Limiting Reactant WS Key and Work

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------~~------------------Limiti g Reactant WS
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1. Aluminum oxidizes according to the fOIl!wing equation: 4 Al
(8)
+ 3 Oz (g) 7 2 AlZ03 (8)
A. Powdered Al (3.95 g) is placed into a container containing 4.10 L of Oz. What is limiting reactant?
B. What mass of the excess reactant re ains?
C. What mass of .:
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2. Chlorine can replace bromine in bromide compounds forming a chloride compound and elemental
bromine. The following equation is an eramPle of the reaction:
Tc
2 KBr(aq) + C}z(aq) 72 KCl~aq) + Brz(l)
A. When O.855g of Cl2 and 3.205g of
i;ixed
in solution, which is the limiting reactant?
B. What mass of the excess reactant re ains?
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C. What mass of product will be forme ?
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3. In the commercial production of the ele ent arsenic, arsenic(III) oxide is heated with carbon, which
reduces the oxide to the metal accord in . to the following equation:
2 AsZ03
(8)
+3C
(8)
~3 CO2 (g) + 4 As
(8)
A. If 8.87 g of Asz03 reacts with 1.00 g of C, what is the limiting reagent?
B. What mass of the excess reactant remains?
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