CHEM 107 Study Guide - Comprehensive Midterm Guide: Scale Of Temperature, Decimal Mark, Nail Polish
Document Summary
Measurements involve numbers regardless of high-tech or low-tech data collection methods. Used to represent very large or very small numbers as powers of 10. Move the decimal a certain number of digits left or right of the original number. The measuring device used determines the number of significant digits possible and therefore, the measurement"s certainty. It is best to use scientific notation to clarify. 9. 2 x 6. 8 x 0. 3744 = 23. 4225 reduced to 23 because we can only have. They do not limit the number of significant digits in a calculation. A conversion factor is a ratio of equivalent quantities used to express a quantity in different units. 1 i/5280ft = in 1 mile, there are 5280 feet or one mile per 5280 feet. 5280 ft/ 1 mi = in 5280 feet, there is one mile. A conversion factor is chosen and set up so that all units cancel except those required for the answer.
