Download Chemistry by John A. Olmsted, Gregory M. Williams PDF

By John A. Olmsted, Gregory M. Williams

Olmsted/Burk Chemistry, moment Canadian Edition is an introductory common chemistry textual content designed particularly with Canadian teachers and scholars in brain. Canadian content material within the kind of SI devices, IUPAC criteria and examine content material extra effectively displays the self-discipline of Canadian chemistry, distinguishing this article from present textual content choices that are basically American.
Canadian chemistry teachers will locate this article sufficiently rigorous whereas nonetheless enticing and keeping scholar curiosity with obtainable language, a concise and easy-to-use presentation of data, and a transparent problem-solving program—without an far more than fabric that makes such a lot texts look daunting and redundant. This moment version comprises extra natural chemistry assurance, multi-concept difficulties, and elevated scholar pedagogy.

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Additional resources for Chemistry

Example text

A subscript number after an element’s symbol denotes how many atoms of that element are present in the molecule. The subscript 2 in the formula for water indicates that each molecule contains two hydrogen atoms. No subscript is used when only one atom of an element is present, as is the case for the oxygen atom in a water molecule. Molecules always contain whole numbers of atoms, and so the subscripts in chemical formulas of molecular substances are always integers. Molecules vary considerably in complexity.

9 °C falls within the precision ranges of all three measurements, so all three are correct to within their stated limits of precision. Whereas precision describes the exactness of a measurement, accuracy describes how close a measurement is to the true value. Figure 1-8 illustrates the difference between precision and accuracy. An expert archer shoots arrows with high precision, with all the arrows hitting the target near the same spot (a and b). Under calm conditions, the expert is also quite accurate, shooting all the arrows into the bull’s-eye (a).

D) is an imprecise pattern with one accurate shot. 3 | Chemical Problem Solving Zeros can present a problem when determining the precision of a numerical value. This is because zeros are needed both to locate the decimal point and to express precision. From the statement that the Sun is 150 000 000 km from the Earth, we cannot tell whether the measurement is precise to nine significant figures or whether the zeros are there only to put the decimal point in the right place. Scientific notation eliminates this ambiguity because a power of 10 locates the decimal point, leaving us free to indicate the precision by the number of digits.

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