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Indicate whether each process produces an increase or decrease of the entropy of the system? boiling of ethanol dissolving sodium chloride in water 2H2O (g) ? 2H2 (g) + O2 (g) BaF2 (s) ? Ba2+ (aq) + 2F- (aq) Na (s) + 1/2Cl2 (g) ? NaCl (s) CaO (s) + CO2 (g) ? CaCO3 (s)
Which substance is removed from the dichloromethane and transferred to the aqueous 1 M sodium hydroxide
A volume of 32.2 mL of a 1.16 M KMnO4 solution is mixed with 17.7 mL of .692 M KMnO4 Solution. Caclulate the concentration of the final solution.
Lethality of Carbon Monoxide, Sulfur Dioxide and TNT, Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning
Determine the total number of valence electrons in each of the following: a) SBr2; b)NBr3; c) CH3OH; d) NH4^+.
what concentration of aqueous nacl solution freezes at -15.2 c? the freezing point of pure water is 0.0 c and kf of
The heat capacity of the calorimeter was 24.5J/0C and contained exactly 1250g water which increased from 24.620C to 27.430C. Calculate (Delta)U for the reaction in kJ/mol rxn
How many grams of sodium lactate (NaC3H5O3 ) should be added to 1.46 L of 0.150 M lactic acid (HC3H5 O3, Ka = 1.4 x 10-4) to form a buffer solution with pH = 4.12
the specific heat of an unknown metal is found to be 0.233 j kg. the law of dulong and petit predicts a molar heat
the following wavefunction is proposed for an excited state of the lithiumatom psi 1radic61s1beta1 2s1beta1
a 255-mL sample of a HCl solution reacts with excess Ca to produce 14.0 L of H2 gas at STP. what is the molarity (M) of the HCl solution? Ca(s) + 2HCl(aq) > CaCl2(aq) + H2(g)
Determine the following parameters of this circuit: How many watts would be produced from this circuit if the 6.00 V battery were replaced with a 586 V battery?
Chemistry The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm. The reaction occurs in a 1.09-cm sample cell
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