tailieunhanh - A First Book in Algebra, by Wallace C. Boyden

Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, simple or seemingly pure substances found in nature can in fact be mixtures of chemical substances. For example, tap water may contain small amounts of dissolved sodium chloride and compounds containing iron,. | The Project Gutenberg EBook of A First Book in Algebra by Wallace C. Boyden This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at Title A First Book in Algebra Author Wallace C. Boyden Release Date August 27 2004 EBook 13309 Language English Character set encoding TeX START OF THIS PROJECT GUTENBERG EBOOK A FIRST BOOK IN ALGEBRA Produced by Dave Maddock Susan Skinner and the PG Distributed Proofreading Team. 2 A FIRST BOOK IN ALGEBRA BY WALLACE C. BOYDEN . SUB-MASTER OF THE BOSTON NORMAL SCHOOL .