Stoichiometry Review

Given the equation:

2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g)

When 2.00 moles of NaClO₃ react, how many grams of O₂ is produced?

• 56 g of O₂

• 96 g of O₂

• 64 g O₂

• 32 g O₂

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What numbers in a balanced equation do we use to determine mole ratios?

• Subscripts

• Superscripts

• Coefficients

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

• 1,1,1,1
• 1,2,1,1
• 2,1,1,2
• 2,1,2,1

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___KNO₃ → ___KNO₂ + ___O₂

What coefficients are needed to balance the reaction?

• 2, 2, 1

• 2, 3, 2

• 1, 2, 2

• 1, 3, 1

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Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe
• 6 moles Fe
• 9 moles Fe
• 2 moles Fe

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2 NaClO₃ (s) → 2NaCl (s) +3 O₂ (g)

How many grams of O₂ will be produced from 12.00 moles of NaClO₃?

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

• 32 g O₂

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2Na + 2H₂O → 2NaOH+ H₂

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

• 5.27 g

• 2.6 g

• 690 g

• 45 g

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2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

• 13

• 8.8

• 0.99

• 1.0

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2CO  +  O₂  −-> 2CO₂
How many liters of carbon dioxide are produced from 10L of carbon monoxide?

• 10
• 20
• 1
• 5

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2H₂ + O₂ → 2H₂O

How many grams of H₂O can be produced from 3.91 g of O₂?

• 1.905

• 4.4

• 2.2

• 1.1

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NGSS.HS-PS1-7