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A tank contains 20 L of compressed nitrogen at 10 bar and 25 degrees Celsius. Calculate [w] when the gas is allowed to expand reversibly to 1 bar pressure a) isothermically and b) adiabatically.
Dissolving NH4NO3 in water is an endothermic process. In fact, this reaction is often used in cold packs sold at the drug store. When 23.8 g of NH4NO3 was rapidly dissolved in 79.5 mL of water in a coffee cup calorimeter,
The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol.
what it is perscribed for 3.Mechanism of action( for example: how it binds to biological molecules, how it may inhibit enzyme activity.)
Osmium has a density of 22.6 g/cm3. What volume would be occupied by a 21.8 g sample of osmium?
The ester ethyl p-nitrobenzoate is more reactive towards nucleophilic acyl substitution than ethyl p-methyoxybenzoate.
Europium (Europium is a chemical element with the symbol Eu and atomic number 63 )crystallizes in a body-centered cubic lattice compute the unitcell edge length in pm if The density of Eu is 5.26 g/cm3..
A sample of helium gas has a volume of 241 mL at 0.83 atm. What pressure is needed to reduce the volume at constant temperature to 35 mL.
A gas occupies a volume of 75 ml when the pressure is 380 mmHg. What volume does the gas occupy at 1140 mmHg
What is the hydronium ion concentration of a solution with an hydroxyl ion concentration of 1.8 x 10^-10 M? D) What is the hydronium ion concentration of a solution with an hydronium ion concentration of 5.13 x 10 ^-9 M?
A catalyst has a avoid fraction of 0.40, an internal surface area of 180 m2/g and a pellet density of 1.40 g/cm3. Estimate the effective diffusivity of thiophene with hydrogen
48.61g od maagnesium was dissolved in diluted sulfuric acid and 490g of MgSO4. 7H2O was isolated from the solution. How many percent of impurities did the metal contain?
he endpoint of the titration was 9.98mL. Calculate the percent copper in the solid sample.
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