Introduction to Stoichiometry

Mole ratios are obtained from the

• balanced chemical equation

• periodic table

• molar mass

What can be determined from a balanced chemical equation?

• Mole ratio of any two substances in the reaction

• Energy released in the reaction.

• Electron configuration of all elements in the reaction.

• Mechanism involved in the reaction.

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

In the chemical equation below, Na is the symbol for sodium

• 4

• How many sodium atoms are on the left side?

• 4

• How many sodium atoms are on the left side

• 2

• How many hydrogen atoms are on the right side?

• 2

• How many hydrogen atoms are on the left side?

Tags

NGSS.HS-PS1-7

A number written in front of a chemical formula is called a(n)

• subscript

• superscript

• yield

• coefficient

The blue numbers in the image below represent ________

• I don't know, and don't want to try

• coefficients

• subscripts

• none of the answers are correct

H₂O
This number tells how many molecules are in a chemical equation.

• coefficient

• subscript

• compound

• element

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles

• 8 moles

• 16 moles

• 2 moles

Tags

NGSS.HS-PS1-7

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