Income Tax Rate $0-$50,000 20% $50,000-$100,000 40% $100,000+ 50% Refer to the marginal tax rate schedule above. An individual earning $90,000 per year owes ____ in taxes.

@X@user.full_name@X@ @GMU: What is the correct expression for the solubility product of bismuth sulfide?Bi2S3(s) → 2Bi3+(aq) + 3S2-(aq)

@X@user.full_name@X@ @GMU: By how much would the rate of reaction (see below) change if the concentration of Cl2 increased by a factor of 1.753. The rate law of this reaction is Rate = k[CHCl3][Cl2]1/2.CHCl3(g) + Cl2(g) → CCl4(g) + HCl(g)

American households realize how durable, and generally awesome, Mexican glassware is, and they begin to purchase more and more Mexican glassware. As a result, the ____ the U.S. Dollar shifts, and the ____ the Mexican Peso shifts.

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 183.461 mm Hg at 18.01 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!

@X@user.full_name@X@ @GMU: The reaction below is an endothermic reaction. What would one have to do to increase the size of the equilibrium constant?C2H4(g) + H2(g)→C2H6(g)

@X@user.full_name@X@ @GMU: The osmotic pressure of an unknown solution is 1450.587 mm Hg at 32.95 °C. Which of the solutions below is the most likely one? Assume any salt is completely ionic!

@X@user.full_name@X@ @GMU: LiBr has a face-centered cubic unit cell in which the Br- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is the radius of Li+ if the ionic radius of Br- is 195.0 pm and the density of LiBr is 3.464 g/cm3?

@X@user.full_name@X@ @GMU: Uranium -238 decays in a series of steps to Pb-206. When the material is very old, one can treat the kinetics as a decay directly to Pb and the ratio of these two can be treated as a measure of the age of a rock. A rock containing 238U and 206Pb was examined to determine its approximate age. The molar ratio of 206Pb to 238U was 0.2029. Assuming no lead was originally present and that all lead formed remained in the rock, what is the age of the rock (in years)? The half-life of 238U is 4.50e9 yr.

@X@user.full_name@X@ @GMU: Hydrogen iodide decomposes at 410°C according to second order kinetics (see reaction below). The half-life for this reaction was measured to be 6.83e3 s when the initial concentration of HI was 4.75e-3 M. What is the rate constant for this reaction?HI(g) → H2(g) + I2(g)