CHEM 123 Unit 4 Test Blueprint Key

# How long will it take to plate 00100 moles of zinc

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63) How long will it take to plate 0.0100 moles of zinc from a solution of zinc chloride (ZnCl 2 ) at a current of 0.500 A?
Understand the basic differences between the particles released indifferent types of nuclear decay. Balance a decay reaction 64) The following are three radioactive particles: 𝐻𝑒 2 4 , 𝑒 −1 0 , 𝑒 1 0 a) Write the balanced equation for the beta decay of 𝑇? 43 99 . (2 points) 𝑇? 43 99 𝑒 −1 0 + 𝑅𝑢 44 99 b) Write the balanced equation for the alpha decay of 𝑃𝑜 84 215 . (2 points) 𝑃𝑜 84 215 → 𝐻𝑒 2 4 + 𝑃? 82 211
Given Information Avogadro’s number: 6.022 x 10 23 atoms, ions, molecules or unit cells/mole Conversion value to change C degrees to K degrees: 273.15 K 760 mm Hg = 760 torr = 1 standard atm R = 8.314 ? ?𝑜?∗? or 0.08206 ?∗𝑎𝑡? ?𝑜?∗ ? F(Faraday’s Constant) = 96,485 C/mole e - k (Boltzmann Constant) = 1.38*10 -23 J/K S= k lnW S univ = ∆S system + ∆S surroundings S surroundings = (- ∆H system )/T ∆G = ∆H - T∆S cell = E° red, cathode - E° red, anode K nF RT E Q nF RT E E Q RT G G nFE G K RT G o o o o ln ln ln ln
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• Spring '12
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