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Question: What is the pH of a buffer solution prepared by mixing 10.0 mL of 0.15 M ammonia and 15.0 mL of 0.20 M ammonium chloride? Assume that the total volume of the solution is 25.0 mL. Kb for ammonia is 1.8 x 10-5.
A solution is prepared by dissolving 20.0 g of K2HPO4 and 25.0 g of KH2PO4 in enough water to produce 1.0 L of solution. What is the pH of this buffer
The half-life of carbon-14 is 5715 years. If an animal bone contains 20.0 grams of carbon-14 when the animal dies, how many grams of carbon-14 will be left in 17145 years (3 half-lives)
A system comprised of 2.900×10^1 g of Ne(g) cools from 170.0°C to 45.0°C at a constant pressure of 5.5 atm. The molar heat capacity at constant pressure for Ne(g) is 20.80 J K?1 mol?1. calculate q,w,delta E, ANDdelta H
Calculate the number of grams of alcohol present in 1.00 L of 78 proof gin. The density of ethanol is 0.798 g/mL.
The molality of sodium nitrate solution us 1.44m. What is mole fraction of NaNo3. The molar mass of NaNo3 is 85.06g/mol
Calculate the pH of a buffer solution with .10 moles of C2H5COOH and .13 moles of C2H5COONa in 1.5L
If ΔH = -60.0kJ and ΔS = -0.200kJ/K , the reaction is spontaneous below a certain temperature. Calculate that temperature. Express your answer numerically in kelvins.
a 670 ml gas sample at stp is compressed to a volume of 284 ml and the temperature is increased to 20 c. what is the
How do you correctly draw the lewis structure for acetone, (CH3)2OH. step by step, and reasoning for the structure.
Write the balanced reaction for nickel(II) carbonate reacting with sulfuric acid. Nickel(II) sulfate, carbon dioxide gas, and water are the reaction products.
Propane (C3H8) is burned in oxygen to produce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are reacted with 10.0 mol O2
Provide the arrow pushing mechanism of the synthesis of hexaphenylbenzene from diphenylacetylene
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