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17.5 kj of heat is required to melt 52.5g of ice at its melting point. How much heat is required to raise the temperature of 52.5g of water from its melting point to its boiling point? express answer in kj.
Why does absorbance vs concentration calibration curve need not pass through origin (0,0) looking at beer lambert law?
If the endpoint is surpassed in the back-titration with NaOH, will the reported amount of antacid in the sample be too high or too low?
Estimate the average concentration of methylene chloride. Look up the TL V or the 1WA for methylene chloride and consider how the: evaporation might be performed.
The mass spectrum of an organic compound shows the relative abundances of M to be 67.98% and M 1 to be 15.44%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound.
You are given an unknown, colorless, solution that may contain only one salt from the following set: NaA, NaB, NaC. In solution each salt dissociates completely into the Na+ ion and the anion A-, B-, or C-. The Na+ ion is a spectator ion. Given th..
the solubility of a salt in water represents the amount of solute necessary to reach a state of equilibrium between saturated solution and undissolved
Calculate the enthalpy change in kilojoules when some KOH is added to 47.727 g of water and the temperature increases
copper solid metal and copper sulfate, and of course a salt bridge filled with KCl. What voltage would you expect from this cell at room temperature and 1M ZnSO4 solution but 0.01M CuSO4 solution
You mix 50 ml of a weak monoprotic acid with 50 ml of NaOH solution in a coffee cup calorimeter. Both solutions and the calorimeter were initially at 22 C.
Cyclopropane has significantly less angle strain than cyclopropane, yet is only slightly lower in energy. How can this be true? How does this information relate to the fact that cyclobutane is not a planar molecule
carried through the analysis, the error in determining the analyte is +6.3%. (a) Determine the appartent recovery for the analyte if R1=0. (b) deter,ome the apparent recovery for the interferent if Ra=1.
What is the de Broglie wavelength in cm, of a 12.7 g hummingbird flying at 1.15 multiplied by 102 mph? (1 mile = 1.61 km.)
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