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We titrate 20.0 cm3 NaOH solutions and in the equivalence point the volume of 0.2 M HCl solution is 15.0 cm3. Calculate the concentration of the NaOH solution.
At 320 K and 16 atmospheres, the molar volume of ammonia (NH3) is about 10 % less than that of an ideal gas. Explain this observation.
Calculate the mass of ethylene glycol (C2H6O2) that must be added to 1.00 kg of ethanol (C2H5OH) to reduce its vapor pressure by 12.0 torr at 35C. The vapor pressure of pure ethanol at 35C is 1.00x10^2 torr.
Which of the intermolecular forces is the most important contributor to the high surface tension shown by water and What is the quantum of light called?
"A student titrated a 10 mL sample of a saturated solution of borax. If the titration required 23.95 mL of 0.2556 M HCL to reach the endpoint, calculate the equilibrium molar concentration of B4O5(OH)(4 in the saturated solution"
Calculate the molar absorptivities for In- at 454 and 654nm, set up two simultaneous equations, and determine the molar concentrations of HIn and In- in the buffer solutions
Draw all the stereoisomers of 3-chloro-2-butanol. Indicate which isomers are enantiomers, which are diasteromers,
What is the density of a substance if a 2.50mL sample has a mass of 0.880g at room temperature? ( show calculations) What is the specific gravity of the substance?
a 19.3 g mixture containing sodium sulfide and calcium chloride. 86.9 sodium sulfide and 63.9 by mass chlorine. what is
A gold nucleus is located at the origin of coordiantes and an electron is brought to a position 2 angstrom from the origin. calculate the force between the gold nucleus and the electron
Stretched rubber band Touch the relaxed rubber band briefly to your upper lip. Quickly stretch your rubber band and immediately touch the stretched rubber band to your upper lip again
The tripeptide alanyllysylaspartate contains four ionizable groups with pKas of 2.0, 3.9, 9.9, and 10.5. Calculate the pI for this molecule.
What are the conditions where Nucleophilic Substitution will predominate over elinmation? ALSO What are the conditions of solvent, temperature
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