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a). What is the pH of a buffer made by combining 0.025 moles potassium acetate with 0.015 moles acetic acid in 200 mL of water?
b). What is the new pH if 0.5 mL of 10 M HCl is added to the buffer in part a?
2.00 moles of a gas occupies 62.2 L at a par- ticular temperature and pressure. Its density is 0.900 g/L. What is the molar mass?
Synthesizing ethers via acid-catalyzed condensation reactions has limited usefulness. The conditions (sulfuric acid and heat) are also conducive to elimination products. Clarification of Organic Chemistry
What is the vapor pressure of a solution prepared by dissolving 51.0 g of C6H12O6 (a nonvolatile solute) in 120 g of water? (Assume the solution is ideal.)
Calculate the amout of coke needed to be burned in order to heat 500kg of water from 20 celsise to 50 celsise/ The heat of combustion of cock is 36.15kj/g
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
the solubility of sucrose common table sugar at 70 celsiusis 320 g100 g h2o.a.how much sucrose can dissolve in 200 g of
An oxide of manganese consists of 77.4% manganese by mass. Determine its empirical formula and enter it in the box below.
the instrument response S for each of the five solutions, measured with a colorimeter, was found to be 0.240, 0.437, 0.621, 0.809, and 1.009, respectively. What was the concentration of Fe3+ in the water sample?
The gas was obtained by boiling liquid nitrogen stored in a 180.0 L tank. What volume of N2 is released at 0.955 atm of pressure and 25 degree celsius from a tank full of liquid N2 (d=0.808 g.mL)?
Identify and discuss three key features associated with the combustion of polymeric materials or compounds that are relevant to the safety and health of an EH&S or a FS professional responding
an equilibrium mixture at 727ordm? contains 0.276 mol h2 0.276 mol co2 224 mol co and 0.224 mol h2o. co2 g h2 g ? co g
A metal forms the fluoride MF2. Electrolysis of the molten fluoride by a current of 3.86 A for 16.2 minutes deposits 1.07 (backwards "g") of the metal.
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