Stoichiometry Review

What is the first thing you must do to solve a stoichiometry problem?

• Make sure the chemical reaction is Balanced

• Panic

• Make sure the Equation is Unbalanced

• Multiple by Avogadro's Number

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NGSS.HS-PS1-7

How many moles of H₂ are needed to react with 2 moles of N₂ according to the reaction?

1 N₂ + 3 H₂ → 2 NH₃

• 6

• 2

• 3

• 1

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NGSS.HS-PS1-7

How many moles of H₂O can be produced if 8 moles of H₂ are reacted according to the following reaction?

2 H₂ + 1 O₂ → 2 H₂O

• 4 moles

• 8 moles

• 16 moles

• 2 moles

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NGSS.HS-PS1-7

If 12.00 moles of NaClO₃ react, how many moles of O₂ will be produced according to the reaction?

2 NaClO₃ → 2 NaCl + 3 O₂

• 12 moles of O₂

• 18 moles of O₂

• 9 moles of O₂

• 6 moles of O₂

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NGSS.HS-PS1-7

1 Cl₂ + 2 KBr → 1 Br₂ + 2 KCl

How many GRAMS of KCl can be produced from 356 g of KBr?

• 749 g

• 223 g

• 479 g

• 814 g

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NGSS.HS-PS1-7

About how many GRAMS of H₂O will be produced from 150 grams of Fe₂O₃ according to the reaction?

1 Fe₂O₃ + 3 H₂ → 2 Fe + 3 H₂O

• 50 grams H₂O

• 60 grams H₂O

• 5000 grams H₂O

• 6000 grams H₂O

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NGSS.HS-PS1-7

How many LITERS of CO₂ are produced from the combustion of 110 g of CH₄ according to the reaction?

1 CH₄ + 2 O₂ → 1 CO₂ + 2 H₂O

• 306.9 Liters

• 61.6 Liters

• 136.9 Liters

• 153.4 Liters

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NGSS.HS-PS1-7

2Na + 2H₂O → 2NaOH+ H₂

How many grams of H₂ are produced if 120 g of Na are available?

• 5.2 g

• 2.6 g

• 690 g

• 45 g

Tags

NGSS.HS-PS1-7

What is a Limiting Reactant?

• the amount you end with

• the chemical you run out of first

• the unreacted chemical you have left over

• the amount you start with

What is an Excess Reactant?

• the amount you end with

• the chemical you run out of first

• the unreacted chemical you have left over

• the amount you start with