What is the oxidation number on O in the following compound? MgO₂ (Positive numbers do not need tocontain a +). What is AG at 315 K for the following process at 1.0 atm?Br₂(1)→ Br₂(g)kJmolΔΗ = 31.0O 34.9 kJ○ 60.3 kJO 27.1 kJAS 93.0-O 1.71 kJO-29.3 kJJmol K=.

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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What is the oxidation number on O in the following compound? MgO₂ (Positive numbers do not need to
contain a +).

What is AG at 315 K for the following process at 1.0 atm?
Br₂(1)→ Br₂(g)
kJ
mol
ΔΗ = 31.0
O 34.9 kJ
○ 60.3 kJ
O 27.1 kJ
AS 93.0-
O 1.71 kJ
O-29.3 kJ
J
mol K
=
.

Expert Solution

Step 1

Oxidation number:

• Oxidation number of atoms in pure element or Atoms in free or uncombined elements is 0 (zero).

• oxidation number of oxygen usually -2 in most of its compound except in case of H2O2 (peroxide) where its oxidation number is -1, KO2 (superoxide) where its oxidation number is - 1/2 and OF2 where its oxidation number is + 2.

• sum of oxidation in the neutral compound is zero

• oxidation number of the monoatomic ions is equal to the charge on the ions.

• oxidation number of halogen is usually -1.

• oxidation number of atoms in the polyatomic ion is equal to the sum of the charge on the ion.

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