Stoichiometric Calculations

For the following balanced chemical equation

2K + F₂ --> 2KF

how many moles of KF are present?

• 2 mol of KF

• 1 mol KF

Tags

NGSS.HS-PS1-7

6.0 mol of aluminium reacts with oxygen to form aluminium oxide. What is the amount of oxygen, in mol, needed for complete reaction?

4Al(s) + 3O₂(g) → 2Al₂O₃(s)

• 1.5

• 3.0

• 4.5

• 6.0

Tags

NGSS.HS-PS1-7

For the following balanced chemical equation

2Al(s) + 6HCl(l) → 2AlCl₃(s) + 3H₂(g)

how many moles of H₂ are present?

• 1 mol

• 2 mol

• 3 mol

• 4 mol

• 6 mol

Tags

NGSS.HS-PS1-7

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

• 5.2 g
• 2.6 g
• 690 g
• 45 g

Tags

NGSS.HS-PS1-7

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-7

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