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Determine the procedure required for this standardization? An acidic solution is already been made, one needs to standardize it to determine its "known" concentration.
Discuss why red phosphorus is insoluble in hydrocarbons, high melting and not reactive with air while white phosphorus readily dissolves, is low melting and reacts rapidly with air.
Discuss why concentrated hydroxylamine is dangerous, even in the absence of another redox active compound. The 1999 explosion in Allen town, Pennsylvania occurred in an aqueous hydroxylamine purific
Determine the amount of sodium acetate and acetic acid required for this solution. A student needed 1000mL of a 0.10 M buffer of pH 4.0.
What temperature and pressure should be used for CO2 in near-critical fluid (NCF) extraction to get out the maximum amount of d-limonene with minimum removal of other terrenes when the feed is cold-
Calculate the procedure required for this standardization? An acidic solution has already been made, one needs to standardize it to determine its "known" concentration.
Determine the standard entropy of vaporization of ethanol at its boiling point 352 K. The standard molar enthalpy of vaporization of ethanol at its boiling point is 40.5 kJ/ mol
Determine the entropy change associated with lowering the temperature of 2.1 mol of ideal gas atoms from 104.28 degrees C to -42.44 degrees at the constant pressure, assuming that the heat capacity
What is the color of the resulting solution after the addition of the indicator at the endpoint of the titration when a Chemistry student is in the lab and determines that the theoretical end point
Calculate the pH and concentrations of K+, H+, H2PO4-, HPO42-, OH-, PO43- from a1.00L solution which is having 0250 mol KH2PO4 and 0.030 mol KOH.
Determine statically if all 10 ml sample may go out and if there are any outliers in the collected data. The QC dept requires that 10 samples of vinegar be analyzed per day by titration.
What is the needed pressure? (Gases can be treated as ideal.) Suppose that ammonia is produced at 450ΟC when the pressure is such that ΔrG for the reaction 1/2N2 (g) + 3/2 H2 (
Determine the entropy change associated with the isothermal compression of the 6.64 mol of ideal gas atoms from 5.81 atm to 14.75 atm?
Suppose you only need to consider the valence electrons. In the orbital diagram remember that each orbital is designated as a box or line and arrows used to represent the electrons. Be sure to label
The contents of the two flasks were mixed by opening a stopcock connecting them. Assuming that all operations were carried out at a uniform constant temperature, determine the final pressure in atm.
What is the approximate molecular weight of the compound when a 0.500 g sample was dissolved in the 50.0 g of benzene, and the resulting depression was 0.42oC (kf (benzene)= 5.065oC/m).
Determine the change in the entropy of neon. Assume ideal behavior. The temperature of 2.00 mol Ne (g) is increased from 25 degrees Celsius to 200 degrees Celsius at constant pressure.
Explain what mass of mercury vapor would be present if the air became saturated with it? The vapor pressure of mercury at25C is 0.227Pa. A bottle of mercury at25C was left unstoppered
Determine the probable structure of this ion? There is a trimetric silicate ion, Si3O9-6. Phosphorus forms and is electronic and is structural ion - what would be its formula?
How many iron atoms are in each molecule of hemoglobin? Hemoglobin contains 0.33% iron and has a molecular weight of 68,000.
What is the longest wavelength of light (nm) that can be used to eject electrons form the surface so this metal via the photoelectric effect? It takes 254 kJ / mol to eject electrons from a c
Explain by showing how this catalyst both accelerates the rate of reaction and regenerates it. A catalyst is something that accelerates the rate of reaction and is regenerated in the process. What i
Determine the lattice energy of calcium chloride given that the heat of sublimation of Ca is 121 kJ/mol and ΔHof (CaCl2) = -795kJ/mol.
How many Fe3O4 can be produced when 38.0g of H2O is mixed with 165g of Fe. Discuss what mass of reactant remains unchanged?
Discuss how would the graph of temperature versus volume distilled appear for a perfect separation of methanol (boiling point of 65.4 degrees C) and toluene (bp 110 degrees C) using the fractionati