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The Kw value decreases and temperature decreases. Is the auto ionization of water exothermic or endothermic
The density of lead is 11.3 g/ml . The water level in a graduated cylinder initially at 217 ml rises to 286 ml after a piece of lead is submerged. What is the mass in grams of the lead?
A gas mixture contains 1.25 g N2 and 0.85 g O2 in a 1.55-L container at 18 °C. Calculate the mole fraction and partial pressure of each component in the gas mixture.
The calculations are based on the principal components of meat being fat ( acetone soluble) and protein (acetone insoluble or fat-free meat in report sheet ).information, the calculations correctly calculate what quantity, % fat or % fat-free meat..
At 25 degrees C, what are the molar H3O+ and OH- concentrations in (e) 0.200 M NaOCl? (f) 0.0860 M CH3CH2COONa
Hard water contains alkaline earth cations such as Ca2+ which reacts with CO32- to form insoluble deposits of CaCO3. Will a precipitate of CaCO3 form if a 250mL sample of hard water having [Ca2+] = 8.0x10-4M is treated with the following
Water and 8.00 mol/L potassium nitrate solution are mixed to produce 700 mL of a solution with a concentration of 6.00 mol/L. What volumes of water and potassium nitrate solution are used?
What is the wavelength of a photon of electromagnetic radiation having a photon energy of 4.56X10^-19 J? Report your answer in nanometers, to the correct number of significant figures.
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity
If a temperature increase from 10 °C to 30 °C doubles the rate constant for the reaction, what is the value of the activation barrier for the reaction.
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of H+ is decreased by a factor of 3
Express the hamiltonian operator for the internal motion of Li atom and the proper expression for the approximate
A 250.0ml sample of air at 100.0 K is warmed to 200.0 K at constant pressure.What is the volume of the air sample at the new temperature.
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