She was a visiting scholar at Columbia University NY in and in and at Brooklyn College in , where she worked on research projects in the laboratory of Brian Gibney.
Her research focuses on the synthesis and study of porphyrin-based light harvesting compounds. She was the chair of the New York section of the American Chemical Society in , and she currently serves as councilor to the American Chemical Society.
A Very Brief History of Chemistry 1. Scientific Measurements 2. Elements, Compounds, and the Periodic Table 3. The Mole and Stoichiometry 4. Molecular View of Reactions in Aqueous Solutions 5. Oxidation Reduction Reactions 6. Energy and Chemical Change 7. The Quantum Mechanical Atom 8. The Basics of Chemical Bonding 9.
Theories of Bonding and Structure Properties of Gases Intermolecular Attractions and the Properties of Liquids and Solids Mixtures at the Molecular Level: Properties of Solutions Chemical Kinetics Chemical Equilibrium Acids and Bases, A Molecular Look Acid—Base Equilibria in Aqueous Solutions Solubility and Simultaneous Equilibria Thermodynamics Electrochemistry Nuclear Reactions and Their Role in Chemistry Metal Complexes Organic Compounds, Polymers, and Biochemicals.
The Team for Success authors are dedicated to ensuring that all of their Accounting titles are accessible to students, current, accurate, and have a consistent voice and pedagogy from introductory accounting to the intermediate level. Hear from our Authors. The physical state, gas, liquid, or solid, depends on temperature and pressure but not on the mass of the substance.
The melting point of 1. The density of 1. Thus, density is not dependent on the mass of substance. Surface area depends on the amount of substance. It also depends on the nature of the Substance. A bar of metal has a smaller surface area than that of the same bar ground Into fine particles. The melting points and boiling points of water at 1 atmosphere pressure. The digits that are significant figures in a quantity are those that are known measured with certainty plus the last digit, which contains some uncertainty.
The accuracy of a measured value is the closeness of that value to the true value of the quantity. The precision of a number of repeated measurements of the same quantity is the closeness of the measurements to one another.
To convert seconds to hours multiply by: 1h s To convert 3. Four significant figures would be correct because the conversion factor contains exact values.
The measured value determines the number of significant figures. We will do this using the mass of the water and its density. The mass of chloroform is determined in the same way that we determined the mass of water. The experimental density most closely matches the known density of methanol 0.
The density of ethanol is 0. Melting point and boiling point could also distinguish these two alcohols, but not color. Since the density closely matches the known value, we conclude that this is an authentic sample of ethylene glycol. Millions discover their favorite reads on issuu every month.
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