PT #005

Using the balanced equation in question 1,
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?

• 5.00 g
• 7.29
• 182 g
• 218 g

Using the balanced equation in question 1,
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
What is the mass in grams of H₂ gas when 4.0 moles of HCl is added to the reaction?

• 0.99 g
• 4.0 g
• 2.0 g
• 6.0 g

 Using the balanced equation in question 5, CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
how many grams of H₂O are needed if 3.20 moles of CaC₂ are consumed?

• 115 g
• 28.8 g
• 0.0889 g
• 6.40 g

Using the balanced equation in question 9,

C₂H₂(g) + O₂(g) --> CO₂(g) + H₂O(g)

How many moles of water (H₂O) are produced when 25.0 grams of C₂H₂ are consumed?

• 0.960 moles

• 0.480 moles

• 1.92 moles

• 3.84 moles

4 Al + 3 O₂ –> 2 Al₂O₃  How many moles of aluminum would be needed to completely react with 45.00 grams of O₂?

• 1.050 moles

• 3.750 moles

• 1.875 grams
• 1.875 moles

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe