A Quantity of Liquid Methanol, CH₃OH, Is Introduced into a Rigid

question 40

Multiple Choice

A quantity of liquid methanol, CH₃OH, is introduced into a rigid 3.00-L vessel, the vessel is sealed, and the temperature is raised to 500K. At this temperature, the methanol vaporizes and decomposes according to the reaction CH₃OH(g) CO(g) + 2 H₂(g) , K_c= 6.90 * 10^-2.
If the concentration of H₂ in the equilibrium mixture is 0.426M, what mass of methanol was initially introduced into the vessel?

• A)147 g
• B)74.3 g
• C)33.9 g
• D)49.0 g
• E)24.8 g

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Definitions:

Juvenile Characteristics

Traits or features displayed by young individuals of a species that are typically lost or altered upon reaching adulthood.

Biological Species Concept

A definition of species whereby individuals are considered to belong to the same species if they are capable of interbreeding and producing fertile offspring.

Bacteria

Microscopic, single-celled organisms that can be found in a variety of environments; some are beneficial while others can cause diseases in humans, animals, and plants.

Background Extinction

The continuous, low-level extinction of species that has occurred throughout much of the history of life. Compare with mass extinction.