gathering and reporting quantitative data Flashcards
refers to the measurements of a particular characteristic, variable, which may be classified as quantitavie or qualitative
Data
Values are assigned to a descriptive category
Qualitative
Values are described on a numerical scale.
Quantitative
may be independent or dependent
Variable
The degree of agreement between the measured value and the true value. It is also limited by the precision of the instrument being used
accuracy
of sig figs.
- 20.0000
- 3.50 x 10²
- 0.20450
- 0.00034
- 3:00 pm
- 55000
7.8100 - 10 x 10³
- 6295857291
10.0.000047203732
- 6
- 3
- 5
- 2
- none
- 2
7.2 - 1
- 10
- 8
signifies the smallest quantity that the instrument could be sensitive to or is able to detect.
Precision
Formula for Precision
= Smallest Calibration/2
Formula in getting the Smallest calibration
= difference between any 2 scales/No. of divisions
A convenient way of expressing very large and very small numbers
Scientific Notation
determine the precision
1. 10 mL graduated cylinder
2. 100 mL graduated cylinder
3. thermometer
- 0.01 mL
- 0.1 mL
- 0.1 °C
Who invented the bunsen burner
Robert Bunsen
Main purpose of Bunsen Burner
to obtain a combustible gas-air mixture that yields hot, efficient flame
the Gas used as fuel for the Bunsen burner
Natural Gas (chiefly Methane CH4)
what do u call combustion where enough amount of oxygen goes through the burner
Complete combustion
