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Calculate the concentrations of all species in a 0.100 M H3PO4 solution given the following Ka: 7.5 X 10^-3 for H3PO4^- 6.2 X 10^-8 for H2PO4^- and 4.8 X 10^-13 HPO4^2
Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of sodium cyanate (NaCNO) and 1.0 mole of cyanic acid (HCNO) in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 × 10^4]
Calculate brightness of a wavelength undergoing Rayleigh scattering.
A cylindrical glass tube 13.3 cm in length is filled with mercury ( density= 13.6 g/mL ). the mass of mercury needed to fill the tube is 107.5 g. calculate the inner diameter of the tube.
How many grams of methanol must be added to 7.50kg of water to lower its freezing point to -15.0^circ C? For each mole of solute, the freezing point of 1 {rm kg} of water is lowered 1.86 ^circ {rm C}
What is the freezing point of a solution made by dissolving 352g of ethylene glycol C2H6O2 on 648 g of water the freezing point of pure water is 0.0C and kf of pure water is -1.86Cm?
If some air remained in your syringe along with the natural gas sample, would that make your result greater or less than the actual molar mass of natural gas? is the same true for your sample of unknown gas?
Write a reaction mechanism for the dehydration of 4,5-dimethyl-3-hexanol in concentrated phosphoric acid. Use curved arrows to show electron movement and clearly show the major product formed.
how many moles of excess reactant are present when 366 mL of .206 M sulfuric acid reacts with .596 L of .172 M sodium hydroxide to form water and aqueous sodium sulfate
A compound composed of iron and carbon monoxide, Fe x (CO) y, is 30.70% iron. What is the empirical formula for the compound
How many mL of H2 (g) measured at STP are produced at a platinum cathode in the electrolysis of H2SO4 (aq) by 4.35 A of electric current in 6.00 min? a. 112 b. 16.3 c. 364 d. 182 e. 91.0
The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 8.3×10-4 atm in the atmosphere, what is the pH of water in equilibrium with the atmosphere
What Celsius temperature does oxygen measure .25 L if thepressureis kept constant
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