Limiting and Excess Reactant

What is the limiting reactant if 15 moles of NH₃  react  with 16 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

• NH₃

• NO

• N₂

• water

To determine the limiting reactant in a chemical reaction, one must know the

• amount of product formed

• available amount of one of the reactants

• available amount of each of each reactant

• speed of the reaction

What is the limiting reactant when 20g CH₄ and 15g H₂O are combined?

• CH₄

• H₂O

• CO₂

• H₂

Tags

NGSS.HS-PS1-7

What is the limiting reactant if 16 moles of NH₃ and 30.0 moles of NO are combined? 4NH₃ + 6NO --> 5N₂ + 6H₂O

• NH₃

• NO

• N₂

• water

Tags

NGSS.HS-PS1-7

Fe + 3 S --> Fe₂S₃

If 7.62g Fe and 8.67g S are combined, what is the limiting reactant?

(Molar masses: Fe = 55.85 g/mol; S = 32.07 g/mol, Fe₂S₃ = 207.91 g/mol)

• Fe

• S

• FeS

• none

Tags

NGSS.HS-PS1-7

How much SOCl₂ is produced when 16.2g SO₂ are combined with 13.7g PCl_5? ? (Molar masses: SO₂ = 64.07 g/mol; PCl₅ = 208.22 g/mol, SOCl₂ = 118.97 g/mol)

• 7.83g

• 30.1g

• 26.4g

• 19.8g

Tags

NGSS.HS-PS1-7

CaCO₃ + 2FePO₄ --> Ca₃(PO₄)₂ + Fe₂(CO₃)₃ If 100. g of CaCO₃ is reacted with 45 g of FePO₄, what is the limiting reactant? (molar masses: CaCO₃ = 100.09 g/mol; FePO₄ = 150.82 g/mol; Ca₃(PO₄)₂ = 310.18 g/mol; Fe₂(CO₃)₃ = 291.73 g/mol)

• iron(III) carbonate, Fe₂(CO₃)₃

• calcium carbonate, CaCO₃

• iron(III) phosphate, FePO₄

• calcium phosphate, Ca₃(PO₄)₂

Tags

NGSS.HS-PS1-7

What is the maximum amount of each product that can be formed if 100. g CaCO₃ and 45.0 g FePO₄ are reacted?

• 103 g of calcium carbonate, 97.1 g of iron(III) phosphate

• 92.5 g of calcium phosphate, 87.0 g of iron(III) carbonate

• 310. g of calcium phosphate, 291 g of iron(III) carbonate

• 46.3 g of calcium phosphate, 43.5 g of iron(III) carbonate

Tags

NGSS.HS-PS1-7

• H_2

• O_2

• H_2O

• None

Tags

NGSS.HS-PS1-7

• C_2H_5OH

• O_2

• CO_2

• H_2O

Tags

NGSS.HS-PS1-7