Galena (an ore) is partially oxidized by passing air through it at high temperature. After some time, the passage of air is stopped, but the heating is continued in a closed furnace such that the cont

Question

Galena (an ore) is partially oxidized by passing air through it at high temperature. After some time, the passage of air is stopped, but the heating is continued in a closed furnace such that the contents undergo self-reduction. The weight (in $kg$ ) of $Pb$ produced per $kg$ of $O_{2}$ consumed is ____. (Atomic weights in $g {mol}^{- 1} : O = 16, S = 32, Pb = 207$ )

Question diagram: Galena (an ore) is partially oxidized by passing air through

Answer:

6.47

Solution:

$mol of Pb = mol of O_{2}$
$= \frac{1000}{32} m o l$

$mass = moles \times molecular mass$
$∴$ Mass of $Pb = \frac{1000}{32} \times 207 g$
$= \frac{207}{32} kg = 6.47 kg$

TestHub · Accepted Answer

mol of Pb = mol of O 2 = 1000 32 m o l mass = moles × molecular mass ∴ Mass of Pb = 1000 32 × 207 g = 207 32 kg = 6 . 47 kg

Chemistry - Metallurgy Question with Solution | TestHub

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