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# Lesson Note on Chemistry SS1 Second Term

## SCHEME OF WORK

WEEK ONE:- {INTRODUCTION TO MOLE CONCEPT}

WEEK TWO:- {INTRODUCTION TO MOLE CONCEPT (CONT’D)}

WEEK THREE:- {CHEMICAL EQUATIONS}

WEEKS FOUR AND FIVE:- {LAWS OF CHEMICAL COMBINATION}

WEEKS SIX:- {CHEMICAL COMBINATIONS AND BONDING}

WEEK SEVEN:- {THE KINETIC THEORY OF MATTER}

WEEK EIGHT:- {GAS LAWS}

WEEK NINE:- {GAS LAWS II}

WEEK 10: AIR

# WEEK ONE:- {INTRODUCTION TO MOLE CONCEPT

OVERVIEW

1. Introduction to mole concept – Here, we will get to learn what the mole concept is all about, its definition and its relation to Avogadro’s number of particles.
2. Calculation of molar mass/relative molecular mass – We will gain an understanding of how to carry out calculations concerning molar mass/relative molecular mass.
3. Calculation in terms of the formula (n=m/M) – We will become proficient in finding the number of moles in a compound using the formula (n=m/M).

OBJECTIVES

Students should be able to;

1. Define the mole
2. Differentiate between relative atomic mass and relative molecular mass.
3. Calculate the molar mass of an element.

# WEEK TWO:- {INTRODUCTION TO MOLE CONCEPT (CONT’D)}

OVERVIEW

1. Calculation in terms of Avogadro’s constant – We will understand how to find the number of moles by using Avogadro’s number of particles.
2. Calculation in terms of relative molecular mass and molar volume – We will gain an understanding on how to calculate the number of moles when given relative molecular mass and the molar volume.
3. Percentage of an element in a compound – Here, we will become proficient in determining the percentage composition of elements in a compound.
4. Empirical and molecular formula – The empirical and molecular formula of a compound might not always be the same. Here, we will understand the difference between the two and how to solve calculations involving them. To learn more, click here.

# WEEK THREE:- {CHEMICAL EQUATIONS}

OVERVIEW:

1. Writing and balancing chemical equations – Chemical equations can be tricky sometimes but in this topic, we will become proficient in writing and balancing chemical equations.
2. Calculation from the chemical equation – Calculations on how to find the number of moles of a substance will be treated. To learn more, click here.

# WEEKS FOUR AND FIVE:- {LAWS OF CHEMICAL COMBINATION}

This week’s topic deals with how to state, illustrate and verify the laws of chemical combination.

1. Law of Conservation of Matter – Here, we will understand what this law is about and its significance in the balancing of chemical equations.
2. Law of Constant Composition or Definite Proportion – We will understand how the elements of pure samples of a particular chemical compound are combined in the same proportion by mass.
3. Law of Multiple Proportion – This law explains how elements combine in simple whole ratios to produce more than one compound.
4. Calculations Based on Chemical Laws – Here, we will become conversant with how to successfully solve questions based on these chemical laws. To learn more, click here.

# WEEK NINE:- {GAS LAWS II}

Week 10

Topic: Air

Air

The atmosphere surrounding the earth contains air. Air is a mixture of gases composed mainly of Nitrogen and Oxygen and small amounts of Carbon (IV) Oxide, noble gases and water vapour. Air is the general name for the mixture of gases that makes up the Earth’s atmosphere. Air around us is a mixture of many gases and dust particles. It is the clear gas in which living things live and breathe. It has an indefinite shape and volume. It has no color or smell. It has mass and weight. It is a matter as it has mass and weight. Air creates atmospheric pressure. There is no air in the vacuum of the cosmos.

Nitrogen 78%, Oxygen 21%, Noble gases 1%, Carbon dioxide 0.03%, water vapour and dust. To learn more, click here.

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