The Mole Concept
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| Moles Ahead! |
If working on your own leaves you still slightly confused about what the mole is and how to use it, you absolutely need to get tutoring help before going on with the rest of chemistry.
The website, www.chemistryexplained.com starts its discussion about the mole by stating
"In chemistry the mole is a fundamental unit in the Système International d'Unités, the SI system, and it is used to measure the amount of substance. This quantity is sometimes referred to as the chemical amount. In Latin mole means a "massive heap" of material. It is convenient to think of a chemical mole as such.Visualizing a mole as a pile of particles, however, is just one way to understand this concept. A sample of a substance has a mass, volume (generally used with gases), and number of particles that is proportional to the chemical amount (measured in moles) of the sample. For example, one mole of oxygen gas (O 2 ) occupies a volume of 22.4 L at standard temperature and pressure (STP; 0°C and 1 atm), has a mass of 31.998 grams, and contains about 6.022 × 10 23 molecules of oxygen. Measuring one of these quantities allows the calculation of the others and this is frequently done in stoichiometry.The mole is to the amount of substance (or chemical amount) as the gram is to mass. Like other units of the SI system, prefixes can be used with the mole, so it is permissible to refer to 0.001 mol as 1 mmol just as 0.001 g is equivalent to 1 mg."
Read more: http://www.chemistryexplained.com/Ma-Na/Mole-Concept.html#ixzz5LSho6Krn
ACTIVITY ASSIGNMENT:
1. Watch each of the following videos, writing a summary of each one using your own words to capture the essential concept of each video.
2. Using your book, your written summary from the videos and Google, complete10.2 Sections 10.1 of Chapter 10, Chemical Quantities, in the Guided Reading and Study Workbook.
Chemical Quantities (Overview)
The Mole: a Measurement Of Matter
Mole-Mass and Mole-Volume Relationships
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