[Chem1] Spring Final - Unit 10 Stoichiometry

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

How many step will it take for me to go from moles given to moles unknown?

• 1

• 2

• 3

• 4

How many steps will it take me to go from grams to grams?

• 4

• 3

• 2

• 1

How many step will it take for me to go from grams to moles unknown

• 1

• 2

• 3

• 4

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

• Write a Balanced Equation
• Panic
• Write an Unbalanced Equation
• Ask for help

2NaClO₃ (s) → 2NaCl (s) + 3O₂ (g)  
12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂
• 576 g of O₂
• 288 g O₂

Cl₂ + 2KBr → Br₂ + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

• 749 g
• 223 g
• 479 g
• 814 g

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O
About how many grams of H₂O will be produced from 150 grams of Fe₂O₃? 

• 50 grams H₂O
• 60 grams H₂O
• 5000 grams H₂O
• 6000 grams H₂O

Given the following reaction, 2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)  12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂
• 576 g of O₂
• 288 g O₂

N₂ +  3H₂ −->  2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6
• 2
• 3
• 1