For the Second-Order Reaction Below,the Initial Concentration of a Is $2 \mathrm{~A} \rightarrow \mathrm{B} \quad\quad\quad\quad\quad \text { rate }=k[\mathrm{~A}]^{2}$

question 11

Multiple Choice

For the second-order reaction below,the initial concentration of A is 1.00 M.If the concentration of A is reduced to 0.43 M after 75 seconds,what is the rate constant? $2 \mathrm{~A} \rightarrow \mathrm{B} \quad\quad\quad\quad\quad \text { rate }=k[\mathrm{~A}]^{2}$

• A) 5.2 × 10?⁴ L/mol?s
• B) 5.7 × 10?³ L/mol?s
• C) 7.6 × 10?³ L/mol?s
• D) 1.1 × 10?² L/mol?s
• E) 1.8 × 10?² L/mol?s

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Definitions:

Adrenal Medulla

A portion of the adrenal gland responsible for producing adrenaline and noradrenaline, which are vital for the body's fight or flight response.

Adenohypophysis

Portion of the hypophysis derived from the oral ectoderm; also called anterior pituitary.

Parathyroid Glands

The parathyroid glands are small endocrine glands in the neck that produce parathyroid hormone, which regulates calcium levels in the blood.

Somitomeres

Early segmented structures in embryonic development that give rise to somites, precursors to skeletal muscle, vertebrae, and dermis.