The Reaction a → B + C Is Known to Be

question 45

Multiple Choice

The reaction A → B + C is known to be zero order in A with a rate constant of 4.8 × 10^-2 mol/L • s at 25° C. An experiment was run at 25°C where [A]₀ = 2.0M. What is the concentration of B after 4.0s?

• A) 1.8M
• B) 5.5× 10^-1 M
• C) 2.0M
• D) 1.9× 10^-1 M
• E) 1.1× 10^-1 M

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Definitions:

FAS

Fetal Alcohol Syndrome, a condition in a child that results from alcohol exposure during the mother's pregnancy, causing brain damage and growth problems.

Human Chorionic Gonadotropin

A hormone produced by the placenta after implantation, often measured as a marker in pregnancy tests.

Test

An examination or procedure done to detect or measure something, often used to diagnose diseases or conditions.

Placenta

An organ located between the mother and the fetus. It permits the absorption of nutrients and oxygen. In some cases, harmful substances such as viruses are absorbed through the placenta.