ID ezto.mheducation com Dashboard HWK Chapter 13 Chegg l Guided Solutions and St
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Question
ID ezto.mheducation com Dashboard HWK Chapter 13 Chegg l Guided Solutions and Study Help |C Question 7 (of 19) Save & Exit Submit 7. 5.26 points Enter your answer in the provided box. Report problem The reaction 2A B is first order in A with a rate constant of 2.8 × 10-2 s-1 at 80°C. How long (in seconds) will it take for A to decrease from 0.700 M to 0.140 Would you like to try another version of this question? By doing so, you l start from scratch and lose all points associated with this question Try another References eBook & Resources Multipart Answer Difficulty: 3 Difficulty: MediumExplanation / Answer
For first order
dC/dt = k*C^1
dC/dt = k*C
When developed:
dC/C = k*dt
ln(C) = ln(C0) - kt
substitute
ln(0.14) = ln(0.7) - (2.8*10^-2) * t
t = -(ln(0.14) - ln(0.7)) /((2.8*10^-2)) = 57.47s