CHEM 101 Chapter Notes - Chapter 2: Decimal Mark, Trailing Zero, Metric System
2 Sep 2016
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Document Summary
Measurement: the determination of the dimensions, capacity, quantity, or extent of something. Most common measurements in chemical labs o: mass, volume. Quart gallon: metric system (used in scientific work) Metric system interrelationships are less complicated than the english unit interrelationships because the metric system is a decimal unit system. The meter(m) is the base unit of length in the metric system. The liter(l) is the base unit of volume in the metric system. A number whose value has no uncertainty associated with it. A number whose value has a degree of uncertainty associated with it. Inexact numbers result any time a measurement is made. The digits in a measurement that are known with certainty plus one digit that is estimated: guidelines. Trailing zeros are significant if a decimal point is present. Trailing zeros are not significant if a decimal point is not present. In the numerical value of a measurement specifies the measurement"s uncertainty.
