Mole Ratio

What can be determined from a balanced chemical equation?

• mole ratio of any two substances in the reaction

• total energy released from the reaction

• electron configuration of all elements in the reaction

• sequence of events that lead to formation of products

Tags

NGSS.HS-PS1-7

Where are the numbers for a mole ratio found?

• They are part of the chemical formula.

• They are given in the problem.

• They are found using the periodic table.

• They are found as coefficients in the balanced chemical equation.

What is the mole ratio of magnesium to iron?

• 3 : 2

• 2 : 3

• 1 : 2

• 3 : 1

Tags

NGSS.HS-PS1-7

In the balanced equation 2HgO → 2Hg + O₂, what is the mole ratio of HgO to O₂?

• 2 : 2

• 1 : 1

• 2 : 1

• 1 : 2

Tags

NGSS.MS-PS1-5

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

• 3 : 2

• 3 : 4

• 4 : 3

• 2 : 3

Tags

NGSS.HS-PS1-7

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

• 384 mol H₂O

Tags

NGSS.HS-PS1-7

If 3.5 moles of oxygen gas are used up as ethane combusts completely, how many moles of carbon dioxide are produced?

• 0.5 mol CO₂

• 0.57 mol CO₂

• 2.0 mol CO₂

• 3.0 mol CO₂

• 3.5 mol CO₂

Tags

NGSS.HS-PS1-7

N₂ + 3H₂ --> 2NH₃
What is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

• 6.7

• 2.0

• 3.0

• 15.0

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

2Na + S -->Na₂S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?

• 1

• 2

• 0.5

• 4

Tags

NGSS.MS-PS1-5