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A 23.5 mL volume of a 0.01140 M KMnO4 solution was used to reach the equivalence point in the titration of 0.1055 g of an unknown sample containing the oxalate ion. Determine the mass (in grams) of C2O4 2 - that would be present in a 100 g sample.
A solution of vinegar has a 0.81M the manufacturer claims that the vinegar has 5% acetic acid by weight. the denisty is 1g/ml is the manufacturer correct
Calculate the temperature of the system once equilibrium has been reached. Assume that Cp,m for Au and H2O is constant at its value for 298K throughout the temperature range of interest.
A typical aspirin tablet contains 324 mg of aspirin (acetylsalicylic acid, C9H8O4), a monoprotic acid having Ka=3.0×10?4. If you dissolve 4 aspirin tablets in a 340mL glass of water, what is the pH of the solution and the percent dissociation?
Calculate the E°cell values for the galvanic cell in Q1. IO3- (aq) + Fe2+ (aq) D Fe3+ (aq) + I2 (aq) 4. Calculate DG° at 25 °C for the reaction
What is the hydroxide ion concentration of an aqueous 0.00364M caffeine solution. The most basic nitrogen atom in caffeine has aKb of 4.1x10-4.
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 16.0 L
what is the wavelength of the line in the Balmer series of hydrogen corresponding to the transition for n=5 to n=2? the constant for Balmer's equation is 3.2881*10^15 s-1
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
Calcium oxide is sometimes very challenging to store in the chemistry laboratory. This compound reacts with moisture in the air and is converted to calcium hydroxide.
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
If the wavelength ( ) of a light wave is 5.0 x 10^-6 meter, calculate its frequency (V). Use c = ?V width c = 3.0 x 10^8 m/sec. What are the units of V
Calculate the ratio of HCL molecules in the first excited rotational state to those in the ground state @ 25 C. Assume an equilibrium bond distance of 1.275 angstroms.
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