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Ch.2 Definitons
Chem. Defs.
Question | Answer |
---|---|
Weight | A measure of the gravitational pull on matter. |
Volume | The amount of space occupied by an object. |
Density | The ratio of mass to volume, or mass divided by volume. |
Accuracy | The closeness of measurements to the correct or accepted value of the quantity measured. |
Precision | The closeness of a set of measurements of the same quantity made in the same way. |
Percentage Error | Calculated by subtracting the accepted value from the experimental value, dividing the difference by the accepted value, and then multiplying by 100. |
Significant Figures | Consists of all the digits known with certainty plus one final digit, which is somewhat certain or is estimated. |
Scientific Notation | Numbers are written in the form M * 10n, where the factor M is greater than or equal to 1 but less than 10 and n is a whole number. |