Mole Ratio

What is the mole ratio of iron sulfide to oxygen gas?

• 4/7

• 7/4

• 2/7

• 7/2

Tags

NGSS.HS-PS1-7

Hg(OH)₂ + 2 H₃PO₄ → Hg₃(PO₄)₂ + 6 H₂O

What is the mole ratio of Hg₃(PO₄)₂ to H₃PO₄?

• 1 to 2

• 2 to 1

• 2 to 3

• 3 to 2

Hg(OH)₂ + 2 H₃PO₄ → Hg₃(PO₄)₂ + 6 H₂O

What is the mole ratio of Hg(OH)₂ to Hg₃(PO₄)₂ ?

• 1 to 2

• 2 to 1

• 3 to 1

• 1 to 3

Tags

NGSS.HS-PS1-7

How are mole ratios used in chemical calculations?

• to convert between moles of different substances

• to convert between mass units of the same substance

• to convert from mass to volume of different substances

Tags

NGSS.HS-PS1-7

How many moles of iron are needed to react with oxygen to produce 2 moles of iron(III) oxide in this equation?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

What is the mole ratio of oxygen to iron(III) oxide?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-7

How many moles of phosphine (PH₃) are produced when 1 mole of phosphorus reacts with 6 moles of hydrogen?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

What part of a balanced chemical equation gives information about the number of moles?

• the subscripts

• the chemical symbol

• the mass

• the coefficients

N₂ +  3H₂ → 2NH₃ 
What is the mole ratio between Nitrogen and Ammonia 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 

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.