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A) A balloon filled with 2.00 L of helium initially at 1.55 atm of pressure rises into the atmosphere. When the surrounding pressure reaches 490. mmHg, the balloon will burst. If 1 atm = 760. mmHg, what volume will the balloon occupy in the instant before it bursts?
Express your answer with the appropriate units.
B) What Celsius temperature, T2, is required to change the volume of the gas sample in Part A (T1 = 13 °C , V1= 1970 L ) to a volume of 3940 L ? Assume no change in pressure or the amount of gas in the balloon.Express your answer with the appropriate units.
1.isomerization of cyclopropane to propene is yielding the activation energy for this process is 274 kjmol. by what
A sample of hard water has 1.5g Ca+2 in every 500mL of water. Calculate the molality an ppm Ca+2 in this sample.
A buffer consists of 0.20 M KHCO3 and 0.44 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 multiplied by 10-7 and Ka2 = 4.7 multiplied by 10-11. (a) Which Ka value is more important to this buffer
Compare the stability of a tertiary carbocation, a secondary carbocation, and a primary carbocation, each with the formula C9H19+. Be sure to delete a hydrogen at the positive center and set the total charge to cation when you setup the calculatio..
15.73 grams of a solution containing 8.43% acetic acid, HC2H3O2, is mixed with water and titrated with a 0.523 M solution of KOH. How many milliliters of the KOH solution are required to reach the equivalence point?
One mol of this compound at 325 K is cooled at constant P to 275 K by contact with a large reserve at 275 K. The temperature of the reserve does not change.
Determining the BOD of a water sample,it was found that the DO level was 9.3ppm before incubation and 6.7 ppm after five days of incubation.what is the BOD of this sample?
How do you understand the following terms: "carbon loading" and "bonding density" for RP HPLC packing material? Which one is the most important for HPLC? Explain.
Ksp for MgCO3 at 25C is 2.0x10^-8. What are the molar concentrations in a saturated solution at this temperature
What is the concentration of H+ in 0.0025 M HNO3? What is the pH of this solution? What is the OH- concentration in this solution
Calculate the maximum concentration of fluoride ion that could be present in hard water. Assume the only anion present that will precipitate is the calcium ion. (CaF2(s) Ksp,25C=4.0x10^-11)
Coniine, a toxic substance is isolated from poison hemlock contains only carbon, hydrogen, and nitrogen combustion analysis of a5.024mg sample yields 13.90 mg of CO2 and 6.048 mg of H2O. What is the empirical formula of coniine
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