How would you represent iron sulfide with particles? What evidence do you have? Are other combinations possible?

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Mixtures and Pure Substances

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Presentation transcript:

How would you represent iron sulfide with particles? What evidence do you have? Are other combinations possible?

Separation & Formation of Water Send an electric current through it Provide energy

Relating to Pure Substances Provides evidence for our definition that elements are only made of one kind of atom; cannot be broken down (separated) any further Whereas some pure substances (compounds) such as water, can be broken down in simpler substances

Gay-Lussac The water demo was an example that provided Gay-Lussac with evidence for his “combining volumes” idea: Gay-Lussac’s Law of Combining Gas Volumes:  Volumes of gases in a chemical reaction are present in the ratio of small integers (T & P constant) 2H 2 (g) + 1 O 2 (g) 2H 2 O (g) Ratio? 2:1:2 So if 50 L of hydrogen gas reacted with 25 L of oxygen gas, how much water vapor would be produced?

Example Compounds

Avogadro