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A sample of helium gas at 27.0 °C and 3.00 atm pressure is cooled in the same container to a temperature of -73.0 °C. What is the new pressure?
15.0 mL of 0.50 M NaOH is added to a 100.-mL sample of 0.376 M NH3 (Kb for NH3 = 1.8 x 10^-5. What is the equilibrium concentration of NH4^+ ions? The answer is 9.0 x 10^-5 M.
alcohols are less volatile than ethers of the same molecular weight, but the two classes of compounds have approximately the same solubility in water because.
A 270- flask contains pure helium at a pressure of 755 . A second flask with a volume of 485 contains pure argon at a pressure of 727 torr.
Suppose four weighings of a crcucible were found to be 10.231 g, 10.278 g, 10.256 g, and 10.363. Obtain the average (mean) weight of the crucible
Write a balanced net ionic equation for the neutralization reaction, and calculate the molarity of the tartaric acid solution.
Problem- For a particular redox reaction ClO2- is oxidized to ClO4- and Ag is reduced to Ag. Complete and balance the equation for this reaction in basic solution. Phases are optional.
Use the Beer-Lambert Law to calculate concentration given the following information
The decomposition of hydrogen peroxide to gaseous O2 and water is a spontaneous process, yet H2O2 is stable for long periods of time. Explain
Using tabulated data, and the fact that the boiling point of mercury is 337.7C, calculate S for mercury vapor.
suppose that you suspend a 10.0kg mass of iron from a height of 200metes. the outside temperature is 300ka. what is the
What volume of hydrogen gas is required to produce 2.1 mL of hydrogen bromide gas? Molecular formula- HBr
If a certain gas occupies a volume of 14 L when the applied pressure is 7.0 atm , find the pressure when the gas occupies a volume of 3.5L.
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