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[DOC File]Worksheet - Calculations
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UNIT 1 NOTES: Scientific Notation, Significant Figures & Rounding, Metric Units (Chapter 3 in your Chemistry Text) Scientific Notation. When scientists talk about very large or very small numbers, it gets difficult to name the number (e.g. a one followed by 15 zeros is quadrillion or quintillion?) and it’s painstaking to write them down.
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Find the number of significant digits in the following:
You should start counting with the first nonzero digit you find. Thereafter, all digits, including zero, are significant. ANOTHER WAY . 1. Digits other than zero are always significant. 2. One or more final zeros used after the decimal point are always significant. 3. Zeros between two other significant digits are always significant. 4.
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[DOC File]SIGNIFICANT DIGITS/FIGURES
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Practice Problems for Significant Figures . RULE -1: If the decimal is . Present: Find the first non zero on the left, then count all digits to the . RIGHT. If the decimal is . Absent: Find the first non zero on the right, then count all digits to the . LEFT. RULE-2: Every digit in scientific notation is Significant
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Experiment #1 – Measurements
Significant Figures - the number of significant figures (sig. fig.) is a measure of the degree of . uncertainty . in a measurement. There is experimental uncertainty in the last significant figure of a measurement. The rules for sig. fig. are given in Chapter 1.5. All non-zero numbers are significant. Zeros between numbers are …
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[DOC File]CHAPTER 1
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--Round the following numbers to A) 1 B) 2 C) 3 significant figures. 15. 0.6824 A) B) C) 16. 12.84 A) B) C) 17. 4162.7 A) B) C) Scientific Notation Worksheet. Convert the following numbers into scientific notation: 1) 3,400 _____ 2) 0.000023 _____ ...
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Determining Significant Figures
When adding and subtracting values, find the smallest decimal place that all values have in common and are significant and that is the last significant decimal place in your answer. Add the values like normal and round to the significant decimal place. For example, 5.23 (significant to hundredths place) + 3.484 (significant to thousandths place)
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[DOCX File]Practice Worksheet for Significant Figures
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Significant Figures and Metric Conversions. Significant figures are important in describing the accuracy and reliability of a measurement. The following rules, which you should have covered in lecture, will help you determine the number of significant figures in a measurement. 1. All nonzero digits are significant. 3.467 cm has 4 sig figs
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[DOC File]Rules for Using Significant Figures in Mathematical Operations
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Honors Chemistry – Significant Figures. Provide the best, complete, detailed, yet concise answers to the following. Find the number of significant digits in the following: PROBLEM ANSWER. 1. 0.025 L _____ 2. 54,000 m _____ 3.
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[DOC File]Significant Figures Practice Worksheet
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State the number of significant digits in each measurement. 1) 280,400 m 2) 2.84 km 3) 5.029 m 4) 0.003068 m 5) 4.6 x 105 m 6) 4.06 x 10-5 m
significant figures rules and examples

[DOC File]UNIT 1 Notes: Scientific Notation, Significant Figures ...
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Note that exact numbers have no effect on the number of significant figures you should report in the answer to a calculation. The number of significant figures in a calculation result will depend only on the numbers of significant figures in quantities having uncertainties. Scientific notation greatly simplifies chemical calculation.
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How to find significant figures in numbers