Which of the following statements is correct? In a calculation that involves addition and subtraction the final answer should have the same number of significant figures as the measurement with the fewest significant figures the final answer should have the same number of significant figures as the measurement with the most decimal places the final answer should have the same number of significant figures as the measurement with the fewest decimal places the final answer should have the same decimal places as the measurement with the fewest decimal places the final answer should have the same number of significant figures as the measurement with the most significant figures the final answer should have the same decimal places as the measurement with the most decimal places

Which of the following statements is correct? In a calculation that involves addition and subtraction the final answer should have the same number of significant figures as the measurement with the fewest significant figures the final answer should have the same number of significant figures as the measurement with the most decimal places the final answer should have the same number of significant figures as the measurement with the fewest decimal places the final answer should have the same decimal places as the measurement with the fewest decimal places the final answer should have the same number of significant figures as the measurement with the most significant figures the final answer should have the same decimal places as the measurement with the most decimal places

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter3: Matter

Section: Chapter Questions

Problem 7CR

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Which of the following are CORRECT regarding significant figures? In your answer, please list the numbers designating statements that are CORRECT. 1) when multiplying or dividing numbers, the result only has as many significant figures as the factor with the fewest significant figures- the purpose of significant figures is to indicate accuracy of a measured quantity 2) when adding or subtracting numbers, the result only has as many significant figures as the factor with the fewest significant figures 3) when adding or subtracting numbers, the result only has as many decimal places as that of the factor with the fewest decimal places 4) the purpose of significant figures is to indicate the precision of a measured quantity 5) countable quantities impact the number of significant figures in a calculation 6) when multiplying or dividing numbers, the result only has as many decimal places as that of the factor with the fewest decimal places
The correct answer for the addition of 6.5 g + 2.16 g + 1.411 g + 3 g is a) 14.071 g b) 14.0 g Oc) 13 g d) 10 g e) 13.1 g
I am told that when determining the number of significant figures, if the decimal place is absent, then you start counting from the first nonzero number on the right side and continue counting to the left until you reach the last digit. However, if the decimal place is present, start counting the first nonzero number from the left and continue counting to the right until the final digit has been reached. For example, the number 50 only has two significant figures, while the number 50.00 has four significant figures. However, how does the number 50 have two significant figures? If I have to start countingfrom the right because of the absence of a decimal place, and I have to begin with the first non zero number, I would have to start from 5 and there is nowhere to count further to the left. How does the number 50 have two significant figures?
A Moving to another question will save this response. Question 21 Make the following calculation and report your answer to the correct number of significant figures rounding the result if necessary. (8.811 +3.1379)/48.61 meaning add 8.811 to 3.1379 and then divide by 48.61 A Moving to another question will save this response. 2 W #3 20 E F3 54 4 DOD DOD F4 R % 5 F5 MacBook Pro T & Y 7 *00
Which of the following will have 1 decimal place in the correct answer? O 145 cm + 76.9 cm O 1.23 cm + 14.8 cm O 0.49 cm +0.72 cm O 5.26 cm + 7.456 cm
Multiplication and division When multiplying or dividing, the final answer is rounded to the same number of significant figures as the measured number with the fewest significant figures. Addition and subtraction When adding or subtracting, the final answer is rounded to the same number of digits to the right of the decimal point as the measured number with the fewest digits to the right of the decimal point. Part A Compute 2.345 × 4.48697. Round the answer appropriately. Express your answer numerically using the proper number of significant figures. Part B Compute 1240.64 / 64. Round the answer appropriately. Express your answer numerically using the proper number of significant figures. Part C Compute 21405.6 + 9.3456 . Round the answer appropriately. Express your answer numerically using the proper number of significant figures.
between significant digits are always significant. figures. Example: 5,007 has 4 significant figures. 3) Trailing zeros in a number are significant only If the number contalns a decimal polnt. Example: 100.0 has 4 significant figures. 100 has 1 significant figure. 4) Zeros in the beginning of a number whose only function Is to place the decimal polnt 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. 0.47000 has 5 signlficant figures. Determine the number of significant figures in the following numbers. 1. 0.02 6. 5,000. 4. 2. 0.020 2. 7. 6,051.006 3. 501 3 8. 0.0005 1. 4. 501.0 9. 0.1020 5. 5,000 10. 10,001 5 Determine the location of the last significant place value by placing a bar over the digit. Example: 1.700) 9,010.0 4.7x10-8 10,8 00,000 3.0Tx 1021 0.00410 1. 8040 6. 90,100 0.0300 699.5 2,000X162 0.90100 2. 0.0300 7. 4.7 x 108 3. 699.5 8. 10,800,000. 3.…
SC Q A Z Question 4 Consider this formula. F1 2 = X = :: If z = 4.0 and y = 9.2, what is the value of x? Express your answer to the tenths place (i.e., one digit after the decimal point). 2.3 Y X 2 Question 5 30 F2 W S X H 3 20 F3 E D C 54 000 000 F4 R F % 5 V F5 T G MacBook Air B F6 Y 7 H AA F7 U N 8 J DII F8 M K F9 O F10 L P
Find the difference between the value of x2 and the sum of x1 plus x3.; let x4 be equivalent to the sum of x1 and x3 and let x5 be the difference between x2 and x5. This calculation scheme is shown below. Make notes about any similarities or differences between the values in your notes. x4 = x1 + x3 x5 = x2 – x4 Data Analyis This section will include all data collected during the lab. Thermochemical Data Tinitial (°C) Tfinal (°C) ΔT (°C) moles NaOH qreaction (kJ) ΔHrxn Reaction 1 25.0 30.3 +5.3 0.025 -1.11 -44.4 Reaction 2 25.0 37.0 +12.0 0.025 -2.51 -100.4 Reaction 3 25.0 31.7 +6.7 0.025 -1.40 -56.1 Reaction 1: NaOH(s) → Na+(aq) + OH-(aq) + x1 kJ 1g /39.977g/mol = 0.025 moles Moles NaOH = 0.025 qsolution = (4.184 J/g °C) (50.0g) (30.3°C -25.0°C) = -1108.76 J/ 1000 qreaction (kJ) = -1.11 kJ ΔH = -1.11 kJ/ 0.025 moles ΔHrxn = -44.4 kJ/mol…
Numbers which are not the results of measurements are not considered significant figures. True or False
1. Perform the following calculations and give the answer rounded to the correct number of significant figures: [(3.35 x 1.06) + (21 1.773)] The answer is
Which choice best describes the degree of uncertainty in the measurement 16.30 g? O The uncertainty cannot be determined without additional information. The quantity is exact. +1.00 g +0.01 g ±0.10 g

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