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The combustion of oxalic acid in a bomb calorimeter yields 2816 J/g at 25 degrees Celsius. Calculate (a) ΔcU and (b) ΔcH for the combustion of 1 mole of oxalic acid (M = 90.0 g/mol)
the reaction 2nog cl2g ltgt 2nocl g is allowed to reach equilibrium in a 1.00 l vessel at 500.0 k. at equilibrium the
a chemistdissolves0.099g of cuso4 middot 5 h2o in water and dilutes the solution to the mark in a 500-ml volumetric
A rock that contains 3.0 10-15 mol of 232Th (t1/2 = 1.4 multiplied by 1010 yr) has 7.7 104 fission tracks, each track representing the fission of one atom of 232Th. How old is the rock
A sample of an unknowk gas effuses in 11.6 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unkown gas
Calculate the pH at the equivalence point in titrating 0.010 M solutions of each of the following with 0.081 M NaOH. (b) hypochlorous acid (HClO), Ka = 3e-08 pH = _?_ It's not 8.3
nitrogen gas was collected over water at a temperature of 40 degrees C, and the pressure of the sample was measured at .796 mmHg. if the vapor pressure of water at 40 degrees C is 55 mmHg, what is the partial pressure of the nitrogen gas?
what is being asked? using the values of the effective molar absorptivities you determined from your slopes and the
What are some possible sources of error in your calculated atomic weight for Mg? A. Calculate the % Absolute error. B. Calculate the % relative error in the mass, volume, temperature, and other measurements.
an antacid tablet containing magnesium hydroxide as an active ingredient requires 22.6 ml of 0.597 m hcl for complete
a solution containing 16.9 of a nonvolatile molecular compound in 250 g water has a freezing point of -0.744...what is
Discuss the common-ion effect by comparing the solubility of CaCO3 in 3.0 x 10^2 mL of water and in the presence of 0.015 mol of Ca(NO3)2.
what molecular ion peak would you expect for compounds having each of the following molecular formulas?a. c3h7fb.
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