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Explain the relationship between the signof delta H rxn and wheathera reaction is exothermic or endothermic
The presence of carcon- carbon double bonds in eugenol can be tested using the bromine water test. write a balance equation for the reaction involved in this test.
What is the hydronium ion concentration of a solution with an hydroxyl ion concentration of 1.8 x 10^-10 M? D) What is the hydronium ion concentration of a solution with an hydronium ion concentration of 5.13 x 10 ^-9 M?
If a 0.10M solution of HA has a pH of 5.83 at 25 degrees C, what is deltaG0 for the acid's dissociation at 25 degrees C
Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
The following data were obtained for the decomposition of N2O5 in the presence of 1 atm. N2 at 298 K.time (hr.) P(N2O5) atm P(N2O5) P(N2O5) P(N2O5) (for P(N2)=5 P(N2O5) (atm))
When 2.42g of a nonelectrolyte solute is dissolved in 855 mL of water at 21 degree C, the resulting solution exerts an osmotic pressure of 829 torr. What is the molar concentration (M) of the solution
What is the atomic mass of unknown element X if it has the following isotopic composition.
Calculate the value of E°cell for a voltaic cell described in each of the following. Enter your answer with 3 significant digits. Enter scientific notation as 1.23E4. (a) Br2(l) is reduced to Br
A mole of hydrogen atoms contains 6.02 x 1023 atoms and occupies 22.4 L. How many hydrogen atoms are contained in 25.00 mL of this gas?
A sample of helium gas occupies a volume of 38L at 780 torr and 25ºC. What volume would the gas occupy at standard temperature and pressure
Calculate weight percent of Fe in ore with .4919g of sample with 11ml of .25M Sn2Cl (56.5010g) and 10mL of .25M Hg2Cl (67.8644g) as analyte titrating 1.0058g of potassium dichromate diluting with water
Titrations: Finding Concentration, A 35.00 mL solution containing an unknown concentration of pyruvic acid required 25.13 mL of 0.2011 M NaOH to reach the end point.
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