David W. Oxtoby: Chemical

David W. Oxtoby is President of Pomona college. Explore interesting quotes on chemical.

David W. Oxtoby: 26 quotes 0 likes

“We point out that not every reactant is completely consumed in a chemical reaction, and that the limiting reactant determines the maximum theoretical yield; the percentage yield may be somewhat less.”

David W. Oxtoby

Principles of Modern Chemistry (7th ed., 2012), Ch. 2 : Chemical Formulas, Equations, and Reaction Yields

“The definite mass ratios involved in reactions suggested a convenient method for counting the number of atoms of each element participating in the reaction. These results, summarized as the laws of chemical combination, provided overwhelming, if indirect, evidence for the existence of atoms and molecules.”

David W. Oxtoby

Principles of Modern Chemistry (7th ed., 2012), Ch. 1 : The Atom in Modern Chemistry

Law

“Investigating chemical reactions can be greatly complicated and often obscured by the presence of extraneous materials. So, the first step, therefore, is to learn how to analyze and classify materials to ensure that you are working with pure substances before initiating any reactions.”

David W. Oxtoby

Principles of Modern Chemistry (7th ed., 2012), Ch. 1 : The Atom in Modern Chemistry

Learning

“Laboratory or industrial chemical reactions are carried out with quantities that range from milligrams to tons, so we must be able to relate the relative atomic mass scale to the macroscopic scales used in practice. The link between the two scales is provided by Avogadro’s number”

David W. Oxtoby

N<sub>A</sub>
Principles of Modern Chemistry (7th ed., 2012), Ch. 2 : Chemical Formulas, Equations, and Reaction Yields

“Chemical reasoning, as used both in applications and in basic research, resembles a detective story in which tangible clues lead to a mental picture of events never directly witnessed by the detective.”

David W. Oxtoby

Principles of Modern Chemistry (7th ed., 2012), Ch. 1 : The Atom in Modern Chemistry

“The conservation of matter in a chemical change is represented in a balanced chemical equation for that process. The study of the relationships between the numbers of reactant and product molecules is called stoichiometry. Stoichiometry is fundamental to all aspects of chemistry.”

David W. Oxtoby

Principles of Modern Chemistry (7th ed., 2012), Ch. 2 : Chemical Formulas, Equations, and Reaction Yields

Study , Change

“Chemists think in the highly visual nanoscopic world of atoms and molecules, but they work in the tangible world of macroscopic laboratory apparatus. These two approaches to the chemical sciences cannot be divorced.”

David W. Oxtoby

Principles of Modern Chemistry (7th ed., 2012), Ch. 1 : The Atom in Modern Chemistry

World , Thinking , Science