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In a 100 ml sample of a buffer solution, the propanic acidconcentration is 0.50 molar and the sodium propanoate concentrationis .50 molar. To this buffer solution, 0.0040 mole of solidNaOH is added. Calculate the pH of the resulting solution.
35.5 grams of an unknown substance is heated to 103.0 degrees celsius and then placed into a calorimeter containing
What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency \rm 1.5\times 10^{15}~Hz
Which of the following species is present in the greatest concentration in a 0.100 M H2SO4 solution in H2O
The concentration of a cytostatic drug, cyclophosphamide, in urine was determined by GC/MS/MS. The component of interest in a 5.00 mL aliquot of urine was extracted with 20 mL of diethylether.
A certain substance has a heat of vaporization of 44.76 KJ/mol. At what kelvin temperature will the vapor pressure be 4.00 times higher than
What is the concentration of hydronium ion from pH and the concentration of hydroxide ion from pOH
Calculate the pH of a solution prepared by dissolving 0.30 g of BaO in enough water to make 0.800 L of solution.
Window glass is typically made by mixing soda ash (Na2CO3), limestone (CaCO3), and silica sand (SiO2) and then heating to 1500 degrees Celcius to drive off Co2 from the Na2CO3 and CaCO3
How many kilojoules of heat are required to melt a 10.0-g popsicle at 0 C? Assume the popsicle has the same molar mass and heat of fusion as water.
Calculate the molality of a sucrose (C6H22O11) solution containing 14.3 g of sucrose in 676 g of water
a solution is made by dissolving 20.0 mL CH3CN. what is the mole fraction of methanol in the solution?
how many grams of water can be produced from the combination of 25 grams of hydrogen and 225 grams of oxygen? how much
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