“QUESTION 19 Based on the activity series, which one of the reactions below will occur? 2AGNO3 (aq) + Pb (s) à 2Ag (s) + Pb(NO3)2 (aq) SnCl2 (aq) + Cu (s) à Sn (s) + CuCl2(aq) O SnCl2 (aq) + Cu (s) à Sn (s) + CuCl2(aq) 3Hg (1) + 2Cr(NO3) 3 (aq) à 3Hg(NO3) 2 + 2Cr (s) QUESTION 20 The abbreviated (condensed) configuration for chromium (Cr) is [Ar]4s!3d10 [Ar]4s!3d5 [Ar]4s23d4 O None of the above.”


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