Chemical reactions

Chemical reactions in nature and in living organisms

2.1. Writing chemical equations

2.2. Chemical formula and calculations

‪Reactants, Products and Leftovers‬

Balancing Chemical EquationsHow do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas!

2.3. Types of chemical reactions

QUIZ: Types of chemical reactions

Types of Chemical ReactionsCan you name the Types of Chemical Reactions?

See How Well You Can Identify Types of Chemical ReactionsHow well do you know your types of chemical reactions? Test your knowledge with this ten question multiple choice quiz.

2.4. Chemical formula and calculations

Mass percentage of elements

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Worksheet

mass percentage worksheet - копия.docx

Finding the chemical formula given percent

Calculating mass percent (worked example) (video) | Khan AcademyTo calculate the mass percent of an element in a compound, we divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100.

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