Chapter E Flashcards
What is chemistry?
Chemistry is the study of composition, structure, and properties of matter and of the reactions by which one from of matter may be produced from or converted into other forms.
What is the difference between matter and mass?
Matter: anything that has volume (occupies space), has mass
Mass: measure of amount of matter that makes up an object
True or false:
Mass is the same as weight
False. Mass is not the same as weight.
What is the conversion for Fahrenheit?
F=9/5 (•C) + 32
What is the conversation for kelvin?
K=(•C) + 273
What is dimensional analysis? What is sought?
Dimensional analysis is converting units with conversion factors
Unit sought=unit given x conversion factor (a fraction with units that cancel)
What are the prefix multipliers
in notebook/other cards
What are derived units?
Combination of units are summarized by a new unit (newtons, pascals, joules)
What do derived units do?
They convert between units that have different bases (example: 1 cm^3= 1 millimeter)
What is scientific notation?
Expresses numbers as a multiple of 10, move decimal left or right so number is between .00 and 9.99
What are intensive and extensive properties? Examples?
Intensive: properties that are independent of how much of the substance is present (color, temp, etc)
Extensive: properties that are dependent on the amount of substance present (mass, volume, size)
What is the difference between precision and accuracy?
Precision: reproducibility of data
Accuracy: the degree to which data agrees with the “true” value
