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For reverse-phase HPLC, a 25/75 mixture of CH3OH/H20 gives the same retention but different selectivity as what precentage of mixtures for acetonitrile/water and tetrahydrofuran/water?
A sample of gas has a volume of 2 liters at 40 degrees celsius. what volume will the gas occupy at 0 degree celsius.
Calculate the mass of solid sodium acetate required to mix with 100.0 mL of 0.1 M acetic acid to prepare a pH 4 buffer. Record the mass in your data table
Determine the partial pressure and total pressure of the gases and Find the partial pressure of carbon dioxide in a gas mixture
Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy).
Calculate the thickness of a salt layer left after evaporating an ocean of 35%u2030 salinity and 4-km depth.
If all of this O3 is converted to oxygen, O2, at the same temperature and pressure then what will be the volume of the oxygen formed?
Using the reaction 2C6H6+15O2--->12CO2+6H2O, what volume of carbon dioxide will be produced when 128.0 grams of benzene react.
How much heat is evolved when 1241 g of water condenses to a liquid at 100.°C?
Use the Nernst Equation to calculate Ecell at 25 C for electrolysis of aqueous sodium chloride if the concentration of chlorine in the brine solution is 4.5 M and the partial pressure of Cl2 is 0.001 atmospheres.
How can I make up 100ml of a solution containing Compound A (solid, purity of 83.7%) at 90 ug/ml and compound B (liquid, density 1.12 and purity of 90.5) at 30 ug/mL for HPLC reference standard.
Calculate the mass of nitrogen dissolved at room temperature in an 80.0 {rm L} home aquarium. Assume a total pressure of 1.0 {rm atm} and a mole fraction for nitrogen of 0.78.
Once the system has reached equilibrium, 5.00g of NO2 is injected into the vessel, and the system is allowed to equilibrate once again. Calculate the mass of N2O4 in the final equilibrium mixture.
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