I need assistance with balancing this equations, oxidation # and moles to grams.

Question

I need assistance with balancing this equations, oxidation # and moles to grams.

4) Each of the following ions are isoelectronic (same number of electrons) as an inert(noble) gas, identify the inert gas in each case below; a) Ca *2 b) N3 c)H 5) Balance the following reactions: a) BaClhNa 2 SO4 b) Mg 2 c) MnO2 AlAl2Os d) KCIOs KCI 02 > NaCl Ba SO4 MgO Mn 6) Identify above reactions (in question # 5) as; single replacement, double replacement, synthesis, decomposition etc. a) c) 7) Assign the oxidation numbers to the element underlined a) MnO 2 Mn 8)- a) How many moles are in 12.0 grams of Na? b) d) Answer b) How many grams are in 2.00 moles of Cl2 molecules? Answer Page 2

Explanation / Answer

1. the ions given are

Ca+2 :

The atomic number of Ca = 20

So number of electrons in Ca+2 = 18

The nobel gas with atomic number 18 is : Argon

N-3:

Atomic number of nitrogen = 7

So number of electrons in N-3 : 10

The inert gas with atomic number 10 = Neon

H-1 : The atomic number of hydrogen = 1

so number of electrons in H-1 = 2

The atomic number of inert gas = 2 which is helium

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