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@X@user.full_name@X@ @GMU: What is the rate of consumption of A (M/s), if the rate of consumption of C is 0.261 M/s? Use the reaction below:2A + 3B + 4C → products

@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 1.669. The rate law of this reaction is Rate = k[CHCl3][Cl2]1/2.CHCl3(g) + Cl2(g) → CCl4(g) + HCl(g)

@X@user.full_name@X@ @GMU: Which reactant in the reaction below is an acid (this one first in the answer) and which reactant is a base?F- + H2CO3 → HCO-3 + HF

@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 1.080e9 M-1s-1 at -78.00°C and 2.40e9 M-1s-1 at -54.17°C?NO(g) + O3(g) → NO2(g) + O2(g)

@X@user.full_name@X@ @GMU: What is the pOH of 3.49e-3 M H2SO4 ?

@X@user.full_name@X@ @GMU: To what temperature would you have to heat bromine, Br2,(l) to cause its vapor pressure to become 443.8 mm Hg if its heat of vaporization and boiling point are 31.40 kJ/mol and 331.9 K, respectively?

@X@user.full_name@X@ @GMU: LiCl has a face-centered cubic unit cell in which the Cl- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density if the ionic radii of Li+, Cl- ions are 76.22 pm and 181.0 pm, respectively?

@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 0.1852. 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: What would the pH be after addition of 19.15 mL of 0.1000 M NaOH to 25.00 mL of 0.1000 HA (a weak acid, Ka = 3.71e-4)?

@X@user.full_name@X@ @GMU: Determine the concentration of A after 94.514 seconds if the initial concentration of A was 0.2021 M and the first order rate constant is 4.176e-3 s-1.