni3Pb2S2 + 9 02 → 6 NiO +4 PbO + 4 SO2
(a) How many kg of NiO can be produced?
(b) How many kg of the pollutant PbO can be produced?
(c) How many liters of air at 25°C are required for roasting? Assume that air contains 23% O2 by mass,
and that the density of air at 25°C is 1.2 g/L.
Molar masses:
NizPb2S2 654.6 g/mol
NiO 74.69 g/mol
PbO 223.20 g/mol
Transcribed Image Text:1. Many important metals occur as sulfide, arsenide, and antimonide minerals, especially in the Sudbury mineral complex. The first step in processing these ores involves "roasting" the ore in air to produce the metal or metal oxide, along with nonmetal oxides that can be serious pollutants if not trapped. Suppose that you roast 3.00 kg of the mineral shandite, Ni3Pb,S2. The balanced equation for the reaction is: 2 Ni3Pb2S2 + 9 02 → 6 NiO +4 PbO + 4 SO2 (a) How many kg of NiO can be produced? (b) How many kg of the pollutant PbO can be produced? (c) How many liters of air at 25°C are required for roasting? Assume that air contains 23% O2 by mass, and that the density of air at 25°C is 1.2 g/L. Molar masses: NizPb2S2 654.6 g/mol NiO 74.69 g/mol PbO 223.20 g/mol
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