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Among these 3 [10] annulenes, only compounds 1 and 2 were isolated, compound 3 is very unstable. Explain.
calculate the empirical formula for a chemical compound which gives the following analysis 12.6 percent lithium 29.2
Calculate the quantity of heat in calories release when 241.62 g of water is cooled from 80.6°C to 28.0°C.
What is the molecular formula of a compound with the empirical formula NO¿ and a molar mass of 138.02 grams per mole?
the carbon dioxide that is exhaled by astronauts who are on a space shuttle is scrubbed by pumping the air through
A mixture of oxygen and hydrogen is examined by passing it over hot copper oxide and through a drying tube. Hydrogen reduces the CuO to metallic Cu. Oxygen then reoxidizes the copper back to CuO.
when 100 ml of an aqueous solution containing 1.0 g of caffeine is extracted with 10 ml of chloroform at room
Describe which would give a more accurate determination by freezing point depression of the molar mass of substance that is soluble in either solvent. Why
Estimate the temperature at which calcium carbonate is likely to decomp under 1atm of pressure. Reaction: CaCO3(s) -> CaO(s) + CO2 (g) For this rxn: dHstandard = 177.8 kJ and dS standard= 160.5 J/K (notice unit differences)
Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of Zn and H+ in the balanced reaction. Zn^2+(aq) + NH4+(aq) yields Zn(s) + NO3-(aq)
the solubility of sucrose common table sugar at 70 celsiusis 320 g100 g h2o.a.how much sucrose can dissolve in 200 g of
assuming ideal behavior, calculate the boiling point in C of solution that contains 64.5g or the non-volatile non-electrolyte quinoline( molar mass= 129g/mole) in 500 grams of benzene. For benzene the normal boling point is 80.10 C and Kb = 2.53C/..
Plot the radial functions for the 2s and 2p orbitals to explain how shielding plays into the relative energy of 2p electrons to 2s in a multi electron system. What is the relative energy in a hydrogenic (1 electron) system.
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