Balancing Reactions and Mole to Mole Conversions

2 MgO → 2 Mg + 1 O₂ Using the balanced equation provided. How many moles of magnesium oxide (MgO) would you need to produce 3 moles of oxygen (O₂)?

• 3 mols MgO

• 6 mols MgO

• 2 mols MgO

• 4 mols MgO

2 C₆H₁₄ + 19O₂ → 12 CO₂ + 14 H₂O Using the balanced equation provided. How many moles of oxygen (O₂) would you need to produce 6 moles of carbon dioxide (CO₂)?

• 9.5 mols CO₂

• 6.5 mols CO₂

• 19 mols CO₂

• 12 mols CO₂

2 C₆H₁₄ + 19 O₂ → 12 CO₂ + 14 H₂O Using the balanced equation provided. How many moles of water (H₂O) would be produced if you had 4.5 moles of hexane (C₆H₁₄)?

• 63 mols H₂O

• 14.5 mols H₂O

• 31.5 mols H₂O

• 19 mols H₂O

Determine if the following reaction is balanced. ___MgO → __2_Mg + ___ O₂

• yes

• No

What part of the equation (which formula) is incorrectly balanced? ___MgO → __2__Mg + ___ O₂

• MgO
• Mg
• O₂

The following equation has been incorrectly balanced. Select the formula(s) that have the wrong coefficient in front of them. ___2_ Al + __1__ O₂ → __2__ Al₂O₃

• Al
• O₂
• Al₂O₃

Balance this equation:

P₄+O₂  -->  P₂O₃

• 3 P₄+ O₂ --> 2 P₂O₃

• P₄+ O₂ --> 2 P₂O₃

• P₄+ 2 O₂ --> 3 P₂O₃

• P₄+ 3 O₂ --> 2 P₂O₃

Balance this equation Zn + HCl -->_ZnCl₂ +_H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

N₂ + 3H₂ → 2NH₃

What is the mole ratio between Nitrogen and Ammonium in the above reaction?

answer choices

• 1 moles NH₃/2 moles N₂

• 2 moles NH₃/1 moles N₂

• 2 moles N₂/3 moles NH₃

• 2 moles N₂/3 moles NH₃

Choose the correct coefficients for the following reaction: ____ Al + ____ S₂ → ____ Al₂S₃

• 2, 1, 2
• 4, 3, 2
• 1, 2, 2
• 2, 3, 2