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Calculate the energy gap between the excited and ground states for the sodiumion. d) if you soaked the pickle for a long time in a different salt solution, such as strontium chloride, would you stil
Is the carbon atom associated with magnesium electrophilicor nucleophilic? Write the conjugate acid of a Gringard reagent, and explain why Grignard reagents are strong bases.
Why is it necessary to acidify the mixture obtained after the reaction of methyl benzoate with phenylmagnesium bromide?
Why is it unwise to begin addition of the sollution of methyl benzoate to the Grignard reagent before the latter hascooled to room temperature and then placed in an ice-waterbath?
Arrange the following compunds in order of increasing reactivity toward attack of a Gringard reagent at the carbonyl carbon atom: methyl benzoate, benzoic acid, benzaldehyde, and benzophenone.
If a student finds the molecular weight of an unknown liquid to be 142g/mol and the molecular formula of liquid isCHCl3,what is the percent error in the student'smolecular weight?
A .2420g sample containing calcium is dissolved, and the metalprecipitated as CaC2O4. The precipitate is filtered, washed and re-dissolved in acid. The pH is adjusted. 25mL of .0400M EDTA areadded,
Calculate the equilibrium concentrations of H2, I2 and HI at 700 Kif the initial concentrations are [H2] = 0.100 M and [I2] = 0.200M.
The enthalphy change for any reaction can be obtained by subtracting the sum of the enthalpy changes of formation of the reactants from the sum of the enthalpy changes of the formation of the produc
Find the values for the enthalpy changes of the formation of NaOH (aq), HCl(aq), KOH(s), and KOH(aq)
Nitrogen is dissolved in water with the total pressure of gas(Nitrogen + water vapor) over the water being 1.40 atm. The temperature is 25o C.
A dilute solution of bromine in carbon tetrachloride behaves asan ideal-dilute solution. The vapour pressure of pure CCl4 is33.85 Torr at 298K. The Henry's law constant when the concentration of Br2
If the mixture at equalibrium is compressed to half its origanal volume, will the reaction proceed to the left or the right to reestablish equalibrium?
You need 1000mL of 0.154M NaCl, but the only solution available is 1.50M NaCl. How much of this stock soluiton will you measure out to make your solution? (C1V1=C2V2)
There are 18mg of iron in a vitamin tablet. If there are 100 tablets in a bottle, how moles of iron are contained in the vitamins in the bottle?
A piece of dry ice (solid carbon dioxide) with a mass of 28.8g is allowed to sublime (convert from solid to gas) into a large balloon.
A 0.300g sample of propionic acid was dissolved in water to give 50.0ml of solution. This solution was ttitrated with 0.150M NaOH. What was the pH of the solution when the equivalence point was reac
Oxygen is dissolved in water with the total pressure of gas (Oxygen+ water vapor) over the water being 2.00 atm. The temperature is25o C. What is the concentration of Oxygen in the water?
Calculate the partial pressure of the NO2 when the atmospheric pressure is 755 torr(99.1 kPa) How many molecules of NO2 are present under these conditions at20 *C in a room that measures 15 X 14 X 8 f
The equilibrium constant, Kp, for the following reactionis 1.6 x 105at 1024 K: H2(g) +Br2(g) ↔ 2HBr(g). Find the equilibrium pressures of all gases if 10.0 atm of HBr is introduced into
The following reaction can occur when N2 andO2 com in contact at high temperatures: N2(g)+ O2(g)↔ 2NO(g). At 2400 K, theequilibrium constant, Kc, for this reaction is 2.5 x10-3.
Calculate the heat transferred from a reaction of 50.0 mL of 1.00MHNO3 with 50.5 mL of 1.00M NaOH solution. Assume the heat capacity of the mixture is 3.89 J g-1deg-1.
How do you find the central atom of a chemical compound? The general way is the element with the lowest number of lone electrons but how do you know when the number is the same?
Calculate the number of moles of HNO3 reacting when 50.0mL of 1.00M HNO3 and 50.5 mL of 1.00M NaOH solution are mixed.
After adding 36.02 mL ofNaOH solution, the student realized that she had neglected to add phenolphthalein indicator solution before starting the titration.