m= 0.15(8.6-s) The amount in moles, , of a reactant seconds after the start of a chemical reaction is given by the equation. Which of the following is the best interpretation of the number? (Choice A) The initial amount of reactant was moles. A The initial amount of reactant was moles. (Choice B) The amount of reactant decreases by moles per second. B The amount of reactant decreases by moles per second. (Choice C) No reactant remains seconds after the start of the chemical reaction. C No reactant remains seconds after the start of the chemical reaction. (Choice D) The amount of reactant begins to decrease seconds after the start of the chemical reaction. D The amount of reactant begins to decrease seconds after the start of the chemical reaction.

Question

m= 0.15(8.6-s)  The amount in moles,    , of a reactant     seconds after the start of a chemical reaction is given by the equation. Which of the following is the best interpretation of the number?  (Choice A)   The initial amount of reactant was     moles. A The initial amount of reactant was     moles. (Choice B)   The amount of reactant decreases by     moles per second. B The amount of reactant decreases by     moles per second. (Choice C)   No reactant remains     seconds after the start of the chemical reaction. C No reactant remains     seconds after the start of the chemical reaction. (Choice D)   The amount of reactant begins to decrease     seconds after the start of the chemical reaction. D The amount of reactant begins to decrease     seconds after the start of the chemical reaction.

Bytelearn · Accepted Answer

Analyze Equation: Let's analyze the given equation m = 0.15(8.6 - s) to understand what each term represents. - m is the amount in moles of a reactant. - s is the time in seconds after the start of the chemical reaction. - 0.15 is a constant multiplier. - 8.6 is a constant term that is being subtracted by the variable s.Interpret Equation: The term 0.15(8.6 - s) suggests that as time (s) increases, the amount in moles (m) decreases. This is because s is subtracted from 8.6, and the result is multiplied by 0.15.Evaluate Choices: The constant 0.15 is the rate at which the amount of reactant decreases per second. This is because it multiplies the difference between a constant value (8.6) and the time variable (s), indicating a decrease over time.Now let's interpret the choices given: - (Choice A) The initial amount of reactant was 0.15 moles. This is incorrect because if s = 0, then m = 0.15 * 8.6, not 0.15. - (Choice B) The amount of reactant decreases by 0.15 moles per second. This is the correct interpretation because 0.15 is the rate of decrease. - (Choice C) No reactant remains 0.15 seconds after the start of the chemical reaction. This is incorrect because if s = 0.15, the equation does not result in m = 0. - (Choice D) The amount of reactant begins to decrease 0.15 seconds after the start of the chemical reaction. This is incorrect because the equation shows a continuous decrease from the start, not beginning after 0.15 seconds.

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