@X@user.full_name@X@ @GMU: Which of the crystalline substances below is an example of a ionic solid?

John Schreifels @GMU: What is the change in mass of 102Ru when it is formed from protons, electrons and neutrons if the atom has a mass of 101.90563 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: What is the pOH of 6.13e-3 M HCl?

@X@user.full_name@X@ @GMU: What is the pOH of a 0.1203 M H2CO3 ? See reaction belowH2CO3 + H2O → HCO-3 + H3O+ Ka = 4.300×10-7

¶ E, line 59. Photos of the applicants (A-D) are provided in Exhibits.Applicant C did not get the job. Based solely on appearance, Applicant C

@X@user.full_name@X@ @GMU: Calculate the pOH of 101.56 mL of a buffer initially consisting of 0.1517 M CH3(CH2)2CH2NH2 and 0.1119 M CH3(CH2)2CH2NH3Br after addition of 0.0021 mol of HCl. Assume that no volume change occurs after addition of the acid. The Kb of CH3(CH2)2CH2NH2 is 4.10e-4

@X@user.full_name@X@ @GMU: What is the fraction of A remaining after 63.846 minutes if the first order rate constant is 2.813e-4 s-1?

¶ D, lines 39-40. [A]pplicant must be able to lift and carry 25-pound bags of flour … (See Exhibit 1).This job requirement may exclude some individuals from obtaining the job. Which of these statements is true?

212FnlExam.pdf

¶ D, lines 57-58. If you test positive for Covid, you must report that to us. We will then alert any other employee(s) you worked with or were around that you have Covid so they can get tested or quarantine. Telling other employees that you have Covid is: