Mole Ratios and Mole to Mole Calculations

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

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

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

• 6

• 2

• 3

• 1

How many moles of water can be produced if 6.5 moles H₂ are used?

• 4 moles

• 6.5 moles

• 16 moles

• 2 moles

Tags

NGSS.HS-PS1-7

Given the reaction: 4Al + 3O₂ --> 2Al₂O₃ How many moles of Aluminum oxide, Al₂O₃, can you produce if you have 2 moles of Al?

• 3 mole

• 2 mole

• 1 mole

• 0.5 mole

Tags

NGSS.HS-PS1-7

3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio

• 3:1:3:2

• 3:1:3:1

• 1:5:3:2

• 3:1:1:2

Tags

NGSS.HS-PS1-7

2 C₈H₁₈ + 25 O₂ → 18 H₂O + 16 CO₂

How many moles of water would be produced by burning (reacting) 8.15 moles of octance, C₈H₁₈, with oxygen from the air?

• 73.4 moles

• 16.3 moles

• 147 moles

• 18.0 moles

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

• Ratio

• write down all substances

• add all together

• adjust the mole amounts

How many moles of S₈ is needed to produce 12 moles of SO₃?

• 1

• 1.5

• 2

• 12

Tags

NGSS.HS-PS1-7

How many moles of KCl is produced when 6.75 moles of O₂ is also produced?

• 2

• 3.5

• 4.5

• 6.75

Tags

NGSS.HS-PS1-7

CaCl₂ + 2Na --> 2NaCl + Ca With 2.2 moles of CaCl2, how much Ca can be produced? and how much NaCl can be produced?

• 8 Ca and .2 NaCl

• 4.8 Ca and NaCl

• 2.2 Ca and 4.4 NaCl

• 2 Ca and 9 NaCl

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7