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Calculate the entropy change for 0.5 mol of an ideal gas confined in 2.0L, which expands when the stopcock is opened, and the gas comes in contact with an empty 3.0L flask.
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.63-M NaOH is added to 440. mL of each of the following
Petroleum consumption in the US in 1990 supplied about 34.6E15 kJ of energy. Of this quantity, about 14.3E15 kJ was supplied by foreign sources.
The equivalence point is reached after addition of 25.0 ml Naoh a) calculate the ionication ka for the acid HA
Calculate how many such photons are emitted per second by a 80.0-W incandescent lightbulb if we Assume that the light has an average wavelength = 510.0 nm, .
Consider the titration of 50.0 mL of 0.217 M HN3 (Ka = 2.6 x 10-5) with 0.183 M NaOH. Calculate the pH of the solution after the addition of 29.6 mL of NaOH solution.
Fundamentals of acids and bases - Water self ionizes to a small extent creating equal concentrations of hydronium and hydroxide ions. Find the molar concentration of these ions in water at 25 o C?
The half-life of carbon-14 is 5,730 years. If you started with 100.0 g of carbon-14, how much carbon-14 would remain after 4 half-lives.
For a particular reaction, H = -30. kJ and S = -88 J/K. Assume that H and S do not vary with temperature
Calculate the molar solubility of AgCl in a solution made by dissolving 10.0 g of CaCl2 in 1.50 L of solution.
Calculate the change of volume of the cube at a depth of 1.000 km (disregarding the effects of temperature). Take the mean density of sea water as 1.03 g/cm3
Suppose you have a sample of sodium weighing 11.42 g. How many atoms of sodium are present in the sample.
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
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