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What would be the percentage error of water if the volume was 5.0 ml, Mass A of the Graduated Cylinder is 19.50, mass B with the water is 24.61, with a density of 1.02 I keep getting different answers and I would love it if someone would walk me through.
the air in the laboratory was measured with a barometer to be 7.20 x 10 squared mm Hg. what is the laboratory air pressure in atm.
A galvanic cell is prepared by immersing a strip of nickel metal into an aqueous 1M NiSO4 and a strip of silver metal into aqueous 0.100M AgNO3. The two solutions are separated by a porous barrier.
how many moles of oxygen are combined with 4.20 moles of chlorine atoms in
Buffers are important physiological compounds that resist a change in pH. Calculate the pH of system that is 0.25 M benzoic acid and 0.75 M benzoate if the pKa = 4.2.
Compute the change in internal energy delta e for a system that is absorbing 35.8 kJ of heat as well as is expanding from 8.00 to 24.0 L in volume at 1.00 atm. Remember that 101.3 J= 1 l*atm.
Presume that in a certain semiconductor the ratio of electronic mobility, µe, to hole mobility, µh, is equal to 10, the density of holes is Nh=1020 m-3, as well as the density of electrons is Ne=10-19 m-3. The measured conductivity is 0.455 ohm-1...
Calculate the pH of a 0.02 M solution of oxalic acid (H2C2O4). Ka1 = 5.9 x 10^-2, Ka2 = 6.4 x 10 ^-5. Calculate the concentration of oxalate ion, (C204^2-) in the solution
the hydrated salt is overheated and the anhydrous salt thermally decomposes one product being a gas. will the reported
Identify the reaction type and propose a reasonable mechanism for the acid catalyzed reaction of 1,4-benzene dimethanol with sigma-decalactone (in a 1:1 stoichiometry).
an unknown gas effuses at a rate that is only 0.468 times that of o2 at the same temperature. what is the molar mass of
Write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water, H2O. Phases, such as (aq) or (l), are optional.
the molar volume of a certain solid is 161.0 cm3 at 1 atm and 350.75 k its melting temperature. the molar volume of the
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