Goals

=**__Objectives: __**=

**Lesson 1:**
At the end of the lesson, students should be able to 1 define and distinguish the terms //relative atomic mass//, //relative// //molecular mass// and //relative// //formula masses//, based on the 12C scale 2 calculate the percentage mass of an element in a compound when given appropriate information 

**Lesson 2:**
At the end of the lesson, students should be able to 1 define the term //mole// in terms of the Avogadro constant. 2 define molar mass. 3 determine the no of moles from the given mass and the molar mass of any substances.