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A balloon was filled to a volume of 2.50 rm L when the temperature was \rm 30.0^{\circ}C. What would the volume become if the temperature dropped to rm 11.0^{circ}C.
Molecule X has an absorbance of 0.287 at 247nm when a 7.67 x 10^-5 M solution is measured in a 2.25 cm cell. What is the molar absorptivity of X
Alkanes are organic molecules that contain only carbon and hydrogen atoms connected through single bonds. In the IUPAC naming system, all alkanes end in the suffix ane and begin with a prefix determined by the number of carbon atoms in the molecul..
Describe the bonding in NCl- using a molecular orbital description. Assume the molecular orbital levels are ordered as in N2. What is the NCl- bond order? How any unpaired electrons are present?
Write balanced net ionic equation for the neutralization of equal molar amounts of HNO_2 and KOH
Calculate the concentration of a noncompetitive inhibitor (Ki=2.9 x 10^(-4) M) needed to yield 90% inhibition of an enzyme-catalyzed reaction.
Calculate the [Cr+3] in equilibrium with Cr(OH)4-(aq) when 0.010 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at a pH of 7.3. Kf for Cr(OH)4-(aq) is 8.0 x 1029.
A solution was prepared to have a density of 1.20 g/mL and a molality of 2.24 m at 22oC. The Mm of the solute is 63.10 g/mol. (a) What is the molarity of the solution?
A certain volume of a 0.90 M solution contains 4.1 g of a salt. What mass of the salt is present in the same volume of a 2.8 M solution
write a chemical equation for the titration with methyl orange the weak base used was sodium carbonate and the weak
Calculate how the amount of AgCl(s )will change when the equilibrium is disturbed by Adding AgNO 3
Air contains nitrogen, oxygen, argon, and trace gases. if the partial pressure of nitrogen is 587 mm Hg, Oxygen is 158 mm Hg, argon is 7 mm Hg, and trace gas pressure is negligible, what is the atmospheric pressure?
consider a van parked in a lot outside a professional football stadium in atlanta ga on a sunday afternoon. one ounce
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