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Could someone explain this competition and interaction? I know that chromatography is based on the attraction with the stationary phase or mobile phase
If a protein sample has a molar mass of approximately 14,000 u, what is the expected freezing point depression when 1.00g is dissolved in 50.0mL of distilled water
What is the heat of the reaction which forms 1.00 mole of gaseous monatomic bromine from 0.500 mole gaseous diatomic bromine
Draw the reaction scheme (with arrows) of the Diels Alder rxn between maleic anhydride and furan. draw both the endo and exo adducts
Hydrogen bonding does not make a significantly large contribution to the overall stability of the DNA molecule. Explain
Do not delete any of the atoms or bonds in the ring or directly attached to the ring with the Erase button, and do not move atoms or groups directly attached to the ring by dragging them.
Draw the lowest energy conformation of 3-ethyl-2,4,4-trimethylheptane, depicting the C3-C4 bond on a sawhorse.
Are necessary to completely neutralize a solution in which 60.0g of NaOH have been dissolved
Carbon-14 has a half-life of 5730 years. A sample of carbon with a mass of 0.120 g has an activity of 40 decays/hr. The initial specific activity is assumed to have been 900 decays/hr/gram. How old
Write the structural formula for each of the following compounds.
A mass of 1.50 g H2O is sealed in an evacuated 3.0-L flask and heated to 55 °C. What mass of liquid water remains in the flask when equilibrium is established? The equilibrium vapor pressure of
Calculate the enthalpy of vaporization of Br2. This element has vapor pressures of 271 mm Hg and 565 mm Hg at 30.0 °C and 50.0 °C, respectively.
At 63.5C the vapor pressure ofH2O is 175 torr, and that of ethanol,C2H5OH, is 400 torr. A solution is madeby mixing equal masses of H2O andC2H5OH.
dinitrogen monoxide gas and 3.41g of carbon dioxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas. Be sure each of your answer en
Gaseous butane (C4H10) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O) . If of water is produced from the reaction of 3.49 g of butane
An ion contains a tin atom and three chlorine atoms. The Cl-Sn-Cl bond angles are less than 109.5 degrees. What is the ion, charge on the ion and hybrid orbitals used by Sn
Calculate the concentration of cadmium chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits.
If sealed glass bottle containing an organic solvent is dropped and breaks, pieces of glass may be propelled outwards because of build-up pressure that forms in the bottle. explain which is more dan
What masses of NaCl and water are needed to prepare 1000g of a solution that is 0.90% by mass
Claisen reactions use a stoichiometric amount of base and do not polymerize, unlike aldol reactions that use a catalytic amount of base and can polymerize.
Refer to the Galvanic cel below (the contents of each half-cell are written beneath each compartment): 0.10 M MnO4- 0.40 M Cr3+
When current is allowed to flow, which species is oxidized. What is the value of E0cell
Neon crystalizes in a face-centered cubic lattice. It's density is 1.45 g/cm3. What is the edge length of the unit cell? Note: The atomic weight of Ne is 20.2 g/mol, and Na is 6.02 x 10^23/mol
N2O2 draw valence bond drawings for the resonance forms-clearly labeling the sigma and pi bonds and hybrid orbitals.
The rare earth metal terbium is produced from terbium (III) flouride and calcium metal by a single replacement reaction. Given 27.5 g of terbium (III) flouride and 6.96 g of calcium, what is the the