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Sketch the curves for (A) the titration of a typical weak acid (30.0ml of 0.10 M) with a strong base (0.10 M) and (B) the titration of a typical strong base (30.0ml of 0.10 M) with a strong acid (0.10 M). Indicate the approximate pH's at the equivalence points, as well as starting and ending pH's. (you need not actually calculate these pH values, estimate them).
The US consumed 18.8 million barrels (Mbbl) of crude oil per day in 2009. The BP Gulf Oil Spill totaled roughly 200 million gallons of crude oil.
The following reaction is investigated (assume an ideal gas mixture): 2N2O(g) + N2H4(g)-> 3N2(g) + 2H2O(g) Initially there are 0.10 mol N2O and 0.25 mol N2H4, in a 10.0 L container. If there are 0.06 mol of N2O at equilibrium, how many moles of N..
A 303- sample of unknown solution reacts completely with to form 14.1 . What was the concentration of the solution?
if 77.0 mL of .150 M HCl (aq) is needed to neutralize all the NH3(g) from a 2.25 gram sample of organic material, calculate the mass percentage of nitroge in the sample.
What volume of oxygen gas at 25 degrees Celcius and 1.00 atm is produced from the decomposition of 22.33 mL of a 30.0% (by mass) solution of hydrogen peroxide?
Consider the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
What is the average speed of the sprinter if A sprinter set a high school record in track and field, running 200. M in 22.0s .express your answer in kilometers per hour?
calculate the minimum energy a photon must have to produce an electron hole pair in an extrinsic semiconductor of band gap 1.3 electron volts.
N2O4(g) + KCl(s) → NOCl(g) + KNO3(s) Find out oxidation number of each and find which one is reduced and which one is oxidized by Using oxidation number concept? Also write net ionic equation and ionic equation.
A 248 mL gas sample has a mass of 0.436 g at a pressure of 753 mm Hg and a temperature of 27 degrees celcius.what is the molar mass of the gas
How many grams of formic acid, HCOOH, must be added to 0.160 L of 0.150 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.30? Assume no volume change. Ka of HCOOH = 5.0 10-4.
What is the pressure in millimeters of mercury of 0.0100 mol of helium gas with a volume of 211 mL at a temperature of 50^circ C?
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