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A 17.5 g mass of ice at 273K is added to 125g of H2O(l) at 325K at constant pressure. Is the final state of the system liquid or ice? calculate ?S for the process. Is the process spontaneous ?
An electron microscope employs a beam of electrons to obtain an image of an object. What energy must be imparted to each electron of the beam to obtain a wavelength of 10.0pm? Obtain the energy in electron volts (eV) (1eV= 1.602x10^-19J )
A sample contains Ba3(PO4)2, CdS, AgCl, NH4Cl, and ZnS. Identify the soluble ions after the addition of 6 M HCl; H2S and 0.2 M HCl; OH- to a pH of 8; and (NH4)2HPO4 with NH3. A) Ba3(PO4)2 B) NH4Cl C) CdS D) ZnS E) AgCl
During a titration, a student used 31.92 ml of a .1000 M NaOH (aq) to neutralize 30.0 ml of a . 2488 M oxalic acid solution. a. Write the balanced equation for the neutralization reaction ( you need the formula of oxalic acid)!
A buffer is made up 0.24 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, and 0.17 M of sodium propanoate, CH3CH2COONa. What is the pH of the solution.
given that CO2 makes up .0355% of the atmosphere what is the maximum concentration fo CO2 in H2O. Using Henrys law C=kP where k for CO2 = 2*10^-3
How do intermolecular attractions influence the solubility of a solute in a particular solvent
the particle , electron is in lowest possible enrgy state. what is the probability of finding electron between 0.2 nm to 0.35 nm from one side of the wall.?
calculate the number of moles of sodium carbonate present in a mixture of sodium bicarbonate sodium carbonate and a
The Haber-Bosch process is a very important industrial process. In the Haber-Bosch process, hydrogen gas reacts with nitrogen gas to produce ammonia according to the equation 3H2(g)+N2(g)--->2NH3(g)
A sample of a gas weighs 2.880 g and has a volume of 1010.0 ml at 685.0 torr and 29.0 C. What is its molar mass
A 5.0 L sample has a pressure of 5.0 atm. What is the volume of the anesthetic given to a patient at a pressure at a pressure of 1.0 atm?
The human eye is able to detect as little as 2.35 × 10-18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light that can be detected by the human eye. Physical constants can be found here.
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