Stoichiometry Quiz

In the equation 2 Al₂O₃ → 4 Al + 3 O₂, what is the mole ratio of Al to O₂?

• 10 mol Al/ 6 mol O₂

• 3 mol Al/ 2 mol O₂

• 4 mol Al/ 3 mol O₂

• 2 mol Al / 3 mol O₂

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112.43.c.9.C

In the reaction 2 H₂ + O₂ → 2 H₂O what is the mole ratio of O₂ to H₂O

• 1 mol O₂ / 2 mol H₂O

• 2 mol O₂/ 4 mol H₂O

• 3 mol O₂/ 4 mol H₂O

• 4 mol O₂/ 3 mol H₂O

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112.43.c.9.C

• moles of N₂

• moles of H₂

• molar mass of H₂

• molar mass of N₂

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112.43.c.9.C

• moles of H₂

• molar mass of H₂

• molar mass of N₂

• moles of N₂

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112.43.c.9.C

• 2

• 32

• 90

• 3

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112.43.c.9.C

• 3

• 96

• 90

• 2

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112.43.c.9.C

• 2

• 160

• 238

• 1

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112.43.c.9.C

• 1

• 160

• 238

• 2

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112.43.c.9.C

Balance the following equation:

_C₅H₁₂ + _O₂ → _CO₂ + _H₂O

• 6

• 8

• 1

• 5

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112.43.c.9.A

2 K₃PO₄ + 3 BaCl₂ → 1 Ba₃(PO₄)₂ + 6 KCl

How many moles of KCl are produced from 4.5 moles BaCl₂?

​ (a)   BaCl₂ ÷ ​​ (b)   BaCl₂ × ​​ (c)   KCl= ​ (d)   KCl

• 4.5 moles
• 3 moles
• 6 moles
• 9 moles
• 2 moles

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112.43.c.9.C