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A sample of gas is stored in 716 mL tank at 205 kPa and 300 K. The gas is transferred to a different tank with a volume of 925 mL and 325 K. What is the pressure of the gas in the second tank?
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
Histidine has three ionisable functional groups. Write the equilibrium equations for its three ionizations and assign the proper pKa for each ionization.
Boron often forms compounds that do not comply with the octet rule that are termed electron deficient. BF3, whose structure is shown below on the left, is an example of an electron deficient compound.
How much heat is needed to vaporize 2.42 g of liquid oxygen if the molar heat of vaporization for oxygen is 1,629 cal/mole?
what is the molarity of a solution when 2.25g NaF is dissolved in enough water to make 250mL of solution
If the initial concentration of N2O4 is 0.50 M, and no NO2 is initially present, what is the equilibrium concentration of N2O4? Kc = 0.0059 at 298 K N2O4 (g) 2NO2 (g)
What is the wavelength (in meters) of a proton (mass = 1.673*10^-24 g) that has been accelerated to 30% of the speed of light.
What is the enthalpy of vaporization of acetone (CH3COCH3) at its normal boiling point of 56.2?C? The entropy of vaporization of acetone is 88.3 J/K·mol,Answer in units of kJ/mol
A compound of bromine and fluorine is used to make UF6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58.37% by mass of bromine. Determine its empirical formula.
Calculate the 1) mls of 15M Acetic acid 2) the grams of sodium acetate 3) and the mls of water required to make a 500mM acetate buffer at pH 4.85
Iron has a body-centered cubic unit cell, and a density of 7.87 g/cm3. Calculate the edge length of the unit cell, in pm.
Physical propoerties and intermolecular forces, What type of intermolecular forces accounts for the following differences in each case?
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