Stoichiometry

Stoichiometry

Moles and Mass Stoichiometry

Multiple Choice

The Formula to make S'mores is:

2C + 1M + G₂ → C₂MG₂. If you have 8 chocolate pieces, how many S'mores can you make?

• 5

• 4

• 8

• 42

Multiple Choice

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation
• Panic
• Write an Unbalanced Equation
• Ask for help

Multiple Choice

KNO₃ --> KNO₂ + O₂

What coefficients are needed to balance the reaction?

• 2, 2, 1

• 2, 3, 2

• 1, 2, 2

• 1, 3, 1

Multiple Choice

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

Multiple Choice

2H₂ + O₂ → 2H₂O

How many moles of oxygen are consumed if 8 moles H₂ are used?

• 2

• 4

• 6

• 8

Multiple Choice

2 KClO₃ → 2 KCl + 3 O₂

How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol

• 1.0 mol

• 10.1 mol

• 4.5 mol

Multiple Choice

CH₄ + 2 O₂ → CO₂ + 2 H₂O

How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

• 13.7 mol

• 2.75 mol

• 6.11 mol

• 6.85 mol

Multiple Choice

4 Al + 3 O₂ –> 2 Al₂O₃ How much aluminum would be needed to completely react with 45 grams of O₂?

• 1.05 moles

• 3.75 moles

• 1.875 grams

• 1.875 moles

Multiple Choice

SiO₂ + 3C → SiC + 2CO

I need 8 moles of SiC. How many grams of Carbon should I weigh?

• _{96 g}

• 288 g

• 2.67 g

• 48 g

Multiple Choice

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)

12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

Multiple Choice

2Na + 2H₂O → 2NaOH+ H₂

How many grams of hydrogen are produced if 120 g of Na are available?

• 5.2 g

• 2.6 g

• 690 g

• 45 g

Multiple Choice

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O

What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

• 13.8 g O₂

• 3.86 mol of O₂

• 124 g O₂