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Explain we have assumed that the solid doesn't dissociate into more than one particle when dissolved. If this was an incorrect assumption as well as the solid did dissociate slightly. Then how must the calculated molar mass of solute from our experiment differ from the actual molar mass? The computed would be too high, too low, or unaffected compared to the actual? Define briefly.
A mixture of aluminum and zinc weighing 1.67g was completely dissolved in acid to give 1.69L of hydrogen gas measure at STP. What is the weight of aluminum in the original mixture
At what radius does the probability of finding an electron at a point in the H atom fall to 50 per cent of its maximum value
An exothermic reaction liberates 7.58 kJ of heat in a coffee cup calorimeter containing 157 grams of solution. The temperature of the solution in the calorimeter increases by 11.2°C. How much heat was absorbed by the calorimeter? Assume the specif..
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature increase of 11.0 °C for the solution.
A solution is initially 0.100 M in HOCl and 0.300 M in NaOCl. What is the pH if 0.030 mol of solid NaOH is added to 1.00 L of this solution
(1) indicates bond types. Give the range for (a) a nonpolar covalent bond (b) a polar covalent bond (c) an ionic bond. (2) name and describe the method for lattice enthalpy measurement
At 20 degrees Celcius and 1 atm (pressure), gold (Au) has a density of 19.32 g/cm cubed. What would be the volume of 2.510 kg of gold at the same temperature and pressure
Three gases (8.00 g of methane, 18.0 g of ethane, and an unknown amount of propane were added to the same 10.0-L container. At 23.0 degrees C, the total pressure in the container is 4.50 atm. Calculate the partial pressure of each gas in the conta..
Calcium hydroxide dissolves in water to the extent of 1.04 g/L. What is the value of Ksp for Ca(OH)2
Calculate the concentrations of all species in a 1.66 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
Calculate the wavelength of the absorption maximum for a metal complex ion that has a crystal field splitting energy of 279 kJ/mol. The final answer should be in nm.
Pure oxygen gas can be prepared in the laboratory by the decomposition of solid potassium chlorate to form solid potassium chloride and oxygen gas. How much oxygen gas in grams can be prepared from 98.4 of potassium chlorate
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