Summary Chemistry: Module 1 - The Central Science

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Module 1: The Central Science
Conversion Equations
Kelvin: K = °C+273

Fahrenheit: °F = (°C)1.8+32

Celsius: °C = (°F-32)/1.8




📏 Lesson 3: Uncertainty in Data
Accuracy and Precision
Accuracy = How close a measurement is to the accepted value

Precision = How close repeated measurements are to each other

Precise measurements can still be inaccurate!



Error and Percent Error
Experimental value: Measured during the experiment

Accepted value: True/correct value




Module 1: The Central Science 1

, Error:

Error = Experimental value - Accepted value

Always positive — only the size of the error matters.




Percent Error:

Scientists want to know what % of the accepted value the error represents.
Percent error: expresses error as a percentage of the accepted value

Percent Error = (Error ÷ Accepted Value) x 100




But to get % error in one go:




Module 1: The Central Science 2