M3_1-student - Unit 1 How do we distinguish substances?...

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Chemistry XXI Unit 1 How do we distinguish substances? Module 3: Comparing Masses Central goal: To apply the particulate model of matter to determine the relative mass of different particles, as well as the number of particles present in any given sample of a substance.
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Chemistry XXI The Challenge Analysis How much? The particulate model of matter has proven to be a very powerful tool to analyze the properties and behavior of chemical substances. Water Carbon dioxide How can we use it to differentiate substances in terms of quantitative properties? How can use it to quantify the amount of any substance present in a sample?
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Chemistry XXI If, according to our model, the identity, properties, and behavior of a substance are determined by the nature of its “ particles ”…. Then, we should focus our efforts on characterizing the properties of these particles. Butane What is its mass? What is its composition? What is its structure? Focus on Particles
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Atoms and molecules have masses and sizes so small that can not be measured directly. Let′s think!
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M3_1-student - Unit 1 How do we distinguish substances?...

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