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An aqueous solution at 27 degrees Celsius contains 3.6 grams of a protein in a 200 ml sample. The osmotic pressure is .0203 atm. Define what is the molar mass of the protien?
Draw the configurational isomers of 1-bromo-4-methylcyclohexane. (b) Draw the conformational isomers of the structures drawn in (a).
If a sample of pure silver (Ag) contains 3.35 x 1022 atoms of silver, how many moles of silver are in the sample?
The vapor pressure of benzene is 100 mmmHg at 26.1 C. Calculate the vapor pressure of a solution containing 26 g of camphor (C10H16O) dissolved in 98.5g of benzene. (Camphor us a low-volality solid.)
1. how many times would a mole of timbits placed end to end reach from here to mars and back. distance from earth to
A constant electric current deposits 0.365 g of silver metal in 12960 seconds from a solution of silver nitrate. What is the current? What is the half reaction for the deposition of silver. Molar mass of Ag is 107.9
A mixture of p-nitroaniline and o-nitroaniline is separated by column chromatography. which compound will be eluted first? Give reason.
If 100.0J of energy are added to 25.0g of water at 50 degrees celcius,what will the final temperature of the water be?
Using curved arrows to symbolize the flow of electrons, write the stepwise mechanism for the bromination of anisole to provide the major monobromination product. Write the resonance structures for any charged, delocalized intermediates that are in..
The reaction can be represented as {\rm 2 NI_3 (s)\rightarrow N_2 (g) + 3 I_2 (g)},~{{\Delta H}}_{\rm rxn} = -290.0~{\rm kJ} Find the change in enthaply when 16.0g of \rm NI_3 decomposes.
How much 0.54 M NaCl, "physiological saline," can be prepared via the dilution of 250 mL of a 6.0 M NaCl solution?
A 50.0-mL sample of 0.300M propionic acid, HC3H5O2 (a weak acid), was titrated with 0.150 M NaOH. Ka for propionic acid is 1.3 x 10-5.
1. why should activated carbon be used during a recrystallization. 2. if a little activated charcoal does a good job removing impurities in a recrystallization, why not use a large quantity
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