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A 64-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 823 N. What is the acceleration of the elevator?
UV Spectrum of caffeine: Calculate the molar extinction coefficient (e) for caffeine. Show all your work. Note: Assume the diameter to be the cell holder to be 1 cm.
the decomposition of a compound in carbon tetrachloride has a rate constant of 7.49 x 10-3 m-1 min-1. if we start with
In which solution (acidic, basic, neutral water, or doesn't matter) is potassium bromide most soluble
Given Data; P4+6Cl2=4PCl3 change temp= -2439 kj ,4PCl5=P4+10Cl2 change temp= 3438 kj calculate change in temp for the reaction PCl5=PCl3+Cl2.
Determine the oxidation number of all the elements in the balanced redox reaction shown below? 5N^O2^- + 6H^+ + 2Mn^O4^- ---> 5N^O3-^ + 2Mn^+2 + 3H^2O^
Given an unknown sample of a solid, how would you decide that it is necessary to do a recrystallization. recystaillization-Why must you use a minimal amount of hot solvent
Given the reaction 4Al(s) + 3O2(g) --> 2Al2O3(s), what is the minimum number of moles of oxygen gas required to produce 1.00 mole of aluminum oxide?
The Balmer series of transitions for the hydrogen atom result in absorption of photons that all originate from the n = 2 level. What are the longest and shortest wavelength photons in the Balmer sequence?
The Lyman series of emission lines of the hydrogen atoms are those for which nf = 1. a) determine the region of the electromagnetic spectrum in which the lines of the Lyman series are observed. b) Calculate the wavelengths of the first three lines..
Lead is below tin but above copper. Suppose that you wanted to remove lead ions from a solutiion to make it less poisonous. Would you ass a strip of tin or copper to the solution
Acetylene gas (C2H2) is produced as a result of the following reaction. CaC2(s)+2H2O(l) = C2H2(g)+Ca(OH)2(aq) . If 32.0 g of CaC2 are consumed in this reaction, how many moles of H2O are needed?
titanium dioxide tio2 is prepared by reaction of ticl4 with o2 at high temperature.ticl4o2 --gt tio22cl2how many
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