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Practice ProblemBUILD
For each of the following numbers. determine the number of significant figures it contains, rewrite it without using scientific notation, and determine the number of significant figures in the result.
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Chemistry
- Perform the following calculations and report each answer with the correct number of significant figures. (a) 60.9 x 35 4.0 2100 (b) 0.144 +0.0070 + 0.011 4.0 X (c) 37 x 92 x 1.857 4.0 6400 (d) 16 4.0 (e) 8.63 x (f) 4.0 (h) 0.18 0.6410 4.0 180 + 7.40 + 0.013 0.0350 0.502 (g) 28.7 0.0483 4.0 4.0 (92.4 91.46) 44.70 X X Check the number of significant figures.arrow_forwardEvaluate each of the following mathematical expressions, and express the answer to the correct number of significant digits. (a) 45.3468 + 0.85 + 7.468 (b) 9.4458 + 3.7675 - 2.71 (c) 0.8294 + 0.217 + 4.96 (d) (7.611 + 9.81 + 3.6117) / 3.0arrow_forwardWrite numbers using scientific notation. (a) Write the following numbers in scientific notation using E-notation. Example: Enter 1.20E-4 for 1.20x10-4 Write each number to two decimal places with one non-zero digit before the decimal point. Example: Use 1.20E-4 NOT 0.120E-3 or 12.0E-5 (i) 0.0661 (ii) 3410 (b) Write the following numbers in standard notation. Do not include a decimal point for numbers greater than 1. Include a zero before the decimal point for numbers less than 1. (i) 3.13×104 31300 (ii) 1.13x10-4 31300 Check & Submit Answer Show Approacharrow_forward
- Express the results of the following additions and subtractions to the proper number of significant figures. All of thenumbers are measured quantities.(a) 67.314+8.63 - 243.198=(b) 4.31 +64 +7.19 =(c) 3.1256 × 1015 - 4.631 × 1013 =(d) 2.41 × 10-26 -7.83 × 10-25 =arrow_forwardCurrent Attempt in Progress A gold bullion dealer advertised a bar of pure gold for sale. The gold bar had a mass of 3320 g and measured 4.37 cm x 4.54 cm x 6.02 cm. Use this information to determine if the bar was pure gold. (a) The volume of the bar is cm and the mass of the bar is 3320 g, therefore, the density of the bar is equal to g/cm. (b) Was the bar pure gold? O yes Exit session hparrow_forwardCarry out the following operations and express the answers with the appropriate number of significant figures. (a) 14.3505 + 2.65 (b) 952.7 - 140.7389 (e) 13.29 × 104210.25012 (d) 0.0588/0.677arrow_forward
- Determine whether the zeros in each number are significant(A) 2050(B) 9.00 x 10^2(C) 0.0530(D) 0.075(E) 300.(F) 285.00arrow_forwardCalculate each of the following expressions, giving youranswers the proper numbers of significant figures.(a) log (3.56 × 104)(b) e-15.69(c) 108.41(d) ln (6.893 × 10-22)arrow_forwardPerform the following calculations and report each answer with the correct number of significant figures.(a) 628 × 342(b) (5.63 × 102) × (7.4 × 103)(c) (28.0)/(13.483)(d) 8119 × 0.000023(e) 14.98 + 27,340 + 84.7593(f) 42.7 + 0.259arrow_forward
- 1) A 1.728 in' of a substance has a mass of 36 grams. What is the density of the substance in g/cm'? (1 inch= 2.54 cm) (a) 21 (b) 5.6 (c) 30, (d) 14 (e) 1.3arrow_forwardFollowing AAS analysis, a graph of absorbance versus ppm nickel standard gave a best-fit line y = 0.0428x + 0.0487. Calculate the ppm nickel in the well water sample having an absorbance of 0.565. 13.08 O 12.06 9.88 9.78 Previous Nextarrow_forwardHow many significant figures are in each number?(a) 58.31 (b) 0.00250 (c) 2.7 * 103 (d) 1 cm = 0.01 m (e) 0.500 (f) 2100arrow_forward
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