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Question- A sample of O2 gas is stored at 30.0 C and 75torr. If the volume was 125mL how much did the oxygen weigh?
Give reasons or calculations to sustain your answer.
What happens to carboxylic acid when it reacts with 1M NaOH and show the reaction. How does this change its solubility. Which compounds are now in each solution
A Fraunhofer diffraction pattern is produced from a light sourced of wavelength 580 nm. The light goes through a single slit and onto a screen 1.0 m away. The first dark fringe is 5.0 mm from the central bright fringe. What is the slit width
What is the hydronium-ion concentration of a 4.07 10-4 M solution of p-bromobenzoic acid, BrC6H4COOH, for which Ka = 1.00 10-4?
At 200 K, the rate constant for the reaction of NO with ozone to give NO2 and O2 was found to be 1.3 x 106 L/mol•s. At 300 K, the rate constant increased to 9.9 x 106. Calculate the activation energy for the reaction in kJ/mol
Use an enthalpy diagram to calculate the lattice energy of CaCl2 from the following information. Energy needed to vaporize one mole of Ca(s) is 192 kJ.
freezing point of nbsppure 2-methyl-2propanol is 25.5 degree celsius however it absorbs h2o when it on exposed to humid
Devise tests which allow you to distinguish between the ions in each case.
Assume that the trial wave function = (1-ar)-2 is chosen to explain the hydrogen atom, where a is a variable parameter. Presume that is normalized. The resulting energy expression for the hydrogen atom is E= a2/5-a/2 in atomic units.
Calculate this separation for n=100; also calculate the average radius, the geometric cross section, and the ionization energy. Could a thermal collision with another hydrogen atom ionize this Rydberg atom
For the reaction 3 C2H2=C6H6 at 25c the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K
What is [Pb^2+] in a saturated solution of PbCO3 if Na2CO3,with a common ion is added to give [CO3^2-]=3.0x10^-4 M? PbCO3 Ksp=7.4x10^-14
Given a barometric pressure of 756.0{rm mmHg} , calculate the pressure of gas sample (a) as indicated by the manometer
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