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In an experience designed to find out the molar mass of an unknown ester, a student dissolves 450 mg of the unknown intro 50mL of a NaOH/EtOH solution. Subsequent to the reaction of hydrolysis is complete the solution needs 19mL of sulfuric acid, 0.5 N, to neutralize it.
When influential the normality of the NaOH/EtOH solution, 20.00mL of that same NaOH/EtOH solution was neutralized by 10.00 mL of sulfuric acid 0.5 N.
Find out the concentration of NaOH used in this reaction as well as the concentration of NaOH that was left after the hydrolysis reaction to finally find the molar mass of the ester.
liquid mercury at atmospheric pressure and 298K to 1.25L at constant temperature requires 46.6kbar (kilobars) of external pressure. What is the isothermal compressibility of Hg(l)?
write mechanisms for the following reactions, which are used in chemical tests and derivative preparations: (a) the reaction of butanal with 2,4 dinitrophenylhydrazine reagent.
A 1.20 M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/cm3. Calculate the normality. Citric acid has three acidic protons.
why would a direct measurement of the heat of decomposition of sodiium hydrogen carbonate be impossible usig a coffee cup calorimeter.
What volume (in ml) of coffee should be diluted to 25ml prior to analysis using only standard transfer pipets with integer values from 1-10ml
what is the wavelength of the line in the Balmer series of hydrogen corresponding to the transition for n=5 to n=2? the constant for Balmer's equation is 3.2881*10^15 s-1
What is the Gibbs energy difference across the membrane at 37°C. The difference in concentration must be sustained by coupling to reactions that have at least that difference of Gibbs energy
a solution of h2so4 with unknownconcentration was titrated with the standard base with .0233molarity. a volume of
What is the pOH of a 0.0054 M KOH solution? 2. Rank H3PO4, H2PO4^-, and HPO4^2- in order of increasing acid strength.
If the mass of water surrounding the calorimeter was exactly 1000 g and the heat capacity of the bomb calorimeter was 1.75 kJ/°C, calculate the molar heat of combustion of liquid methanol .
Consider a sample of 3.5g of water, which has an equilibrium vapor pressure of 23.8mmHg at 25.0 degC. IF this sample is placed into a 6.00L flask, what mass of liquid water will remain when equilibrium is established
If a 2.1 L reaction vessel initially contains 725 torr of cyclopropane at 485 degrees C , how long will it take for the partial pressure of cylclopropane to drop to below 102 torr .
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