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Question- A solution of equal concentrations of barbituric acid and sodium barbiturate was found to have pH = 4.01. (a) What are pKa and Ka for glyceric acid? (b) What would the pH be if the concentration of acid was twice that of the salt?
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The dipole moment μ of HBr (a polar covalent molecule) is 0.82 D (debye), and its percent ionic character is 12.1%. Estimate the bond length of the H-Br bond in picometers.
A 100.0-L flask contains a mixture of NO2 gas and CO gas. If the concentration of NO2 is 5.5 × 105 ppm, and the total pressure is 790 torr, what is the partial pressure of CO in the flask?
In spectroscopy, the ratio of the intensity of radiation that passes through (I) the sample and the intensity of the radiation (Io) that is directed at the sample being analysed is called
at 1 atm, how much energy (kJ) is required to heat 81.0g of H2O(s) at -22.0 degrees celcius to H2O(g) at 119.0 degrees celcius?
A solid sample containing some Fe^2+ ion weighs 1.062 g. It requires 24.12 mL 0.01562 m KNno4 to titrate Fe^2+ in the dissolved sample to a pink end point
Question- What hybridization is required for central atoms that have a tetrahedral arrangement of electron pairs. A trigonal planar arrangement of electron pairs. A linear arrangement of electron pairs
The recovery of CaCo3 was attempted by adding #m H2SO4 instead of 3M HCL to the SiO2/ CaCO3 residue.
Problem- The radioactive decay of a certain sample produced 993 disintegrations per minute. Exactly 5.00 days later, the rate of decay was found to be 265 disintegrations per minute. Calculate the half-life, in days, for the decay of this sample.
Suppose a sodium hydroxide solution were to be standardized against pure solid primary standard grade KHP. If 0.4538 g of KHP required 44.12 ml of the sodium hydroxide to reach a phenolphthalein endpoint what is the molarity of the NaOH solution
A 0.692 g sample of glucose, C6H12O6, was burned in a constant volume calorimeter. The temperature rose from 21.70 °C to 25.22° C. The calorimeter contained 575 g of water, and the bomb has a heat capacity of 650 J/K. What is ?U per mole of glucos..
what is methanols vapor pressurenbspit boils atnbsp65.0 degc and has a heat of vaporization deltahvap 37.4 kjmol. at
It required 105 s for 1.0 L of the gas to effuse. Under identical experimental conditions it required 31 s for 1.0 L of O2 gas to effuse. Calculate the molar mass of the unknown gas.
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