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How many grams of water at 0oC could be frozen to ice at 0oC by the evaporation of 493 grams of isopropyl alcohol?
A 50.0 mL sample of 0.55 M benzoic acid, C6H5COOH, a weak monoprotic acid, is titrated with 0.47 M NaOH. Calculate the pH at the equivalence point. Ka of C6H5COOH = 6.5 10-5
Consider the combustion reaction: CH4 (g) + 2O2 (g) = CO2 (g) + 2H2O (l) Is this an exothermic reaction? If 100g of natural gas (CH4) is burned, calculate the heat exchange (balance the equation)
A chemist found that a certain amount of a CFC gas required 186 seconds to effuse through a porous plug when the pressure was held constant.
Clausthalite is a mineral composed of lead selenide (PbSe). The mineral adopts a NaCl-type structure. The density of PbSe at 25C is 8.27g/cm^3.
Determine the partial pressure and total pressure of each gas in the vessel and process of reaction runs until eighty five of the Oxygen is used and the vessel get cooled to its starting or initial temperature.
The mass of the sample before heating was 3.327g and after heating the mass was 2.432g. What is the percent composition of sodium carbonate in the original mixture?
Compute the volume of CO 2 and water vapour produced and the volume of oxygen remaining, when 20.0 dm 3 of propane reacts with 120.0 dm 3 of oxygen. All gas volumes are measured at the same temperature and pressure.
The molar solubility of MnCO3 is 4.2 x 10-6 M. What is Ksp for this compound?
Finding Kc from Products' Moles, Volume and Percent Reacted, The following reaction occurs at 1600 deg. C. Calculate the equilibrium constant Kc for the reaction.
Determine the new equilibrium concentration of hydrogen, if the hydrogen concentration is raised by 0.299 M?
The percentage natural abundances of 39k and 41k are 93.2581% and 6.7302%, respectively. find out the isotopic mass of 41k.?
Calculate the work done (in joules) against a pressure of 1.0 atm at 25 o C. If 3 moles of H 2 react with 3 moles of Cl 2 to form HCl while
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