A first order reaction has the rate constant of 1.15 10⁻³ ~s ⁻¹ . The time required to reduce 10 ~g of reactant to 6 ~g is 10^2 sec . What is the approximate value of x ? ( 5=0.7, 3=0.48)

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Correct answer: C. 4.4

Order =1, k =1.15 10⁻³ ~S ⁻¹, C ₁=10, C ₂=6 aligned & t = 2.303 k C ₁ C ₂ = 2.303 1.15 10⁻³ 10 6 & =444.27 4.4 10^2 & Thus, x=4.4 & aligned

A first order reaction has the rate constant of 1.15 10⁻³ ~s ⁻¹ . The time required to reduce 10 ~g of reactant to 6 ~g is 10^2 sec . What is the approximate value of x ? ( 5=0.7, 3=0.48)

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