Chapter 11: Stoichiometry

What is the conversion factor that allows you to convert between moles of one compound and moles of another compound?

• molar mass

• Avogadro's number

• stoichiometry

• mole ratio

Balance this equation:

_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1

• 2,1,2,1

• 1,2,1,2

• 2,2,1,2

Tags

NGSS.HS-PS1-7

Balance this equation:

_SeCl₆+_O₂>_SeO₂+_Cl₂

• 1,2,1,2

• 1,1,1,3

• 1,2,1,1

• 2,1,1,1

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂ and NH₃ in the above reaction?

• 1 moles NH₃ : 2 moles N₂

• 2 moles NH₃ : 1 moles N₂

• 2 moles NH₃ : 3 moles N₂

• 3 moles NH₃ : 2 moles N₂

Tags

NGSS.HS-PS1-7

P₄O₁₀ + 6 H₂O --> 4 H₃PO₄

What is the mole ratio of H₂O to H₃PO₄ in the chemical equation above?

• 6 moles H₂O : 4 moles H₃PO₄

• 4 moles H₂O : 6 moles H₃PO₄

• 1 mole H₂O : 3 moles H₃PO₄

• 3 moles H₂O : 1 moles H₃PO₄

Tags

NGSS.HS-PS1-7

4NH₃ + 5O₂-->4NO + 6H₂O

What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15 moles

• 18 moles

• 20 moles

• 24 moles

Tags

NGSS.HS-PS1-7

Cl₂ + 2KBr → Br₂ + 2KCl

How many grams of Br₂ can be produced from 356 g of KBr?

• 2.99 g Br₂

• 9.10 g Br₂

• 1.50 g Br₂

• 239 g Br₂

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

How many moles of iron can be made from 3 moles of Fe₂O₃?

• 6 moles Fe

• 4 moles Fe

• 2 moles Fe

• 1 moles Fe

What mass of O₂ is needed to completely react with 75.0 g of H₂?

2 H₂ + O₂ → 2 H₂O

• 18.6 g O₂

• 1184 g O₂

• 595 g O₂

• 2400 g O₂

Tags

NGSS.HS-PS1-7

The limiting reactant

• slows the reaction down

• is used up first

• is the reactant that is left over

• is the only reactant