Blog

@X@user.full_name@X@ @GMU: What is the rate of consumption of C (M/s), if the rate of consumption of A is 0.231 M/s? Use the reaction below:2A + 3B + 4C → products

@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- + HS- → S2- + HF

@X@user.full_name@X@ @GMU: All of the crystalline substances below are examples of a molecular solid except ___?

@X@user.full_name@X@ @GMU: What is the cell voltage for the following cell?2Cu+(aq) + Sn(s) → 2Cu(s) + Sn2+(aq) ΔGo = -127.360 kJ

@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 7.04e3 s when the initial concentration of HI was 4.61e-3 M. What is the rate constant for this reaction?HI(g) → H2(g) + I2(g)

@X@user.full_name@X@ @GMU: Determine the molality of a 6.932 wt % aqueous solution of LiCl.

@X@user.full_name@X@   @GMU: To what temperature would the reaction below need to be heated to have a rate constant of 6.09e-4 M-1s-1 if the rate constant was 2.700e-4 M-1s-1 at 327.00°C and the activation energy was 166.00 kJ/mol?H2(g) + I2(g) → 2HI(g)

@X@user.full_name@X@ @GMU: When 10.93 g of citric acid was dissolved in 105.9 g of benzene, the freezing point was 275.9 K. What is the formula mass of this compound? The freezing point depression constant for benzene is 5.12 (°C*kg)/mol. The melting point and boiling points are 5.50°C and 80.10°C, respectively.

John Schreifels @GMU: What is the change in mass of 71Ga when it is formed from protons, electrons and neutrons if the atom has a mass of 70.9247005 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

@X@user.full_name@X@ @GMU: How much time in minutes would it take for a 1.9957 g sample of 33P to decay to a mass of 1.1357 g if it has a half-life of 2.160e6 s.