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A 4.00-g sample of a mixture of CaO and BaO is placed in a 1.00-L vessel containing CO2 gas at a pressure of 730 torr and a temperature of 25 °C. The CO2 reacts with the CaO and BaO, forming CaCO3 and BaCO3.When the reaction is complete, the pressure of the remaining CO2 is 150 torr.
(a) Calculate the number of moles of CO2 that have reacted.
(b) Calculate the mass percentage of CaO in the mixture.
Explain ammonium hydroxide contains 16.1 mol/kg of ammonia. Compute the vapor pressure of ammonia over this solution at 298K.
The formation constant Kf for the complex ion Zn(OH)42- is 2.8 1015. What is the concentration of zinc ion, Zn2+, in a solution that is initially 0.50 M in Zn(OH)42-
It is found that 3.8 mL of a 0.01 g/L solution of NaOH is required to completely react withe all HCl. HOw many moles of HCl are present
caffeine is about 10 times as soluble in hot water as in cold water, a chemist puts hot water extract of caffeine in to an ice bath and some crystallizes. is the remaining solution saturated unsaturated or supersaturated and why?
An unknown liquid with a boiling point of 58 C at 670 mmHg is soluble in water, cyclohexane and alcohol, what's the liquid.
Compute the de Broglie wavelength of an electron accelerated from rest through a potential difference of (a) 100 V, (b) 1.0 kV, (c) 100 kV
Enough of a monoprotic acid is dissolved in water to produce a 0.0166 M solution. The pH of the resulting solution is 2.38. Calculate the Ka for the acid.
What will be the temperature difference needed in a hot-air balloon to lift 1.00 kg of mass. Assume that the volume of the balloon is 100 m3, the temperature of the ambient air is 25 oC, the pressure is 1.00 bar, and air is an ideal gas with an av..
On an average is an electron farther away from the nucleus when it is occupying a 2p orbital in hydrogen than when it is occupying a 2s orbital? Justify by computing the average distances
Mercury-205 has how many protons, neutrons, electrons, and electrons in the 1st quantum shell and in the compound BCl3 which is the more electronegative element?
A mixture of 80.0mL of hydrogen and 60.0mL of oxygen is ignited by a spark to form water. a) Does any gas remain un-reacted. Which one. b) What volume of which gas (if any) remains un-reacted
Compute the density of a solid substance if a cube measuring 2.01 cm on one side has a mass of 128 g. Compute the mass of a cube of the same substance measuring 8.31 cm on one side.
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