Curriculum
Science — Second Preparatory
Unit 1: Matter and Energy
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Unit 2: Matter and Chemical Reactions
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Unit 3: Energy Flow in Photosynthesis and Respiration
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Unit 4: Geological Processes
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Text lesson
The Chemical Equation
The Chemical Equation
Lesson summary
Lesson summary
- A chemical equation is a symbolic statement of a reaction. Reactants are on the left of the arrow and products on the right.
- Subscripts do not change when balancing. Coefficients are the numbers that change.
- A balanced equation has the same number of atoms of each element on both sides, following the law of conservation of mass.
- A balanced equation can be used to calculate the masses of reactants and products.
The Chemical Equation · 7 / 7
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