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A beaker with 1.40×102mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.10mL of a 0.410\it M \rm HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
a cylinder measuring 5.7 cm wide and 6.8 cm high is filled with gas. The piston is pushed down with a steady force measured to be 11 N.
Calculate the maximum numbers of moles and grams of iodic acid (HIO3) that can form when 635g of iodine trichloride reacts with 118.5g of water.
what number of grams of NaHCO3 in a .210 g piece of antacid would generate 38.0 moles of CO2, if the CO2 is measured at 20 degrees C and 1.00 atm.
Calculate the mass of water vapor produced when 6.00 L of propane (C3H8) gas undergo complete combustion at a temperature of 250C and a pressure of 1.00 atm.
Molar concentration, 2.20g of solid NaOH are added to 250mL of a 0.10M FeCl2 solution. Given that Ksp for Fe(OH)2 is 1.6 x 10 -14, calculate the following
The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust and other resources is about 26 million tons. the equation for the reaction is S + O2= SO2.
the density of an aqueous ethanol solution is .789 g/mol. How many grams of ethanol should be mixed with water to make 225mL to make a 4.5% ethanol solution?
0.375 kg of water are in a well insulated container at 21.3 c. After 4.184kj of heat are added to the water, what is the final water temperature ?
It's volume is 224mL at a temperature of 60 degrees Celsius and a pressure of 880 torr. Find the molar mass
When the flask is allowed to cool the vapor condenses and aire again refulls the flask. Re weighing the flask and figure out the the wight of the unknown vapor which filled the flask during the boiling. Explain why it is not necessary to know the w..
In a flame test experiment, sodium gives the brightest and most persistent color in the flame. Do you think that potassium could be detected visually in the presence of sodium
The population mean of the bulb lifetime is 950 h and the population standard deviation is 50 h. calculate the fraction of bulbs expected to have a lifetime less
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