In the Process of Obtaining Lead from PbS, or Galena $\rightarrow$

question 24

Multiple Choice

In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen) , so that the following reaction occurs: 2PbS(s) + 3O₂(g) $\rightarrow$ 2PbO(s) + 2SO₂(g) If 50.0 g of PbS are mixed with 25.0 g of oxygen, how many grams of PbO should form?

• A)116 g
• B)46.6 g
• C)163 g
• D)69.9 g
• E)93.2 g

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Definitions:

Levels-of-processing Model

A cognitive psychology theory that suggests memory retention of information is influenced by the depth of processing, with deeper levels of analysis producing more durable memory.

Deeper Level

Indicates an analysis or understanding that goes beyond the surface to understand underlying meanings or principles.

Shallower Level

A term that could refer to understanding or processing something at a more superficial or less complex level.

Maintenance Rehearsal

A cognitive strategy that involves repetitively reviewing information to retain it in short-term memory.