Micro-Scholarship, What it is, How can it help me.pdf
MOLE-RATIOS.pptxxhajwiwhekqowgajwigeyhehs
1.
2. LEARNING COMPETENCY
• Calculate the amount of substances used or produced in a
chemical reaction
OBJECTIVES:
At the end of the lesson, the learners should be able to:
• Define stoichiometry; and
• Determine the mole ratios from a balanced chemical
equation.
3. ESSENTIAL QUESTIONS
At the end of this lesson, the student
should be able to answer the following
questions.
• What is stoichiometry?
• What are mole ratios?
• How are mole ratios determined from a
balanced chemical equation?
4. What is mole?
• The mole is defined as the amount of substance which
has the same number of particles (atoms, molecules,
ions, or formula units) as the number of atoms present
in exactly 12 grams of the isotope carbon-12.
• It is the fundamental measuring unit in chemistry
• This unit used to count the chemical entities relative
to the mass of given standard.
• Its abbreviation is mol while its symbol is n.
5.
6. There are specific terms used to denote the
number of particles in a given distinct
chemical entity.
I. Atoms are used to denote the particles in
an element
II. Ions are used in charged particles
III. Formula units are used in ionic compounds
IV. Molecules are used in covalent compounds
7. Option A: Counting Moles and Number of
Particles
In this activity, the students are to determine the number of
particles or the number of moles present in the following
chemical entities.
Duration: approximately 5 minutes
Teacher’s Preparation:
• Print the table below as a worksheet for students. If not used
as a worksheet, draw the table on the board for the students
to copy on their notebooks.
