Mole to Mole Ratios

WO₃ + H₂ --> W + H₂O
What coefficient goes in front of H₂?

• 1

• 2

• 3

• 4

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

• Avogadro's Number

I use mole ratio (coefficients) from balanced chemical equation as a conversion factor to convert amounts of moles of one compound to another.

• True

• False

Select the correct molar ratio taken from this balanced equation:

• 1 mol Al = 1 mol Al₂O₃

• 4 Al = 2 Al₂O₃

• 4 mol Al = 2 mol Al₂O₃

• 4 mol Al = 2 mol Al

Tags

NGSS.HS-PS1-7

What is the mole ratio of H₂O to H₃PO₄ in the equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4

• 4:6

• 1:3

• 3:1

Tags

NGSS.HS-PS1-7

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe

• 2 mol Mg/ 3 mol Fe

• 1 mol Fe/ 2 mol Fe

• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7

What is the mole ratio in the following reaction:
2CO  +  O₂  → 2CO₂

• 2:1:2

• 1:1:1

• 1:2:1

• Have no clue what a mole ratios is!!

Tags

NGSS.HS-PS1-7

How many moles of hydrogen gas are needed to react completely with 2.0 moles of nitrogen gas? What is the mole ratio of hydrogen gas to nitrogen gas?

• 1:3

• 3:1

• 1:2

• 2:1

How many step will it take for me to go from moles given to moles unknown?

• 1

• 2

• 3

• 4

2H₂  +   O₂  →  2H₂O
How many moles of oxygen are consumed if 8 moles H₂ are used?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-7