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Why do we switch the solvent in chromotagraphy column and which solvent should be switched for
A cube of metal has a mass of 0.321 kg and measures 3.05 cm on a side. Calculate the density and identify the metal.
NaOH + CO2 -→ Na2CO3 + H2O . If the average human body discharges 536 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft?
The standard molar enthalpy of vaporization for water is 40.79 kJ/mol. What mass of steam is required to release 500. kJ of energy upon condensation? (Molar mass of water is 18.02 g/mol.)
A 20.0-mL sample of this glucose solution was diluted to 0.500 L . How many grams of glucose are in 100. of the final solution
Evaluate reversibility of a process where an ideal monoatomic gas is first slowly compressed 10-fold by a gradually increasing external pressure (gas remains in thermal equilibrium with the surroundings)
Which of the following reactions will have the greatest rate at 298 K. Assume the frequency factor A is the same for all reactions. EXPLAIN YOUR ANSWER. No credit given if no explanation.
At 212 mm Hg and 24 °C, a sample of gas occupies a volume of 125 mL. The volume is increased to 325 mL and the temperature is reduced to -5.0 °C. What is the final pressure of the gas in the flask?
The following reaction is example of elimination and substitution reaction. Categorized this reaction as an E1, E2, or SN1, SN2 CH3CH2O¯ + CH3CH2Br ? CH3CH2OCH2CH3 + Br¯ Please, explain.
Equilibrium constant from standard potential data, Calculate the equilibrium constants of the following reactions at 25°C from standard potential data
KHP is an acid with one acidic hydrogen and a molar mass of 204.22 g/mol. In the titration, 20.46 mL of the sodium hydroxide solution was required to react with 0.1082 g KHP. Calculate the molarity of the sodium hydroxide.
if the half life of a certain radioactive element is 1,250 years what is the percent of atoms remaining after 7,500 years is ?
When measuring horse radish peroxidase you found that a purified preparation has a specific activity of 10mmolar/sec/mg protein. suppose you added to an assay a competitive inhibitor that would not produce a colored product.
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