Stoichiometry quiz

Balance the following reaction :
 
CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)

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

Tags

NGSS.HS-PS1-7

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

Tags

NGSS.HS-PS1-7

What is Avogadro's Number?

• 602,000
• 23 x 10⁶
• 10 x 10²³
• 6.02 x 10²³

How many moles is 4 grams of Calcium?

• 0.10 moles
• 10 moles
• 44 moles
• 160 moles

In the equation 2 Al₂O₃ --> 4 Al + 3 O₂, what is the mole ratio of aluminum to oxygen?

• 10:6 
• 3:4
• 4:3
• 2:3

Tags

NGSS.HS-PS1-7

How many moles of KOH are required to make 3.0 moles  of K₂SO_4?
H₂SO_{4  +}  2KOH -----> 2H₂O  +  K₂SO₄

• 3 mol KOH 
• 6 mol KOH 
• 18 mol KOH 
• 24 mol KOH 

Balance this equation
Zn+HCl-->ZnCl₂ +H₂

• Zn+HCl-->2ZnCl₂ +H₂
• Zn+HCl-->ZnCl₂ +2H₂
• Zn+2HCl-->ZnCl₂ +H₂
• 2Zn+HCl-->ZnCl₂ +H₂

Stoichiometry is based on the law of conservation of

• charge
• mass
• reactants
• volume

Tags

NGSS.HS-PS1-7

What is stoichiometry?

• The study of how the quantities of reactants and products are related in chemical reactions
• The study of the speed of reactions
• The study of how chemical reactions occur
• The study of types of reactions

N₂ +  3H₂ → 2NH₃ 
What is the mole ratio between Nitrogen and Ammonia in the above reaction?

• 1 moles NH₃ / 2 moles N₂ 
• 2 moles NH₃ / 1 moles N₂ 
• 2 moles N₂ / 3 moles NH₃ 
• 1 moles N₂ / 3 moles NH₃