2.43 g magnesium was completely burnt in oxygen to give magnesium oxide. 2 Mg(s) + O2(g) → 2 MgO(s) (Relative atomic masses: O = 16.0, Mg = 24.3) (a) Draw the electronic diagrams of O2 and MgO, showing electrons in the outermost shell only. (b) (i) How many mole of magnesium was present?      (ii) How many mole of oxygen was required to completely react with the amount of       magnesium in (i)? (iii) Hence, calculate the amount of oxygen required to completely react with the magnesium. (c) Similarly, calculate the amount of MgO formed

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
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2.43 g magnesium was completely burnt in oxygen to give magnesium oxide. 2 Mg(s) + O2(g) → 2 MgO(s)

(Relative atomic masses: O = 16.0, Mg = 24.3)

(a) Draw the electronic diagrams of O2 and MgO, showing electrons in the outermost shell only.

(b) (i) How many mole of magnesium was present?
     (ii) How many mole of oxygen was required to completely react with the amount of       magnesium in (i)?

(iii) Hence, calculate the amount of oxygen required to completely react with the magnesium.

(c) Similarly, calculate the amount of MgO formed.

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