How many sig figs in 3

    • [PDF File]Significant Figure Rules

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      Example #2 - Round 3.78721 to three significant figures. Look at the fourth figure. It is 7, a number greater than 5, so you round the original number up to 3.79. Example #3 - Round 726.835 to five significant figures. Look at the sixth figure. It is a 5, so now you must look at the fifth figure also.

    • [PDF File]Uncertainties and Significant Figures

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      3. Zeros that do nothing but set the decimal point are not significant. Both 0.000098 and 0.98 contain two significant figures. 4. Zeros that aren’t needed to hold the decimal point are significant. For example, 4.00 has three significant figures. 5. Zeros that follow a number may be significant. B. Rule for Adding and Subtracting Significant ...

    • [PDF File]Significant Figures

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      402 (3 sig. figs.) 3.00674 (6 sig. figs.) 3. Leading zeros (zeros at the beginning of a number) are NOT significant. 0.103 (3 sig. figs.) 0.000002 (1 sig. fig.) 4. Trailing zeros (zeros at the end of the number): are significant if and only if there is a decimal point present in the number OR they carry overbars. are NOT significant otherwise ...

    • [PDF File]Rules for Reporting Significant Figures

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      The answer to contain the same number of sign. figs. as the least precise measurement used in the calculation. 72.5674 six sign. figs. x 3.34. three sign. figs (limiting term) 242.3751160 initial answer (must be rounded off to three sign. figs.) Final Answer = 2.42x102. Rules for addition/subtraction

    • [PDF File]Significant Figures

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      = 3.6946 Step 2: Addition - = 3.6946 + 117.25 = 120.9446 = 120.9 (Correct Answer) Note - Conversion Factors are considered to be “perfect” quantities and are not used to determine the number of sig figs / decimal places in the calculated answer. This number only has 2 Sig Figs, so the answer

    • [PDF File]Significant Figures A- Why Significant Figures? The final ...

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      calculations, the final answer must have as many sig figs as the measurement with the least number of sig figs. (22.4 L/mole, molar masses and 8.31 kPaL/kmole are all measurements.) 7. When using molar masses, use at least as many sig figs as there are in the other measurements in the problem. 8. Only apply rule number 6 in the last step.

    • [PDF File]A Short Guide to Significant Figures

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      3.07 mL has 3 significant figures. (3) Zeroes to the left of the first nonzero digits are not significant; such zeroes merely indicate the position of the decimal point: 0.001o C has only 1 significant figure, 0.012 g has 2 significant figures. (4) Zeroes to the right of a decimal point in a number are significant:

    • [PDF File]Significant Figures

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      3 (four significant figures) 0.567 = 5.67 × 10!2 (three significant figures) 0.005670 = 5.670 × 10!3 (four significant figures) The following (arbitrary) rule works for rounding off answers to the proper number of significant figures. If the extra digit is 6, 7, 8 or 9, round up. If it is 1, 2, 3 or 4, round down. If it is 5 round up if the

    • [PDF File]Rules for Significant Figures (sig figs, s.f.)

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      613 has three sig figs 123456 has six sig figs 2. Zeros located between non-zero digits are significant (they count) 5004 has four sig figs 602 has three sig figs 6000000000000002 has 16 sig figs! 3. Trailing zeros (those at the end) are significant only if the number contains a decimal point; otherwise they are insignificant (they don’t ...

    • [PDF File]CHM 130 Sig Fig Practice Problems

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      because they are exact numbers. Any such equality will not dictate the sig figs in your final answer. H. More examples: 1. 3340 ft x 1.2 ft = 4.0 x 103 ft2 The answer must have 2 sig dig cause of the 1.2 thus 4000 is incorrect because it only has 1 sig dig. 2. 88359 m2 / 3 m = 30,000 m The answer can only have 1 sig dig cause of the 3. 3.

    • [PDF File]SIGNIFICANT FIGURES - Chem21Labs

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      The mantissa is .021 and has 3 digits because 10.5 has 3 sig figs). NOTE: It is the number of digits , not the number of sig figs in the mantissa 7. For exponents, the number of sig figs is the same as the number of digits in the mantissa. For example 101.23 = 17 or 1.7 x 101. This has 2 sig figs because there are 2 digits in the mantissa (.23). 8.

    • [PDF File]Chapter 1 Lecture Notes Significant Figures and Calculations

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      a. 2 sig figs b. 3 sig figs c. 4 sig figs d. no correct answer • Addition/Subtraction: only as many digits to the right of the decimal point in the answer as the factor with the least digits to the right of the decimal point How many significant figures should be used in the answers below (assuming ...

    • [PDF File]3.2 Significant Figures and Scientific Notation

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      6.8 + 11.934 = 18.734 18.7 (3 sig figs) 3.24 m + 7.0 m Calculation Calculator says: Answer 10.24 m 10.2 m 100.0 g - 23.73 g 76.27 g 76.3 g 0.02 cm + 2.371 cm 2.391 cm 2.39 cm 713.1 L - 3.872 L 709.228 L 709.2 L 1818.2 lb + 3.37 lb 1821.57 lb 1821.6 lb 2.030 mL - 1.870 mL 0.16 mL 0.160 mL ...

    • [PDF File]Module 3 – Significant Figures

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      the end of a sentence, means 3 sig figs. These modules will use that convention as well. However, the best way to avoid this ambiguity in the number of significant figures is to use scientific notation. 4 x 102 has one sig fig; 4.00 x 102 has 3 sig figs.

    • [PDF File]Measurements, Significant Figures, and Unit Conversions

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      Hint: Answer should be rounded to 4 sig figs because 0.2450 m has 4 sig figs . 8 3. If a person weighs 68.2 kg, how many pounds (lbs) is that? Hint: Don’t forget to round to the correct number of significant figures. 4. If 1 inch = 2.54 cm, how many cm (centimeters) are there in 239 inches?

    • [PDF File]Significant Figures

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      Once you decide how many digits are significant, the rules for rounding off numbers are straightforward: ... Round the following #s to 4 sig. figs. 4965.03. 780,582. 1999.5. 0 is dropped, it is 5; Note you ...

    • [PDF File]Significant Figures (Significant Digits)

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      Solving long-hand identifies the sig figs, or TIP: the answer will always have the same number of sig figs as the measurement with the fewest total sig figs. For the computation (6.341 x 9.24) = ? The calculator gives me: 58.59084 The actual answer is 3 sig figs (due to the 9.24, as it has the least number of sig figs). Answer is 58.6

    • [PDF File]The Model

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      How many sig figs should each measurement have? A = _____ B = _____ C = _____ 5. Later in the class you will be asked to use an analytical balance that measures to the 0.0001 place. If you need 3 grams of a solid, what mass would you measure using the balance and how would you report your number? 6. Suppose you ...

    • [PDF File]Significant Figure Rules for logs - Laney College

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      The sig fig rule for this function is the opposite of the sig fig rule for logs. Let’s try some numbers: 102.890 = 776.25 102.891 = 778.04 102.892 = 779.83 Notice that the original numbers had 3 digits behind the decimal place. The results differ in the third place. 101.2 = 15.8 101.3 = 19.9 101.4 = 25.1

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