@X@user.full_name@X@ @GMU: ACS-Radioactive substances decay by first-order kinetics. How many years would be required for a sample containing technicium-99 to decrease to 43.44% of its initial activity? The half-life of technicium-99 is 2.20e5 years.

@X@user.full_name@X@ @GMU: What is the balanced reaction for the following galvanic cell?Cd(s)| Cd2+(aq) || Al3+(aq) | Al(s)

@X@user.full_name@X@ @GMU: ACS-Determine the cell potential for the reaction below if [Ag1+] = 0.3133M and [Al3+] = 0.0101M 3Ag1+(aq) + 1Al(s) → 3Ag(s) + 1Al3+(aq) E°= 2.460V

@X@user.full_name@X@ @GMU: ACS-It took 514.9 s for 68.28% of a substance to react according to first-order kinetics. What is the value of the rate constant?

@X@user.full_name@X@ @GMU: One mole of NO2 gas was compressed from 41.102 L to 23.543 L. What was the ΔS of the process?

@X@user.full_name@X@ @GMU: ACS-It took 836.2 s for 64.81% of a substance to react according to first-order kinetics. What is the value of the rate constant?

@X@user.full_name@X@ @GMU: Using the Boltzmanns formula calculate the entropy of 2.41e16 coins if they are randomly distributed.

@X@user.full_name@X@ @GMU: ACS-It took 658.4 s for 44.32% of a substance to react according to first-order kinetics. What is the value of the rate constant?

@X@user.full_name@X@ @GMU: What is Kp for the reaction below, if Kc = 8.19e-6 at 190.7°C?3A(s) + 5B(g) → 3C(g)

Prior to replacing an ostomy device in a patient, it is most important to: