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You find a spool of pure copper wire while snooping through your brother's purse. The wire has a diameter of 0.3 millimeter and a length of 200 meters. A) Derive a formula for the resistance of the spool as a function of temperature. B) Estimate the resistance of the spool at 0 C and 100 C. C) if this wire is held at 25 C and stressed to 95% of its yield stress, estimate its resistance.
The mass spectrum of an organic compound shows the relative abundances of M to be 34.83% and M 1 to be 6.027%. Assuming the peaks are caused by 12C and 13C isotopes
The solubility of the ionic compound M2X3, having a molar mass of 205 g/mol, is 3.16 10-7 g/L. Calculate the Ksp of the compound.
Suppose the pH of the water is 4.67 and that the concentration of iron(II) in the water is 5.17x 10-5 M, what is the potential of the corrosion reaction under the above conditions at 298 K?
What values are quoted in handbooks for common hydrates of your cation?
What will be the result of the errors in TLC technique? (a) Too much sample applied (b) Solvent with too high polarity (c) Solvent pond too deep in the developing chamber.
1.a pepsin of 3 grams get dissolved in water and formed a solution of 10.00 ml it was found that the osmotic pressure
500.0 mL of 0.120 M NaOH is added to 575 mL of 0.200 M weak acid (Ka = 3.84 × 10-5). What is the pH of the resulting buffer. HA(aq) + OH^-(aq) ---> H20(l) + A^- (aq) pH=
The equilibrium of Fischer esterification reactions in general is slightly towards product formation. The equilibrium can be made more favorable for product formation by all of the following except
A buffer solution of pH 5.3 is to be prepared from propionic acid and sodium propionate. The concentration of sodium propionate must be 0.50 M. What should the concentration of propionic acid be? Ka = 1.3 X 10-5
what is the change in enthalpy when 18.4 g of steam at 100?c is converted to liquid waterat the same temperature and
Molecular solid can be pictured as the collection of independent harmonic oscillators. (a) Starting with the expression for the partition function derive an expression for the vibrational heat capacity
A sample of air at 15 psi is compressed at constant temperature from 555ml to 275ml. Calculate the resulting pressure.
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