1a)  How many moles of chlorine gas (Cl₂) would react with 5 moles of sodium (Na)
       according to the following chemical equation? (Balance equation.)

        2Na + Cl₂ --> 2NaCl

        2.5 mol Cl₂
                               

1b)  Using the equation (after it is balanced) above, determine the amount of product that  
       can be produced  from 24.7 g Na.  

        62 g NaCl
                       

1c)  How many molecules of product would be produced from 24.7g Na?

      6.5 E23 NaCl  molecules

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2a)  In the reaction 2C₈H₁₈ + 25O₂ --> 16CO₂ + 18 H₂O, the ratio of volumes of O₂ to
       CO₂ is        25:16 
       

2b)  If 27.3g of C₈H₁₈ are combusted, what mass of water will be produced?

       37.8 g H₂O
                            

2c)  How many molecules of CO₂ will be produced?

       1.15 E24   molecules CO₂

2d)  How many atoms of H are in 2 mol of C₈H₁₈?

         2.2 E25 atoms  H

2e)  What is the percentage, by mass, of the H in 2 mol of C₈H₁₈?

        1.37 E26 amu  C₈H₁₈ 

        2.2 E25 amu H
                     

        16% H