Topic: Chemistry
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Mole Calculations in Chemistry
Acknowledgement Learning and Teaching Simple mass-mole conversions; Avogadro constant Teaching calculations in chemistry - a few tips As a generalisation, the more a problem has the left hand characteristics the more straightforward it tends to be.
In school chemistry courses, as far as mole calculations are concerned, most problems have the left hand set of characteristics. It is clear what has to be calculated, complete information is given, and the answer, when found, will be unambiguous. Most of these problems can be solved using algorithms, i.e. standard methods which can be learned. Such a process is sometimes called closed problem solving and in this document such problems will be called calculations.
In section 1.1, standard methods, or algorithms , are mentioned as applying to quantitative chemistry calculations involving the mole. You may be excused for asking, 'What algorithms are these?' since although there are tried and tested methods for carrying out mole calculations they vary quite a bit from one calculation to the next and might not be thought of as algorithms in the normal sense.
A fair proportion of school chemistry students finds difficulty with mole calculations. One cause may be weakness in arithmetic, especially in handling ratio and proportion. Another cause of difficulty may lie in the number of different factors that have to be correctly assembled in a mole calculation in order to arrive at a correct answer.
Source: www.ltscotland.org.uk
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