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What volume of a stock 0.0242 M of KOH solution is required to titrate 0.147 g of oxalic acid dehydrate, H2C2H4 . 2H2O to a phenolphthalein endpoint?
What is Ka? The answer is 8.1E-10. Hope you can help
Determine the molarity of a solution of twenty grams of Ammonium bromide, NH4Br, in enough water to produce 132 mL of solution?
What would the concentration (or activity) of Hg2+(aq) be in the solution if equilibrium existed between the water in soil pores, the gas and cinnabar
A scientists places 4.00 moles of Argon, Ar (g) and 2.00 moles of Helium, He (g) into a flask at the temperature of 298 Kelvin and measures the pressure to be 3.00 atm. calculate the pressure due to Helium gas?
An organofluorine compound has a density of 0.773 g/L at 18.5 C and 223 mm Hg pressure. calculate the molar mass of the compound
Assume that the amino acids with ionizable side chains have the following pKas: Asp 3.65; Glu 4.25; His 6.0; Lys 10.53, Arg 12.48; Cys 8.18; Tyr 10.07. Also Assume that the a-amino group has a pKa of 9.62, and the a-carboxyl group has a pKa of 2.3..
Why do the metals Co, Rh, and Lr form octahedral complexes (rather than tetrahedral or square planar complexes)?
3.00×10-3 mol of HBr are dissolved in water to make 18.0 L of solution. What is the concentration of hydroxide ions, [OH^-], in this solution?
What volume of O2 at 798 mmHg and 39 celsius is required to synthesize 19.0mol of NO
how many meters away is a cliff if an echo is heard one half second away? assume that sound ws traveled at 343 m/s on that day.
A gas expands and does P-V work on the surroundings equal to 259 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
If the photosynthesis portion of the carbon cycle represents the world's capacity for generating biofuels (in addition to supplying food) what percentage of the world's biomass production would be needed to displace the 6 Gt/yr fossil fuel usage
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