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Consider a powder with 99.5% AuCl3 particles and 0.5% AgCl particles, and each weighs 10 µg. a. If one weighed out 40 mg of the mixture, how much AgCl will be weighted out, and what is the standard deviation (answer to 2 significant figures)? b. Assuming that the probability distribution is Gaussian, what is the probability (in %) that you will weigh out >47% more AgCl than the expected average amount?
An analysis of fatty acids is desired. These fatty acids have boiling points in excess of 275O C. The sample is extracted with methanol to obtain a solution that only contains the fatty acids.
Which of the reactions below are redox reactions. a- 2Na+Cl2--->2NaCl b- Fe+NiSO4---->Ni+ FeSO4 c- AgNO3+NaCl---> AgCl2+NaNO3
calculate the equilibrium constant from an absorbance value but my professor never told us how to calculate this.
What is the BOD concentration just downstream of the discharge point? (b) If the stream has a cross-sectional area of 10 m2, "what is the BOD concentration 50 km downstream? (BOD is removed with a first-order decay rate con- stant equal to 0.20/da..
Bohr's model is used to treat emission lines of hydrogen lamp. It may also be used to study emission lines in mercury lamp or krypton lamp, the other two lamps that are used in this lab.
Which of the following factors does not affect the velocity of an enzyme catalyzed reaction
what is the q solution in Jouls and what is the q rxn in Joules? What is the Delta H rxn in KJ/mo of HNO3 neutralized?
Calculate the molar concentration of HCl if 25.00ml the solution of HCl react quantitatively with NaOH 19.58ml a 0.1062M solution. Write the balanced equation.
A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 884mm Hg
Qualitatively, describe how an acid-base indicator works. Why do we want to use a minimum amount of indicator in a titration? Select all that apply.
ethanol c2h5oh melts at -114degc. the enthalpy of fusion is 5.02 kjmol. the specific heats of solid and liquid ethanol
he most probable mechanism of reactivity for solvolysis of benzyl chloride is a) Sn1 b) Sn2 c) E1 d) E2. The most probable mechansim of reactvity for solvolysis of 2-chloro-norborane
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