Limiting Reagent Quiz

Appriximately how many grams of MgCl₂ will be produced when 6.00 g HCl combines with 5.00 g Mg?
a.  Mg +  2HCl --> MgCl₂ +  H₂   
b.  a.  Mg +  2HCl --> MgCl₂  +  H₂   

• 19.6 g
• 39.4 g
• 7.72 g
• 1.08 g

How many grams of water can be produced by the reaction of 2.4 mol C₂H₂ with 7.4 mol O₂?
a.   2C₂H₂ +  5O₂ -->  4CO₂  +  2H₂0
b.   2C₂H₂ +  5O₂ -->  4CO₂  +  2H₂0

• 43.2 g H2O
• 35.8 g H2O
• 17.8 g H2O
• None of the above

Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl₂.
a.  Mg +  2HCl --> MgCl₂  +  H₂   
b.  a.  Mg +  2HCl --> MgCl₂  +  H₂   

Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl2.

• Mg
• H2
• MgCl2
• HCl

Fe (s) + S (l) --> FeS (s)  

In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.
How much FeS is formed?

• 14.8 g
• 12.2 g
• 13.7 g
• 19.9 g