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You have a sealed, flexible balloon filled with argon gas.The atmospheric pressure is 1.00 atm and the temperature is 2°C.Assume that air has a mole fraction of nitrogen of 0.790 (i.e., 79 mol-% N2 in air), the rest being oxygen.
(a) Explain why the balloon would float when heated. Make sure to discuss which factors change and which remain constant, and why this matters. Be complete.
(b) Above what temperature would you heat the balloon so that it would float?
the frequency factor a is 8.7x 10 12 s- and the activation energy is 63 kj/mol, What is the rate constant for the reaction at 75C
A reaction takes place with a mass defect (lost mass) of 0.030kg. How much energy does the correspond to?
Write a dissociation equation of AlCl3 showing its sepatation into aqueous ions.
Salicylic acid, used in the synthesis of aspirin, has mass composition 60.87% C, 4.38% H, and 34.75% O. What is the empirical formula of the compound?
A solution is prepared by adding 1.10 g of solid NaCl to 50.0 mL of 0.100 M CaCl_2. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
Aluminum nitrate and ammonium chloride react to form aluminum chloride, nitrogen, and water. what mass of aluminum chloride is present after 74.7 g of aluminum nitrate and 56.8 g ammonium chloride have reacted completely.
Use reduction-potential values to explain which halides can be oxidized by Fe3+ or by MnO4- in acidic solution?
what is the dose in rads to the animal in the first 4.0 hours following the ingestion of the radioactive material?
Sodium methoxide CH3ONa is a weaker base than BuLi or nBuLi butyllithium. Recommend an explanation why it is not surprising to find that a weaker base is sufficient to prepare the Horner-Emmons-Wittig reagent.
A buffer having equal amounts of a weak acid and its conjugate base has a pH =4.4. A small amount of sodium hydroxide was combined to this buffer solution .
Question about Thermochemistry, Consider the reaction: H2(g) + Cl2(g) yields 2HCl(g) Change Heat = -184.6
What is the mole fraction of ethanol, CH3CH2OH, in an aqueous solution that is 20.0% ethanol by mass? 0.150
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