MATS 201B MT sollutions.pdf - MATS 201B / MAE 271B / ECE...

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MATS 201B / MAE 271B / ECE 238BWinter 2017Midterm ExamClosed book, open notesEach question worth 25 points1.The decomposition of ammonia on Pt is given as2NH3N2+3H2The rate is first order in [NH3] and inversely proportional to [H2]. Write thedifferential rate equation for the rate of formation of H2, d[H2]/dt in terms ofthe initial concentration of NH3([NH3]o) and [H2].NH312N2+32H2d NH3dt=kNH3H2NH3=NH3oξH2=32ξd NH3dt=dξdt=kNH3oξ32ξd H2dt=32dξdt=32kNH3oξ32ξd H2dt=32kNH3o23H2H2=k32NH3oH2H22.Isotopes of A, B and C are part of a radioactive decay sequence.ABCThe half-life of A (relative to the decay to B) is one year. The half-life of B(relative to the decay to C) is one hour.(a)What fraction of the original A is left after one month?
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2d Adt=k AA

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Term
Winter
Professor
JOANNAMCKITTRICK
Tags
Radioactive Decay, Chemical reaction

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