Precise? Accurate? Density= Measurement, Significant Figures, Rounding, 1. How many significant figures in each of the following measurements? 3.121 m 4 2 1.4 X 10 g. 2 0.051 L 2. Round the following numbers to 3 significant figures. 2.35500 230 9.385 9.59 (12.8 +12.71)/0.560 = 120 ft 45.55 Group A 12.348 g 12.441 g 12.367 g 12.392 g 2 3. Solve the following and express the answer in the correct number of significant figures. a. The average mass of 3 objects whose individual masses are 10.3 g, 9.334 g, 9.25 g. 10.39 + 9.334 + 9.25 + 3 = 28.884c, or 28.9 Group B 12.412 g 12.420 g 0.0150 L b. The volume of a metal block whose dimensions are 2.44 cm by 4.2 cm by 3.571 cm. 4.2.3.54= 36.60 2.440 12.418 g 12.415 g 200. K c. Carry out the following operations and express your answer in the correct number of significant figures. 3 155./(43.25 -7.1) = 4.288 4. our groups of students where charged with measuring the mass of 10.0 mL of a solutio of sugar water and from there to calculate the density. The actual mass of the 10.0 mL was 12.348 g. Given the data below, decide the precision and accuracy of each group. Use the best set of data to calculate the density. 3 Group C 12.321 g 12.366 g 12.389 g 12.314 g 0.005454.00545 Group D 12.349 g 12.346 g 12.347 g 12.350 g
Precise? Accurate? Density= Measurement, Significant Figures, Rounding, 1. How many significant figures in each of the following measurements? 3.121 m 4 2 1.4 X 10 g. 2 0.051 L 2. Round the following numbers to 3 significant figures. 2.35500 230 9.385 9.59 (12.8 +12.71)/0.560 = 120 ft 45.55 Group A 12.348 g 12.441 g 12.367 g 12.392 g 2 3. Solve the following and express the answer in the correct number of significant figures. a. The average mass of 3 objects whose individual masses are 10.3 g, 9.334 g, 9.25 g. 10.39 + 9.334 + 9.25 + 3 = 28.884c, or 28.9 Group B 12.412 g 12.420 g 0.0150 L b. The volume of a metal block whose dimensions are 2.44 cm by 4.2 cm by 3.571 cm. 4.2.3.54= 36.60 2.440 12.418 g 12.415 g 200. K c. Carry out the following operations and express your answer in the correct number of significant figures. 3 155./(43.25 -7.1) = 4.288 4. our groups of students where charged with measuring the mass of 10.0 mL of a solutio of sugar water and from there to calculate the density. The actual mass of the 10.0 mL was 12.348 g. Given the data below, decide the precision and accuracy of each group. Use the best set of data to calculate the density. 3 Group C 12.321 g 12.366 g 12.389 g 12.314 g 0.005454.00545 Group D 12.349 g 12.346 g 12.347 g 12.350 g
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Accurate?
Precise?
Density=
Measurement, Significant Figures, Rounding, Precision and Accuracy
1. How many significant figures in each of the following measurements?
3.121 m
4
2
1.4 X 104g.
2
0.051 L
120 ft
2. Round the following numbers to 3 significant figures.
2.35500 23
9.385 9.59
2
Group A
12.348 g
12.441 g
12.367 g
12.392 g
3. Solve the following and express the answer in the correct number of significant figures.
a. The average mass of 3 objects whose individual masses are 10.3 g, 9.334 g, 9.25 g.
10.39 + 9.334 + 9.25 +3= 28.8849, or
28.9
b. The volume of a metal block whose dimensions are 2.44 cm by 4.2 cm by 3.571 cm.
2.44 4.2.3.54= 36.60
Group B
12.412 g
12.420 g
12.418 g
12.415 g
0.0150 L 3
3
200. K
c. Carry out the following operations and express your answer in the correct number of
significant figures.
(12.8+ 12.71)/0.560 = 45.55
155./(43.25-7.1) = 4,288
4. Four groups of students where charged with measuring the mass of 10.0 mL of a solution
of sugar water and from there to calculate the density. The actual mass of the 10.0 mL was
12.348 g. Given the data below, decide the precision and accuracy of each group. Use the
best set of data to calculate the density.
0.005454.00545
Group C
12.321 g
12.366 g
12.389 g
12.314
g
11
Group D
12.349 g
12.346 g
12.347 g
12.350 g
11
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