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A 50.0-mL volume of 0.15 M HBr is titrated with 0.25 M KOH . Calculate the pH after the addition of 20.0 mL of KOH.
At 123?C, the pressure of a sample of nitrogen is 1.45 atm. What will the pressure be at 267?C, assuming constant volume?
The solubility of AlF3 is 6.7 g AlF3 per liter of solution. The density of a saturated AlF3 solution is 1.0 g/mL. The Ksp of AlF3 is
how much heat (in kj) is needed to convert 866g of ice at -10 degree C to steam at 126 degree C? (the specific heats of ice and steam are 2.03 j/g degree C and 1.99 j/g degree C.
An unknown compound with a molecular formula of C8H18 reacts with chlorine in the presence of light and heat. From the reaction, only one compound with the formula C8H17Cl can be isolated. What is the structure of the original unknown compound?
N2 + 3H2 --> 2NH3 what volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia?
given a list of the natural sciences, including mathematics, physics, chemistry, nbiochemistry, biology, ecology, where does one science end and another one begin?
discuss at least three potentially hazardous features associated with concentrated sulfuric
for the coordination compound crnh34no22 clo43a how many ions will this compound create in aqueous solution ?b what is
Determine the minimum excitation energy of an electron constrained to rotate in a circle of radius equal to the Bohr radius (the value of Bohr predicts for the electron-hydrogen distance in the n=1 state) around a fixed point.
Why does it take significantly stronger magnetic and electrical field strengths to move the beams of alpha particles compared with the beams of electrons (beta particles)
In a proton nmr spectrum a methylene peak appeared at delta = 2.1 ppm when a simple 60 MHz spectrometer was used. At what frequency would this peak appear if the scale were instead given in Hertz
A 3.0 L cylinder is heated from an initital temperature of 273 K at a pressure of 105 kPa to a final temperature of 377 K. Assuming th amount of gas and the volume remain the same, what is the pressure (in kilopascals) of the cylinder after being ..
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