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What is the hydronium ion concentration and the pH of a solution formed when 30mL of 0.30M HNO3 is titrated with 43mL of 0.20M NaOH at 25C?
To pre-form the density gradient, a volume of 9.5 ml of a 60% solution of percoll was added to two polypropylene centrifuge tubes and balanced accurately.
If 10.7 mL of .110 M NaOH is required to reach the equivalence point of a solution of citric acid, how many mL of NaOH are required to completely neutralized this solution?
Write three orbital designations that would be incorrect and explain why each is incorrect. For example, 1p would be an incorrect orbital designation because there is no p sub-shell in the first orb
If a formic acid/formate buffer is 0.031 M in formic acid and has a pH of 3.91, what is the molar concentration of the formate ion? The pKa of formic acid is 3.75.
What is the chemical formula of the product formed from the reaction of calcium chloride and potassium oxalate? Make sure to include the correct number of waters of hydration.
You must determine the amount of acetic acid and sodium acetate required. The Ka of acetic acid is 1.8 X 10^-5. Show the calculations for the preparation of 100 mL of an acetic acid - sodium acetate
Question: A 0.100 M solution of a certain weak acid, HA, is found to have a pH of 2.45. Calculate the % ionization for the acid. Enter the answer as a decimal number with 3 decimal places. Do not en
The addition of anhydrous calcium chloride to the crude product obtained from the separation procedure often results in the product becoming clear (transparent). What causes the clearing?
A 2.30 L sample of neon at 5.35 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 7.00 atm after the neon is added, what was the original pressure (in atm) of
A certain light bulb is rated at 60 W when operating at the RMS voltage of 120 V. What is the peak voltage applied across the bulb?
If a carboxylic acid ester is exposed to an environment such as sweaty skin (acidic aqueous environment) for quite a while, what can happen? What would their fruity odors change to?
Phenolphthalein has a color change over the pH range of 8.2 to 10.0; methyl orange has a color change over the pH range of 3.2 to 4.4 although the phenolphthalein indicator is commonly used for neu
Immediately after the collision, the 1.6 kg object has a velocity of 0.99 m/s directed 390 from its initial line of motion. What is the speed of the 0.86 kg object immediately after the collision
One second after the bug starts from rest, what is its total acceleration? What angle does this acceleration make with ac?
A bug is on the rim of a disk of diameter 14 in that moves from rest to an angular speed of 78 rev/min in 4.4 s. What is the tangential velocity of the bug at the end of the 4.4 s?
Starting with the Michaelis-Menten equation given on the first page, answer the following questions: a) Write out the Michaelis-Menten model for an enzyme catalyzed reaction.
Why are some fruits sweet and some sour, whereas others have no specific taste? How does the ripening of fruit affect the process of seed dispersal?
In the Grignard synthesis of triphenylmethanol experiment, the procedure states that the additions of bromobenzene, methyl benzoate and hydrochloric acids must be done slowly. What might if these we
Strychnine, C12H22N2O2, is a weak base. An aqueous solution of 0.0515 M strychnine solution has a pH of 10.48. What is the Kb for strychnine based on these measurements?
Compare in your mind 3 different liquids: pure ethanol, a 50% ethanol/water mixture and a 50 % ethanol/methanol mixture. Rank these three liquids in order of increasing Ptotal when each liquid is in
Question: A sucrose (table sugar, molar mass 342 g/mol) solution was made by dissolving 68.2g of sucrose in 800 g of water. What is the freezing point of this solution if Kf of water is 1.86 degrees
Derive the maximum number of independent Killing vector fields that can exist in a spacetime of dimension N . Compare the number of Killing vectors that exist in some of the metrics.
Calculate the elapsed time on Lucy's clock through this period of Susan's flight and compare this to those of Susan and Jane. Provide an explanation of the various elapsed times, and why they diff
Will the temperature decrease shift the equilibrium toward the reactants or products for a reaction characterized by a positive reaction enthalpy and positive reaction entropy?