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A helium-filled balloon of the type used in long-distance flying contains (1.3 107 L) of helium. Let us say you fill the balloon with helium on the ground where the pressure is 709 mm Hg and the temperature is 13.0°C. When the balloon ascends to a height of 1 miles where the pressure is only 527. mm Hg and the temperature is -35°C, what volume is occupied by the helium gas? Assume the pressure inside the balloon matches the external pressure.
Calculate the concentrations of all species in a 1.75 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
Calculate the percent population of the first 10 rotational energy levels for HBr (rotational constant B = 8.46cm^-1) at 298K?
for each formula unit of sodium decahydrate: Na2SO4 * 10H2O, a) how many atoms of each kind are present? B) how many water molecules would be liberated for every molecule of the hydrate that is decomposed by heating?
Gold has a face-centered cubic structure and has a density of 19.3 g/cm3. What is its atomic radius?
How many grams of lanthanum chloride LaCl3 must be added to 1 kg of water to lower the freezing point of water by 1.1 degrees C?
Calculate the value of ?Grxn in a biological cell in which [ATP] = 5.0 mM, [ADP] = 0.20 mM, and [HPO42-] = 5.0 mM.
A .483 mol sample of graphite was heated with 2.14 mol oxygen gas to form carbon dioxide. Graphite is the limiting reagent in this reaction. Calculate the total moles of gas present after the reaction?
Aluminum is a lightweight metal (density=2.70 g/cm^3) used in aircraft construction, beverage cans, and foils. a) What is its density in kg/m^3? b) How many pounds would an aluminum clock measuring 1.0 m x 2.0 m x 1.5 m weigh
consider a nonmetal atom which we will give the symbol x. the element x is a gas at room temperature and can easily
The Greek mathematician Archimedes is credited with discovering how to verify the amount of pure gold in an irregularly shaped object (e.g., a crown) by placing it in water. How much water should be displaced by a pure gold object having a mass of..
Suppose that a liquid is 11 times denser than water If you were to sip this liquid at sea level using a straw what would be the maximum length of the straw
What will have the highest Rf value and which will have the lowest out of naphthalene (non polar), butyric acid (polar), and phenyl acetate (slightly polar) when developed on a silica gel TLC plate using benzene as the mobile phase
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