Composition is not a variable in one-component systems. A two-component system possesses a single composition variable. In general, a C-component system is characterized by C-1 independent compositions.

Several measures of composition (or concentrations) are available. The most commonly used is the mole fraction, which for component i is defined by:

n n is the total moles in the system and ni is the number of moles of component i. By definition, the sum of the mole fractions is unity.. The mole fraction unit is used for gas mixtures, nonaqueous liquid solutions, and solid solutions. In aqueous solutions, these units are generally avoided in favor of volumetric units such as moles or mass of i per unit volume of solution.

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Getting Started With Solar

Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

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