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A stock solution of perchloric acid is 70.5% by mass HClO4 and 29.5% by mass water. The density of the solution is 1.67 g·mL-1 at 20 C. Calculate the molarity of the solution.
What concentration of aqueous NH3 is necessary to just start precipitation of Mn(OH)2 from a 0.020 M MnSO4? Kb for ammonia 1.8 x 10^-5, Ksp for Mn(OH)2 4.6 x 10^-16.
which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
The heat of vaporization of water in this temperature range is 2.40 kJ/g. The heat capacity of water is 4.184 J/g.K. Answer in grams of water
How much free energy is made available by the pH gradient and membrane potential for the transport of protons INTO the cell?
predict the products of the reaction of acetophenone with 1) NaBH4 then H3O+ 2)aqueous acidic CrO3 3)NH2OH 4)CH3MgBr, then H3O+ 5) CH3OH, H+ catalyst
How much would an empty volumetric flask, (weighing 27.16 grams, has a volume of 100.4 cm3 ) weigh when filled with bromine, an element that has a density of 3.1028 g/cm3.
The ozone in the ozone layer absorbs UV light between 200 and 300 nm. Ozone is a compound with the chemical formula CO2. In the Earth's atmosphere, ozone exists only in the ozone layer.
A blend of polyethylene and PVC contains 10 wt °/. PVC. What is the molecular percentage of PVC
discuss in detail one way in which atomic nuclear decay takes place. what is the significance of atomic nuclear decay?
Calculate SO (universe) for the formation of 1.00 mol of HCl (g) from gaseous hydrogen and chlorine at 25 OC. Is the reaction spontaneous at that temperature
what can you conclude about the process of breaking bonds in the liquid as compared to the gas phase? Explain the difference in the heat of formation values between the two phases.
If the barometric pressure is 784 torr and the experiment is carried out at 25 oC, what is the pressure of the gas collected?
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