One Step Stoichiometry

C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O. 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

How many moles of ethane (C₂H₆) are required to produce 13.5 moles of water from the above reaction?

• 4.5 mol C₂H₆

• 27 mol C₂H₆

• 40.5 mol C₂H₆

• 81 mol C₂H₆

• 162 mol C₂H₆

Which mole ratio tells how much aluminum oxide is produced from 3 moles of aluminum?

• 3 mol Al/ 2 mol Al₂O₃

• 2 mol Al₂O₃/ 4 mol Al

• 4 mol Al/ 2 mol Al₂O₃

• 2 mol Al₂O₃/ 3 mol Al

Tags

NGSS.HS-PS1-7

What is the mole ratio of Mg to MgCl₂?

Mg_(s) + HCl_(aq) → MgCl_2(aq) + H_2(g)

• 2 mol Mg/ 1 mol MgCl₂

• 1 mol Mg/ 2 mol MgCl₂

• 1 mol Mg/ 1 mol MgCl₂

• 2 mol Mg/ 2 mol MgCl₂

Mg_(s) + HCl_(aq) →MgCl_2(aq) + H_2(g)

The reaction of 2.5 mol of HCl will produce ______ mol of MgCl_2.

• 2.5

• 1.25

• 5.0

• 1.0

Tags

NGSS.HS-PS1-7

If there are 2 moles of oxygen available, which mole ratio will tells how much water is produced?

• 4 mol H₂O/ 5 mol O₂

• 5 mol O₂/ 4 mol H₂O

• 2 mol O₂/ 4 mol H₂O

• 4 mol O₂/ 2 mol H₂O

Tags

NGSS.MS-PS1-5

If there are 10 moles of propane, C₃H₈, which mole ratio will tells how much oxygen is required for the reaction to take place?

• 1 mol C₃H₈/ 5 mol O₂

• 5 mol O₂/ 1 mol C₃H₈

• 5 mol O₂/ 10 mol C₃H₈

• 10 mol C₃H₈/ 5 mol O₂

N₂ + 3H₂ --> 2NH₃

How many moles of NH₃ is produced from 6 moles of N₂?

• 12 moles

• 3 moles

• 2 moles

• 1.5 moles

What is stoichiometry?

• The quantitative study of amounts of reactants used and products formed in a chemical reaction.

• The study of the speed of reactions by looking at the products formed.

• The quantitative study of amounts of products used and reactants formed in a chemical reaction.

• The study of types of reactions

Tags

NGSS.HS-PS1-7

The __________ in a balanced equation reveals the mole ratios of the substances involved.

• subscript

• coefficients

• superscript

• total number in each compound

Tags

NGSS.HS-PS1-7