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During a lab experiment, we were to determine the relative level of saturation by adding, drop by drop, a solution of bromine in cyclohexane to oil and a fat, individually. However, the color that is supposed to be retained due to unreacted bromine did not persist as it should have. It took a considerable amount of drops (around 300 or more) before we had to skip that portion of the experiment.
Considering that the oil and fat we used were both commercial grade (I do not remember the brands), how would I predict (mathematically?) the number of drops or volume of bromocyclohexane should have been needed?
How many grams of CO2 were used during the month? molar mass of CO2 is 44.00995 g/mol.
Calculate the equilibrium pressure of NO if 2.00 atm and 1.00 atm of O2 are initially placed in a 1.0L container at 440K and the final total pressure in the container
Osmium has a density of 22.6 g/cm3. What volume would be occupied by a 21.8 g sample of osmium?
What is the mole fraction of solute and the molal concentration for an aqueous solution
Calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in Appendix 3. (?H°f (HgO(s)) = -90.7 kJ/mol and ?H°f (FeO(s)) = -272 kJ/mol.)
A gaseous mixture of O2 and N2 contains 30.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 505mmHg ?
Calculate the major product in the Williamson ether synthesis between 1-bromopentane and sodium 1-phenylethoxide. correct stereochemistry of the product must be shown in its with four bonds - with H - at the chirality center.
A solution contains one or more of the following ions: Pb 2+, Ca 2+, and Zn 2+. When sodium chloride is added to the solution, a precipitate forms
explain how a soap removes dirt from our bodies. describe the process in relation to the secondary attractive forces that are operative.
The element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. What is the percent abundance of the second isotope?
the current generator box was only 89.3% current efficient, losing some current. The production of the tri-iodide ion was by the same oxidation reaction as in our lab. What is the ppm of water in the 250 ml ethanol sample?
Hydrochloric acid (HCl) reacts with sodium carbonate (Na2CO3), forming sodium chloride (NaCl), water (H2O), and carbon dioxide (CO2). This equation is balanced as written: 2HCl(aq)+Na2Co3(aq) --- 2NaCl(aq)+H2O(I)+CO2(g)
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