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The heat of formation of MnO is -385 kj/mol and that of Al2O3 is -1670 kj/mol. What is the heat of the reaction in kj2Al + 3MnO --> 3Mn + Al2O3?
If the temperature in the laboratory is 22.7oC and the atmospheric pressure is 0.966 atm, what volume would be occupied by the carbon dioxide produced in this reaction (in cm3)?
If 4.5 of ammonium chloride were dissolved in 200 L of water what would be the ammonium chloride concentration in mg/L
I dissolved .5 grams of mustard in 3 mL of distilled water. I was asked to determine the mass percentage of acetic acid in mustard, so I added 2.5 mL of NaOH to turn the mustard solution red.
What volume of oxygen is needed to react with solid sulfur to form 6.20 L of sulfur dioxide?
The corresponding densities of liquid water and water vapor are 0.958 kg/L and 0.000598 kg/L, respectively. Calculate the change of pressure for a one degree change in temperature.
3.38 grams of nitrogen gas are mixed with excess oxygen gas. The reaction yields 6.63 grams of nitrogen monoxide. nitrogen (g) + oxygen (g) -> nitrogen monoxide (g)
what is the likely magnitude of the equilibrium constant K? Hydrogen is used as a rocket fuel because it is very light and reacts explosively and completely with oxygen. For the combustion reaction
Given stock solutions of glucose (1M), asparagine (100 mM), and NaH2PO4 (50 mM), how much of each solution would you need to prepare 500 mL
What is the wavelength of a photon of electromagnetic radiation having a photon energy of 4.56X10^-19 J? Report your answer in nanometers, to the correct number of significant figures.
A 89 L sample of dry air is cooled from 134°C to -18°C while the pressure is maintained at 2.85 atm. What is the final volume?
Estimate the molar heat of vaporization of a liquid whose vapor pressure doubles when the temperature is raised from 85 ºC to 95 ºC.
Calculate the pH of the 0.20 M NH3/0.24 M NH4Cl buffer. B)What is the pH of the buffer after the addition of 10.0 mL of 0.10 M HCl to 55.0 mL of the buffer?
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