Shown below is a concentration vs.time plot for the reaction A ⇌ 2B.For this reaction the value of the equilibrium constant is 
Definitions:
Security
A financial instrument that represents an ownership position in a publicly-traded corporation (stock), a creditor relationship with a governmental body or a corporation (bond), or rights to ownership as represented by an option.
Gains
Profits realized from the sale of assets or from investment income, including dividends, interest, and capital gains.
Strike Price
The specified price at which the buyer of an option can buy (in the case of a call option) or sell (in the case of a put option) the underlying asset.
Risk-free Rate
The theoretical rate of return of an investment with zero risk of financial loss, typically represented by the yield on government securities.
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