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Evaluate this probability density for an electron in the 1s-, 2s-, and 3s- orbital's of a hydrogenic atom. A quantity important in some branches of spectroscopy is the probability density of an elec
Determine the concentration of H3O+ and the degree of ionization of acetic acid for the above solution. Where the concentration of all type of solutions is 0.10M.
Determine the numbers of grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution which is having the CrCl3 for 45.0 min?
To 300. mL of this solution is added 15.0 mL of 6.00 M HCl. What is the pH of the resulting solution? A buffer is prepared by mixing 2.00 moles of HCN and 1.00 mole of NaCN in 1.00 liter solution.
A sample which is having 100.0 mL of 200.0 M methylamine, CH3NH2, is titrated with the 0.100 M HCl. Determine the pH at the equivalence point. Will the solution be BASIC, ACIDIC, or NEUTRAL?
Calculate the initial pH before the titration has begun when a 100.0 mL sample of 0.200 M methylamine, CH3NH2, is titrated with the 0.100 M HCl.
Discuss why BTB is green in the neutral water solution. In terms of Le Chatelier's principle, why does it turn blue when base is added and yellow when acid is added?
Determine what volume the dry gas occupy at standard conditions. Sixty litters of a gas were collated over water when the barometer read 670 mmHg, and the temperature was 20C.
Calculate the percentage of iron in a 3.0660 gram sample of an acid-soluble iron ore which yields a ferric oxide (Fe2O3) precipitate weighing the 2.0513grams?
Determine the percentage of chloride in the original sample when a silver chloride precipitate weighing the 0.2255 grams was obtained from the 0.3448 grams of a soluble salt mixture.
Calculate the advantage of calculating the free energy changes rather than entropy changes to find out the reaction spontaneity?
Determine the percentage of water in the sample when 0.4023 gram samples of impure barium chloride dehydrate weighed 0.3541 grams after it was dried at the 200oC for two hours.
At what height above sea level does he make the measurement? A mountaineer in the Rockies measures the air pressure to be 10% below that at sea level. At this altitude he finds a small mountain lake
What will be the resulting temperature of the water in °C if 14.5 kJ of heat are added to a 39.6 g ice cube at (-5.12)°C? When the specific heat capacity of water = 4.18 J K-1 g-1, ice
The formal charge for the H atoms is 0 for the hydronium atom, H3O+. The formal charge is +1 for the O atom. However, O is the most electronegative atom in hydronium.
Discuss what color would you expect the phenolphthalein into be after being added to the solution left after an alkali metal reacts totally with the water?
If the atmospheric pressure is 755 mmHg, explain how high (inmmH2O) is the column of water in the tube (d of Hg =13.5 g/mL; d of H2O = 1.00 g/mL)? A long glass tube, sealed at one end, has an inner di
Determine the numbers of grams of the first reactant are necessary to completely react with55.8 grams of the second reactant for the following precipitation reaction.
Determine the numbers of milliliters of mercury will saturate a room that is 15x12x8 feet with the mercury vapor at 25 degrees C? Mercury is an extremely toxic substance.
Determine the numbers of moles of HCl would it take to neutralize the sodium hydroxide produced if you are given a 0.3 g piece of sodium metal to react with water.
If 15.35 calories of the heat were lost on the transfer, and the final temperature of water and alloy in the beaker was 27.95C, describe the heat capacity of the alloy?
If the Na+ radius is 56.4 % of the Cl- radius and the distance among the Na+ nuclei is 566 pm, calculate the radii of the two atoms? The NaCl crystal structures consist of alternating the N
Compounds of hydrogen and boron are remarkable, not only for their unusual bonding, but also for their reactivity. With the more reactive halogens, for example, diborane (B2H6) forms trihalides even
Determine the numbers of calories are needed to warm the 20.4 g of water from 80°C to 100.0°C and convert it to steam at 100.0°C? The heat of vaporization of water is 540. cal/g.
How does the density of the object compare with the water and with the brine solution? Explain. An object floats in a7% solution of NaCl but sinks in the distilled water.