Mole Ratio and Conversions

4NH₃ + 5O₂-->4NO + 6H₂O
What is the number of moles of H₂O produced when 12 mole of NH₃ is consumed? USE SCRATCH PAPER TO WORK OUT THE PROBLEM LIKE IN YOUR NOTES/HAND IN YOUR SCRATCH WHEN DONE WITH QUIZZIZ

• 15
• 18
• 20
• 24

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂ 
What is the number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

• 2.5
• 6
• 12
• 15

3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe
What is the Ratio of moles of Mg 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

Tags

NGSS.HS-PS1-7

Which of the following represent a mole ratio (FRACTION) between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

• 2 mol AgNO₃ / 2 mol Ag
• 2 mol Ag / 2 mol AgNO₃ 
• 2 mol AgNO₃ / 2 mol Cu(NO₃)₂
• 2 mol AgNO₃ / 1 mol Cu(NO₃)₂

Where are the numbers for a mole ratio found?

• They are part of the chemical formulas for the reactants / products.

• They are given in the problem.

• They are found on the periodic table for those elements.

• They are found as coefficients in the reaction's balanced chemical equation.

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?

• 
• 
• 
• 

What do the coefficients need to be in the following equation in order to be balanced?
_Mg + _Cl₂ → _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Tags

NGSS.HS-PS1-7

Balance this equation:
Al₂O₃ -> Al + O₂ 

• 2Al₂O₃ -> 2Al + 3O₂ 
• 2Al₂O₃ -> 4Al + 3O₂ 
• 3Al₂O₃ -> 2Al + O₂ 
• 2Al₂O₃ -> 3Al + 2O₂ 

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

problem: How many moles of ethane (C₂H₆) are required to produce 13.5 moles of water from the above reaction?

• 4.5 mol C₂H₆

• 27 mol C₂H₆

• 40.5 mol C₂H₆

• 81 mol C₂H₆

• 162 mol C₂H₆