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You have a 250.0 mL sample of 0.25 M HF acid (Kg = 7.2 x 10-4). Calculate the pH of the best buffer.
the density of aluminum is 2.7 g/cm cubed, if the volume of this object is 12ml, what is the mass of the grams?
Suppose you performed a distillation of a solution containing 1-pentanol (C5H12O), 2-pentanol (C5H12O), 3-pentanol (C5H12O), and methyl alcohol (CH4O).
A 100 liter air tank housed in a gas station ruptured suddenly and air originally at 5atm escaped to the surroundings at 1atm and 25°C. Find ?S of air, had it been let out slowly in a reversible manner
The concentration of carbon monoxide in an apartment is 62 micrograms/m^3. How many grams of carbon monoxide are present in a room measuring 10 x 12 x 7.5 feet? Use correct number of sig figs.
The density of Toluene (C7H8) is .867 g/mL, and the density o thiophene (C4H4S) is 1.065 g/mL. A solution is made by dissolving 10.5 g of thiophene in 250 mL of Toluene.
Consider a container of gas under set pressure, volume, and temperature. What would happen to the pressure if volume was doubled and temperature was increased by a factor of two? Explain your answer.
Discuss the two main mechanisms in nucleophilic substitution reactions. Provide examples, show reaction diagrams, discuss controls of reaction rates, stereochemistry
Important information about Identifying unknown substances, Compound A (C7H14O) burned with a yellow, nonsooty flame and did not decolorize a bromine-methylene chloride solution. It did give a positive 2,4-dinitrophenylhydrazine test
For each of the following equilibria, use Le Chatelier's principle to predict the direction of reaction when the volume is increased.
If 1.0 mole of NOCl and 1.00 mole of Cl2 are placed in a 1.00-liter container and permitted to react at this temperture, will the reaction shift to the left or to the right
a gas mixture contains helium and oxygen at respective partial pressures of 255 torr and 0.450 atm. what is the total
Explain the fact that KOH is much more soluble in liquid ammonia containing a little water than in pure liquid ammonia.
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