Mole to Mole Exit

Mole Ratios used for conversions are derived from:

• the molar mass of the reactants in the balanced chemical equation

• the coefficients of the balanced chemical equation

• the subscripts of the products in the balanced chemical equation

• the group number of each element in the balanced chemical equation

What are the missing coefficients for the unbalanced equation below?

AlPO₄ + Ba(OH)₂ → Al(OH)₃ + Ba₃(PO₄)₂

• 1,3,2,3

• 2,3,2,3

• 3,2,3,1

• 2,3,2,1

What is the mole ratio of Mg to MgCl₂?

Mg_(s) + HCl_(aq) → MgCl_2(aq) + H_2(g)

• 2 mol Mg/ 1 mol MgCl₂

• 1 mol Mg/ 2 mol MgCl₂

• 1 mol Mg/ 1 mol MgCl₂

• 2 mol Mg/ 2 mol MgCl₂

If there are 2 moles of oxygen available, which mole ratio would be used to determine how much water is produced?

C₃H₈ +5O₂ → 3CO₂ + 4H₂O

• 4 mol H₂O/ 5 mol O₂

• 5 mol O₂/ 4 mol H₂O

• 2 mol O₂/ 4 mol H₂O

• 4 mol O₂/ 2 mol H₂O

If there are 10 moles of propane, C₃H₈, which mole ratio would be used to determine how much oxygen is required for the reaction to take place?

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

• 1 mol C₃H₈/ 5 mol O₂

• 5 mol O₂/ 1 mol C₃H₈

• 5 mol O₂/ 10 mol C₃H₈

• 10 mol C₃H₈/ 5 mol O₂

• 2:4

• 1:1

• 2:1

• 1:2

Tags

NGSS.HS-PS1-7

• 4:5

• 1:1

• 2:3

• 4:4

N₂ +  3H₂ → 2NH₃ 
What is the mole ratio between Nitrogen and Ammonium in the above reaction?

• 1 moles NH₃ / 2 moles N₂ 
• 2 moles NH₃ / 1 moles N₂ 
• 2 moles N₂ / 3 moles NH₃ 
• 1 moles N₂ / 3 moles NH₃ 

Tags

NGSS.HS-PS1-7

In the equation 2 Al2O3 --> 4 Al + 3 O2, what is the mole ratio of aluminum to oxygen?

• 10:6 
• 3:4
• 4:3
• 2:3

Tags

NGSS.HS-PS1-7

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

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