Calculating Numbers of Molecules and Atoms from Mass
(a) How many glucose molecules are in 5.23 g of C6H12O6?
(b) How many oxygen atoms are in this sample?(a) How many nitric acid molecules are in 4.20 g of HNO3?(b) How many O atoms are in this sample?
1 General Chemistry 101-004 John McDuffie- 1/13/17 Highlight = Example Highlight = Important Concept Highlight = Key Term Chapter 1- Atoms 1.1 A Particulate View Of The World: Structure Determines Properties -All Matter is Composed of Particles - Matter- Anything that occupies space and has mass. - This concept was conceived in ancient Greece but became widely accepted 200 years ago. - Single atoms and molecules are too small to see with even the strongest optical m microscope. - Example: Water is composed of one oxygen atom and two hydrogen atoms. - Atoms- Basic particles that compose ordinary matter. - 91 different types of atom occur naturally. - Molecules- Atoms bound together in geometric arrangements. - The Structure of the Particles That Compose Matter Determines the Properties of Matter - Example: Water molecules are bent. - If water molecules were linear, they would have a lower boiling point and have w weaker attractions between each other. - It would most likely feel more like paint thinner or gasoline. - Sugar and salt would not dissolve easily in it. - Chemistry is the Science That Investigates the Properties of Matter by Examining the Atoms and Molecules That Compose it. 1.2 Classifying Matter: A Particulate View - We Classify Matter According to its State or According to its Composition - Su