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Assume that you wanted to prepare a small volume of purehydrogen by reaction of lithium metal with water. How many grams of lithium would you need to prepare 450 mLof H2 the density of hydrogen is 0.0893 g/L?
Calculate the acid dissociation constant Ka, for the ammonium ion (NH^4+); Kb for NH3 is 1.8 x 10^-5
A sample of solid aluminum with a mass of 1.75 Kg is cooled at constant pressure from 300 to 265 K. Calculate the entropy change. Cp,m = 24.35 J/(K mol).
if a gas occupies 733 mililitres at the temperature of ten degree celsius at what temperature will it occupy nbsp950
a mixture of he ne and ar has a total pressure of 0.80 atm and is found to contain 0.55 mol he 0.94 mol ne and 0.35 mol
Find the temperature at which Kp = 4.00 for the reaction N2O4(g) 2NO2(g). [Given: at 25°C, for NO2(g), ?H°f = 33.85 kJ/mol, S° = 240.46 J/mol·K; for N2O4(g), ?H°f = 9.66 kJ/mol, S° = 304.3 J/mol·K; assume that ?H° and ?S° are independent of temp..
How many grams of formic acid, HCOOH, must be added to 0.300 L of 0.190 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.00? Assume no volume change. Ka of HCOOH = 5.0 10-4.
The balanced equation for trans-1,2-dibenzoylethylene in ethanol to give the product cis-1,2-dibenzoylethylene
A 0.150 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 135.0 g/mol. (a)What is specific rotation of D
what can you say about the realtive magnitudes of the latice energy of lithium iodide and its heat of
describe the change in conductivity as the concentration of the NaCl solution was increased by the addition of NaCl drops
at 1000 k a sample of pure no2 gas decomposes.2 no2g 2 nog o2gthe equilibrium constant kp is 158. analysis shows that
Calculate the de Broglie wavelength of a Helium atom moving at a speed of 244.0 m/s.
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