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Use the 10 mL graduated cylinder, which will be accurate to two significant figures. Mathematical operations are carried out using all the digits given and then rounding the final result to the correct number of significant figures to obtain a reasonable answer.
- Units of Measurement
Learning Objectives. To identify the basic units of...
- Dimensional Analysis
Imagine that a chemist wants to measure out 0.214 mL of...
- Uncertainty
Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...
- Accuracy
Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...
- Units of Measurement
CHEMISTRY 11 – EXPERIMENTAL UNCERTAINTY OF APPARATUS WORKSHEET. (1) Record the values for the experimental uncertainty encountered in using the following apparatus: Apparatus. Difference between numbered divisions. # of unnumbered subdivisions between numbered divisions.
Learning Objectives. By the end of this section, you will be able to: Define accuracy and precision. Distinguish exact and uncertain numbers. Correctly represent uncertainty in quantities using significant figures. Apply proper rounding rules to computed quantities.
29 sie 2023 · Uncertainties in Measurements. All measurements have a degree of uncertainty regardless of precision and accuracy. This is caused by two factors, the limitation of the measuring instrument (systematic error) and the skill of the experimenter making the measurements (random error).
If you look at a 10mL graduated cylinder, for example, the smallest graduation is tenth of a milliliter (0.1mL). That means when you read the volume, you can estimate to the hundredths place (0.01mL). Use the bottom of the meniscus to determine the volume in the 10mL graduated cylinder.
To measure the volume of liquid in this graduated cylinder, you must mentally subdivide the distance between the 21 and 22 mL marks into tenths of a milliliter, and then make a reading (estimate) at the bottom of the meniscus. Refer to the illustration in Figure 1.
To measure the volume of liquid in this graduated cylinder, you must mentally subdivide the distance between the 21 and 22 mL marks into tenths of a milliliter, and then make a reading (estimate) at the bottom of the meniscus. Refer to the illustration in Figure 1.
