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chem unit 6
chem midterm
Term | Definition |
---|---|
counting by weighing | a process to determine the number of things by measuring their mass |
average atomic mass | the mass of the average atom of an element |
amu | a unit of mass used to measure atoms |
molecular mass | the mass of 1 molecule of a substance |
mole | a unit to measure the number of atoms/molecules in a sample |
molar mass | the mass in grams of 1 mole of an element or compound |
percent composition | the percent by mass of each element in a compound |
molecular formula | the actual number of atoms of each element in the compound |
empirical formula | the smallest integer ratio of the elements in a compound |