Significant digits and rounding
4.6: Significant Figures and Rounding - Chemistry LibreTexts
When are nonzero digits significant in a measurement? Always. A zero in a measurement is significant if it is . a trailing zero after the decimal point . or . it is a zero with a bar placed over it . or . it is a zero between significant digits. What is the difference between a counting number and a measurement?
[DOC File]Significant Digits Handout - University of Texas at Austin
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Thus in evaluating sin(kx), where k = 0.097 m-1 (two significant digits) and x = 4.73 m (three significant digits), the answer should have two significant digits. Note that whole numbers have essentially an unlimited number of significant digits. As an example, if a hair dryer uses 1.2 kW of power, then 2 identical hairdryers use 2.4 kW: 1.2 kW ...
[DOCX File]Rounding and Significant Digits
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Chemistry Name: Worksheet: Significant figures Date: A. Read pp. 56 - 62 and answer the following questions: 1. _____ (T/F) Significant figures include all the digits that can be known precisely and the last digit which must be estimated. 2. _____ (T/F) Significant figures are an indication of the precision of a measurement. 3.
[DOC File]Significant Digits - Miami-Dade County Public Schools
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How many significant figures are in each of the following numbers? 1) 5.40 ____ 6) 1.2 x 103 ____ 2) 210 ____ 7) 0.00120 ____ 3) 801.5 ____ 8) 0.0102 ____
[DOC File]Worksheet: Significant Digits & Rounding
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Express the following fractions in decimal from to 2 significant digits. a. ¼ b. 2/3. c. 5/3 d. 13/5. 6. A container holds 32.8 qt of water. The following portions of water are then added to the container: 0.12 qt, 3.7 qt, and 1.266 qt. ... Significant Figures and Rounding Measurements Name _____ ...
[DOC File]Significant Figures and Rounding Measurements Name
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Rounding and Significant Digits. What are significant digits? 3.14159 has six significant digits (all the numbers give you useful information) 1000 has one significant digit (you don't know anything for sure about the hundreds, tens, or units places; the zeroes may just be placeholders; they may have rounded something off to get this value)
[DOC File]Significant Figures Worksheet - Chemistry Geek
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each have three significant digits, and that’s what limits the number of significant digits in your answer. 0.0473. 907. But do not round yet! All rounding is done at the end of the calculation. Keep all the digits for now, but remember where the last significant digit falls. Next do the other multiplication: 6.842 × …
[DOC File]Rules for Determining Significant Figures in Measurements
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Rounding also comes into play when using sig figs; actually, it’s a main part of the idea. Generally, if the last digit of a number is 6 or greater, you round up (e.g. 3.14159 becomes 3.1416). If the last digit of a number is less than 5, you round down (e.g. 3.141 becomes 3.14).
[DOC File]Chemistry - North Thurston Public Schools
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Observe that while the digits in the thousands column are both the same, the values of the digits in the hundreds column vary. Therefore, the quotient would be 7,800 cm, to two significant figures. Note that the number of figures in the quotient is the same as the least number of …
[DOC File]SIGNIFICANT DIGITS
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You must round off your final answer to two significant figures: 21 m2. There are two rules to remember when rounding off numbers: If the first digit to be dropped is . 4 or less, it and the following digits are just dropped. Ex. Rounding off 5.3132 to 3 significant figures = 5.31. If the first digit to be dropped is . …
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