Review on Stoichiometry

CH₄ + 2O₂ --> 2H₂O + CO₂
What is the mass of CO₂ can be produced when 35g of O₂ reacts? 

• 1.09 g
• 24.1 g
• 28.2 g
• 44.0 g

Tags

NGSS.HS-PS1-7

N₂ + 3 H₂ → 2 NH₃

How many moles of NH₃ can be formed from 1.00 mole of H₂?

• 4.00 moles

• 0.333 moles

• 0.667moles

• 6.00 moles

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

The limiting reactant

• slows the reaction down
• is used up first
• is the reactant that is left over
• controls the speed of the reaction

1 Cheese + 2 Bread --> 1 Grilled cheese
How many grilled cheeses can you make with 26 slices of bread and 14 pieces of cheese?

• 14
• 13
• 26
• 7

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

• 6
• 2
• 3
• 1

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

• 1.16%
• 116%
• 85%
• 76%

A reaction was predicted to produce 32.4 grams of a compound. When the product was measured, there were only 26.1 grams made. What is the percent yield?

• 80.6%
• 6.3%
• 24.1%
• 58.5%

Tags

NGSS.HS-PS1-7

H₂ + Cl₂ → 2 HCl

Which is the limiting reactant if equal grams of H₂ and Cl₂ react? (if this is hard for you to imagine, make up a number for your grams and work the problem!)

• H₂

• Cl₂

• HCl

• Neither

Tags

NGSS.HS-PS1-7

N₂ + 3 H₂ → 2 NH₃

Which is the limiting reactant if equal moles of N₂ and H₂ react? (if this is hard for you to imagine, make up a number for moles and work the problems!)

• N₂

• H₂

• NH3

• Neither

Tags

NGSS.HS-PS1-7