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In an effusion experiment, it was determined that nitrogen gas, , effused at a rate 1.812 times faster than an unknown gas. What is the molar mass of the unknown gas?
Although the viscosity varies over a factor of more than two in the series from hexane to nonane, the surface tension at at 25 degrees Celsius increases by only about 20% in the same series. How do you account for this
Calculate ΔE for a system undergoing an endothermic process in which 15.6kJ of heat flows and where 1.4kJ of work is done on the system.
The natural uranium/lead "clock" technique can be used to estimate the age of rocks. assume that at the time of solidification from the molten state a rock contained the radioactive isotope uranium-238. U-238 decays to a stable end product, lead-2..
Inspection of an IR spectrum rarely reveals the identity of the compound. However, one can often identify what?
At 25.0 C a solution has a concentration of 3.179M and a density of 1.260 g/mL. The density of the solution at 50.0 C is 1.249 g/ml. What is the molarity of the solution at 50.0 C
53.5 g of an ideal gas of molecular weight = 30.5 g/mol are confined at a pressure of 133 mmHg. The density of the gas is 0.228 g/L. Compute the temperature of the gas in degrees Celsius.
Calculate the partial pressure of the hydrogen gas using the atmospheric pressure and the vapor pressure of water at the temperature of the solution. Assuming ideal gas behavior, calculate the number of moles of hydrogen gas evolved.
How much heat energy, in kilojoules, is required to convert 68.0 grams of ice at -18.0 degrees C to water at 25.0 degrees C
Specify whether a simple distillation or a fractional distillation would be more suitable for each of the following purifications, and briefly justify your choice.
Draw the structure of the following three isomeric amides with chemical formula C6H11NO. Draw all three structures in the same window, DO NOT separate them with an arrow
Calculate the entropy change for vaporization of 18g of H2O? The molar enthalpy of vaporization for water is 44 kj/mol and the boiling point is 100 degrees celsius
How would the presence of a double or triple bond help to determine the geometric shape of a molecule?
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