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What is the pH of a solution prepared by mixing 25mL of .10M CH3CO2H with 25 mL of .010M CH3CO2Na? Assume that the volume of the solutions are additive and that Ka= 1.8 x 10-5 for CH3CO2H.
How many moles of CO2 will be produced if 3.119 g of O2 are reacted completely?
952 cm3 container of gas is exerting a pressure of 108 kpa while at a temperature of 48 degrees celsius. calculate the pressure of this same amount of gas in a 1236 cm3 at a temperature of 64 degrees celsius.
Calculate the Gibbs free energy (in kJ/mol) at 80 degrees celsius. Assuming that the change in enthalpy is negligible over this temperature range
Calculate the heat evolved from a mixture of 14.6 L of sulfur dioxide at 1 atm and 294 K and 15 g of oxygen if the following reaction occurs: 2 SO2(g) + O2(g) ?? 2 SO3(g) ?H? = ?198 kJ
A laser pulse with wavelength 555 contains 4.40 of energy. How many photons are in the laser pulse?
Calculate the experimental percent by mass of copper in the sample and the theoretical mass percent of copper in copper (II) acetate monohydrate.
What is the molar mass of 1.00-g sample of gas that occupies a volume of 750 mL at a pressure 725. mm Hg and a temperature of 27.0°C?
A helium-filled weather balloon has a volume of 2.4 × 102 L at 99 kPa pressure and a temperature of 0°C. What is the mass of the helium in the balloon?
Calculate the pH of a 1.00L of buffer that is 0.120M HNO2 and 0.180M NaNO2. What is the pH of the same buffer after the addition of 1.00mL of 12.0M HCl. (pKa of HNO2=3.04)
What is the pressure of the gas in mmHg if the volume is changed to 8.53 L? The temperature remains constant. In scientific notation.
The atmospheric pressure at the summit of mount mckinley is 575 mmHg on a certain day. What is the pressure in atmospheres and in kilopascals?
Assuming a 70.% yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 9.9 *10^4 kg of coal that is 0.33 mass % sulfur?
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