Answer Happy

SA. Given the following reaction: Mg(s) + 2 HCl (aq)- MgCl₂ (aq) + H₂(g) A student reacts a cube of Mg (s) measuring 0.500 inches on a side (density-1.74 g/cm³) with 17.0 g of an HCl(aq) solution that is 35.3% HCl by mass (density HCI (aq) = 1.210 g/mL). If the hydrogen gas produced by the reaction is collected over water at 20.0°C in a 2500-ml flask and the pressure measured at the end of the reaction was 458 torr, 1) what was the percent yield for the reaction? II) what mass of Mg metal remains unused, if any? 58. I) Using some or all of the following reactions, determine the &Hem as indicated: GIVEN REACTION: 8 Ni(s) +5g (s) 12 O₂(g) à 8 NISO, (s) AH-??? AH 156 kJ AH-297 kJ AH- 241 K Rxn 1: NISOs (5) NIO (s) + 5O₂ (g) Se (5) O₂ (g)-> SO₂ (g) Rxn 2: Rxn 3: NIO (S)-NI (s) + O₂(g) ii) Give the proper name for the compound NISO. ill-a) Give the shorthand electron configuration for the Ni atom ill-b) Circle the valence electrons in the electron configuration for Ni ill-c) Make a sketch of each of the 2 forms of d orbitals.