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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.
Complete and balance the following redox equation. What is the coefficient of H2O when the equation is balanced using the set of smallest while-number coefficients. MnO4^- + SO3^2- ---> Mn^2+ + SO4^2- (acidic solution)
What volume of the solution must be used to make 800 mL of 0.15 M. potassium permangate from a 0.20 M. potassium stock solution.
A certain weak base has a Kb of 7.40 x 10^-7. What concentration of this base will produce a pH of 10.06
What is the empirical formula for an prganic compound whose percentage composition is 40.0% carbon
A: 2-methyl-1-bromohexane B: 1-bromohexane which of the above compounds will react the fastest with NaI in acetone?
as the sample coolsmoisture from the atmosphere condense on the outside oftheevaporating dish before the mass is
a small amount of the solid mgso4 7h2o is put in a crucible. the solid is gently heated by a bunsen burner until all
the radius of a aluminum atom is 143 pm. how many aluminum atoms would have to be laid side by side to span a distance
Solid aluminum metal and diatomic chlorine gas react spontaneously to form a solid product. Give the balanced chemical equation (including phases) that describes this reaction.
What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear?
A layer of peat beneath the glacial sediments of the last ice age has a carbon-14/carbon-12 ratio that is 22.6% of that found in living organisms.
A saturated gaseous organic molecule is formed by replacing all hydrogen atoms with an unknown combination of F, and Cl atoms. The percent mass of Cl in the organic compound
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