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1.   Balance these chemical equations:___ Fe + ___ O23___ H223___ Cl22___ CH4222

  1. à ___ Fe2O
  2. + ___ N à ___ NH
  3. + ___ KBr à ___ Br + ___ KCl
  4. + ___ O à ___ CO + ___ HO

1.   How many atoms are in a mole? How does the concept of a mole relate to the molarity of a solution? To the gram atomic weight of an atom? To the gram molecular weight of a compound?


1.   A solution has a pH of 2.0. A second solution has a pH of 11.0. What are the hydronium ion concentrations of each solution?


1.   For the following chemical equations, identify which parts are oxidized and which are reduced:

a. I2 + 2 Br -1 à 2 I-1 + Br2

b. Sn+2 + 2 Ag à Sn + 2 Ag+1

c. 2 H2S + 3 O2 à 2 H20 + 2 SO2


1.   Identify the acid-base behavior of each substance in these reactions:

a. H3O+ + Cl- ↔ H2O + HCl

b.H2PO4-1 + H2O ↔ H3O + HPO4-2

 

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Subject: Chemistry, Science
1.Balance these chemical equations: ___ Fe + ___ O 2 ___ Fe 2 O 3 ___ H 2 + ___ N 2 ___ NH 3 ___ Cl 2 + ___ KBr ___ Br 2 + ___ KCl ___ CH 4 + ___ O 2...
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