An Iron Ore, Magnetite, Contains Only Iron and Oxygen

question 11

Multiple Choice

An iron ore, magnetite, contains only iron and oxygen. In refining 100.0 g of the ore, 72.35 g of iron are obtained. What is the empirical formula of the ore?

• A)Fe₂O₃
• B)FeO₂
• C)Fe₂O₅
• D)Fe₃O₄
• E)FeO

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Definitions:

Hemispheres

Refer to the two halves of the brain, each responsible for different functions and processes.

Nonprimary Motor Area

Regions of the brain involved in the planning, control, and execution of voluntary movements, distinct from the primary motor cortex.

Coordinating Movements

The process of using different parts of the body together smoothly and efficiently.

Right Hemisphere

Half of the brain that is typically associated with spatial abilities, creativity, and visual tasks.