Chem 121 In-class assignment #5
Names _________________________________________________________________
Oxidation – Reduction (Redox) Reactions
Balance each Redox reaction below, and then write the oxidation equation and the
reduction equation.
1.
____ Al2O3(s)  ____Al (s) + ____O2
Oxidation equation:
Reduction equation:
2.
____ Ba(s) + _____AgNO3  ____Ag (s) + ____Ba(NO3)2
Oxidation equation:
Reduction equation:
Mole Conversions
1. Write the following in terms of moles:
(a) 6.02 * 1023 donuts
(b) 35 * 1024 nitrogen atoms
(c) 36.0 g C
(d) 19.5 g K
(e) 54.0 g H2O
(f) The number of moles of Cl and 5.0 moles of MgCl2
2. Write the following in terms of grams:
(a) 6.0 moles arsenic, As
(b) 4.0 moles calcium carbonate, CaCO3
(c) 12.04 * 1023 calcium, Ca, atoms
Moles in Chemical Reactions
Nitrogen gas reacts with hydrogen gas to produce ammonia by the following equation:
____N2(g) + ____H2(g)  ____NH3(g)
1. Fill in the coefficients necessary to balance the above reaction.
2. Write the 3 mol:mol factors for this reaction:
3. If you have 1.50 moles of H2, how many grams of NH3 can be produced?
4. How many grams of H2 are needed to react with 3.00 g N2?
5. How many grams of NH3 can be produced from 15.0 g H2?