Stoichiometry 2
Solve the following:

1. What mass (in grams) of sodium oxide is produced by the reaction of 1.44 grams of sodium with
excess oxygen? __ Na + __ O₂ à __ Na₂O

2. What mass (in kg) of water will be given off when 19.2 kg of octane (C₈H₁₈) is burned completely in
air? __ C₈H₁₈ + __ O₂ à __ CO₂ + __ H₂O

3. How many grams of Al₂(SO₄)₃ are need to react with KCl in order to produce 12.45 grams of K₂SO₄?
__ Al₂(SO₄)₃ +    __ KCl à    __ AlCl₃ + __ K₂SO₄

4. Hydrogen gas can be produced through the following unbalanced reaction.
__ Mg  +    __ HCl à     __ MgCl₂  +    __ H₂
a. What mass of HCl is consumed by the reaction of 2.50 moles of magnesium?
   b. What mass of each product is produced in part a.? 

5. Acetylene gas, C₂H₂, used in welding, produces an extremely hot flame when it burns in pure oxygen
according to the following unbalanced reaction.
                        __ C₂H₂ +    __ O₂ à    __ CO₂ +    __ H₂O
How many grams of each product are produced when 2.50 x 10⁴ grams of C₂H₂ burn completely?

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