1 / 10

Ch. 2 and 3 Measurement

Ch. 2 and 3 Measurement. Law of conservation of mass SI units density. Chemical Symbols. When writing the chemical symbol for an element, the first letter is always capitalized, and the second letter (if there is one) is always lower case. Chemical Equations. Reactants  Products

clinton-mcneil
Download Presentation

Ch. 2 and 3 Measurement

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ch. 2 and 3 Measurement Law of conservation of mass SI units density

  2. Chemical Symbols • When writing the chemical symbol for an element, the first letter is always capitalized, and the second letter (if there is one) is always lower case.

  3. Chemical Equations • Reactants  Products • Reactants are what goes into the reaction •  means yields or produces • Products are what result from a chemical reaction

  4. Law of Conservation of Mass • Mass of reactants equals the mass of the products, because mass cannot be created or destroyed by chemical reactions (only nuclear reactions) • Ex. If 25 grams of aluminum react with 5 grams of oxygen, how many grams of aluminum oxide are produced?

  5. SI Units Symbol Base Unit Abbrev. Quantity Length l meter m Mass m kilogram kg Volume v cm3 cubic centimeter Temp T kelvin K

  6. mega- kilo- k M 106 103 deci- d 10-1 centi- c 10-2 milli- m 10-3 micro-  10-6 nano- n 10-9 pico- p 10-12 Selected Prefixes for Metric Units Prefix Symbol Factor 100 - - - BASE UNIT

  7. Density The ratio between the object’s mass and its volume.

  8. Density • Density = • Density is a characteristic (physical) property that depends only on the composition of a substance, not on the size of the sample. • The composition of a mixture can vary therefore the density can vary. Mass Volume M V D =

  9. Density Mass (g) Volume (cm3)

  10. A copper penny has a mass of 3.1g and a volume of 0.35 cm3. What is the density of copper? Density = mass volume Density = 3.1g 0.35 cm3 Density practice problem = 8.8571 g/cm3 = 8.9 g/cm3

More Related