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List and draw all types of noncovalent interactions (charge-charge electrostatic, hydrogen-bonding, hydrophobic reactions) that can occur between the side-chains of the following amino acids.
c) Serrine and Glutamic acid
d) Threonine and Asparagine
For a particular reaction (2R(g) ? P(s)) it was found that at one constant temperature, the pressure of R dropped 1.00 atm to 0.500 atm in 32.0 minutes.
How many moles of HF (ka= 6.8 X 10^-4) must be present in 0.200L to form a solution with a pH of 3.25
NaOH solution is used to determine the amount of Mg(OH)2 in a sample of milk of magnesia, (molairty of NaOH is 1.172M). A 10.0 gram sample of milk of magnesia is required with 8.00 mL of 6.00 M HCl.
the calculation of the Ksp value be affected if the endpoint of titration was surpassed (i.e. too much HCl was added)?
Consider the following equation: 2HF (g) H2 (g) + F2 (g) k+ 1.00 x 10 ^-2. Given that 1.00 mol of HF(g) ,0.360 mol of H2(g) , and 0.750 mol of F2(g) are mixed in a 5.00-l flask, determine the reaction quotient,Q Q=?
Mixed in a constant-pressure calorimeter, the temperature of the mixture rose from 21.15 to 26.00. If the density of the solution is 1.0g/mL and its specific heat is 4.18J/g C, how much heat is evolved by this reaction in kJ
a storage container has the dimensions of 232mm by 0.145m by 32.5cm. If it is filled with liquid mercury (density 13.534 g/ml), what is the mass in kg of the mercury in the container
A 250-L tank is evacuated and connected to a 50.0-L bulb filled with compressed argon. After they are joined, the pressure in the bulb falls to 2.20 atm.
How many milliliters of 0.200 M NaOH will be required to titrate 14.5 mL of 0.479 M H2SO4?
How much time (in s) is needed for NOCl originally at a concentration of 0.0194 M to decay to 0.0026 M
What is the freezing point (C) of a solution prepared by dissolving 15.3 g of Ca(NO3)2 (formula weight=164 g/mol) in 115 g of water? The molal freezing point depression constant for water is 1.86 C/m.
HPLC analysis of basic analytes is better to perform at low pH when they are fully ionized (2 pH units lower than analyte pKa). For the analyte with pka= 5.6 and 60/40 acetonitrile/water eluent composition what should be the pH of an aqueous porti..
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