A Researcher Finds That a Compound Is Composed of 43

question 12

Multiple Choice

A researcher finds that a compound is composed of 43.6% phosphorus and 56.4% oxygen.In a separate analysis,she finds that it has a molar mass of 142 g/mol.What is the molecular formula of the compound?

• A)P₄O₁₀
• B)P₃O₇
• C)PO₂
• D)PO
• E)P₂O₅

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Definitions:

Eduard Hitzig

A 19th-century neurologist who made pioneering contributions to the understanding of the brain's electrical activity and function.

Motor Cortex

The region of the cerebral cortex involved in the planning, control, and execution of voluntary movements.

Cerebrum

The largest part of the brain, responsible for various higher functions such as thought, action, and emotion.

Corpus Callosum

The large band of neural fibers connecting the two brain hemispheres and carrying messages between them.