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What is the composition of this mixture on a %, by mass, basis? Show all calculations; report answer to the maximum number of significant figures possible
Explain why acid chlorides can be used to prepare amides but amides are not generally used to prepare acid chlorides?
What reaction pathway is followed when the compound shown is heated with a concentrated solution of sodium ethoxide (NaOCH2CH3) in ethanol?
White vinegar used to carry out a reaction by the method of titration. What do you think the greatest source of error in determination of end-point/ and why?
Calculate the inital pH of buffers A, B, & C using the Henderson-Hasselbach equation.
The reaction X(s) ? X(g) is known at 25oC to have standard enthalpy, free energy, and entropy changes of 146.8 kJ, kJ, and 175.4 J/K. At what temperature (oC) does X(s) sublime?
What formula of the percipitate formed? and what do you observe upon the addition of dilute HNO3 and what equillibrium has been disturbed? would you expect lead chloride to dissolve in dilute HNO3?
What are the importance of amino acids in physiological processes, in nutrition and in the different uses of these
What you observed upon the addition of NH3(aq) to magnesium chloride solution / what species are present in the test tube?and what happened when we add NH4Cl?
supposed the theoritical yield in a reaction is 68.8g, and the percent yield is 66.0%. What is the actual yield of product obtained?
Methanol (CH4O), which is used as a fuel in high-performance racing cars, burns in the presence of O2 to form CO2 and H2O. The molar masses for all substances are given under the balance equation.
following hybridization these 4 unpaired electrons can form covalent bonds. In order to promote an s electron to an empty p orbital, energy is required. Is it energetically favourable to promote thi
One mole of sucrose weighs 342.3 grams. 1mol=6.02*10^23 molecules. Dietary fats (typically 18-20 carbons) contain about 9 dietary calories per gram. Assume all food consumed goes to making ATP
Consider the weathering reaction describing the breakdown of K-feldpar to form the clay mineral kaolinite, a reaction of particular importance in tropical soils
Using the weak acid that you were assigned in this experiment and .100M NaOh, describe exactly (show calculations) how you would prepare 100.0mL of a buffer at pH = 5.50
Calculate the molar concentration of OH- ions in a 0.540 M solution of hypobromite ion (BrO^ -\K_b = 4.0* 10^- 6.)
If a buffer is prepared using equal amounts of acetic acid and sodium acetate predict what the pH of the solution will be.
You want to make one liter of a solution containing 10 mg/ml sodium phosphate, 10 mg/ml sodium chloride, and 10 mg/ml potassium nitrate. How much of each starting solution do you need to use, and ho
If a buffer is made up to be 1.0M in acetic acid and 1.0 M in sodium acetate, predict how much acid will be required to change the pH of 100mL of the buffer by 0.1 pH units.
what is the minimum distribution coefficient that permits the removal of 99% of a solute from 50 mL of water with a. two 25mL extrations with toluluene
The pH of a white vinegar solution is 2.29. This vinegar is aqueous solution of acetic acid with a density of 1.09 g/mL. What is the mass percentage of acetic acid in the solution?
Assume you dissolve .378 g of the weak acid benzoic acid in enough water to make 1.00e2 ml of solution and then titrate the solution with .200 M NaOH.
A buffer is prepared by dissolving .0250 mol of sodium nitrite in 500 ml of 0.0329 M nitrous acid. Assume no volume change after NaNO3 is dissolved. calculate the pH of this buffer.
The distribution constant for x between n-hexane and water is 9.6 Calculate the concentration of x remaining in the aqueous phase after 50ml of x are treated by extraction with the following quantit
Calculate the total concentration of dissolved cadmium (i.e. sum of the concentrations of free Cd 2+ and Cd-chloride complexes) in a 0.1M NaCl solution that is in equilibrium with otavite at atmosph