Ws 2 precision in measures significant figures

Jul 17, 2014 · • 2. How many significant digits are in the following numbers: a. 0.1150 c. 11500 b. 10510 d. 10510. • Lesson: • Go over HW on Sig Figs • Notes- Scientific Notation (handout) • Practice Scientific Notation • Significant Figures- How precise Worksheet • HW: Finish practice

the following pdf files are the graphing WS Packet. reading_and_understanding_graphs.pdf: File Size: 88 kb: Download File
CHEMISTRY July 31, 2012
6.2.1. Analytical Worksheet ... number of significant figures indicated by the analytical method. If ... precision, specificity for the product being analyzed, and the estimated uncertainty of the ...
When doing math in chemistry you need to follow some rules to make sure that your sums differences products and quotients honestly reflect the amount of precision present in the original measurements. When multiplying or dividing numbers the result is rounded to the number of significant figures in the factor with the least significant figures.
Example: 100.0 has 4 significant figures. 100 has 1 signiflcant figure. 4) Zeros in the beginning of a number whose only function is to place the decimal point are not significant. Example: 0.0025 has 2 significant figures. 5) Zeros following a decimal significant figure are significant. Example: 0.000470 has 3 significant figures.
Least significant figures are still significant! In the number 0.004205 (which may be written as 4.205 x 10-3), the '5' is the least significant figure. In the number 43.120 (which may be written as 4.3210 x 10 1), the '0' is the least significant figure. If no decimal point is present, the rightmost non-zero digit is the least significant figure.
1.2.9 Calculate quantities and results of calculations to the appropriate number of significant figures. The number of significant figures in a result should mirror the precision of the input data. That is to say, when dividing and multiplying, the number of significant figures must not exceed that of the least precise value.
CHEMISTRY July 31, 2012
a. 3.40 cm b. 3.48 cm c. 2.48 cm d. 2.5 cm The diagram on page 27 represents a portion of a centimeter scale. Answer the following two questions about this diagram. 6. The greatest number of significant figures that should be reported when measuring with this scale is a. 1. b. 3. c. 5. d. 7. 7.
3.01×10 −2 centimeters has three significant figures (you only look at the "3.01" part, which has three) and is precise to the nearest 0.01 x 10 −2 centimeters (or 1 x 10 −4 centimeters). There are practice problems at the end of this tutorial, so if you still don't get it, don't worry about it too much.
Significant Figures An alternative method of regarding uncertainty. In any measurement, the number of significant figures is critical. The number of significant figures is the number of digits believed to be correct by the person doing the measuring. It includes one estimated (uncertain) digit. Rules for Working with Significant Figures: 1.
the following pdf files are the graphing WS Packet. reading_and_understanding_graphs.pdf: File Size: 88 kb: Download File