Stoichiometry Practice

Balance the following reaction:
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)

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

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

Balance the following reaction:  
C₂H₂(g) + O₂(g) --> CO₂(g) + H₂O(g)

• 4,10,2,1
• 2,5,4,2
• 1,2,2,1
• 4,10,2,2

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H₂O --> __NaOH + __H₂

• 2,2 --> 2,1
• 4,4 --> 4,1
• 1,2 --> 2,4
• 1,2 --> 2,1

Tags

NGSS.HS-PS1-7

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe₂O₃--> __Fe + __CO₂

• 3,1 --> 2,3
• 3,2 --> 1,1
• 3,2 --> 2,4
• 3,2 --> 2,1

Tags

NGSS.HS-PS1-7

Which of the following represent a mole ratio between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

• 2 mol AgNO₃ / 2 mol Ag
• 2 mol Ag / 2 mol AgNO₃ 
• 2 mol AgNO₃ / 2 mol Cu(NO₃)₂
• 2 mol AgNO₃ / 1 mol Cu(NO₃)₂

4NH₃ + 5O₂-->4NO + 6H₂O
What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15
• 18
• 20
• 24

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

New problem: If 16 moles of carbon dioxide are formed by this reaction, how many moles of water were also produced?

• 4 mol H₂O

• 6 mol H₂O

• 24 mol H₂O

• 96 mol H₂O

For the following reaction, how many moles of silver is produced, if 10 moles of silver nitrate is completely reacted during the reaction?
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

• 2 moles
• 2.5 moles
• 5 moles
• 10 moles

N₂ + 3H₂ --> 2NH₃
How many moles of N₂ is needed to react with 6 moles of H₂?

• 6.7
• 2.0
• 3.0
• 15.0