Concept explainers
The chapter sections to review are shown in parentheses at the end of each problem.
In which of the following pairs do both numbers contain the same number of significant figures? (2.2)
To determine: The pairs of numbers that contain the same number of significant figures
Answer to Problem 83UTC
Solution:
c) 0.000 75 s and 75 000 s
d) 6.240 L and 6.240 × 10-2 L
Explanation of Solution
A number is significant if it is:
- Non-zero digit.
- Any zeros between two or more non-zero digits.
- Trailing zeroes in the decimal number.
Also, note that zero placed after a non-zero digit without any decimal is simply a place holder and insignificant. Therefore, as per the above rules one can write:
a)
Number | Significant Figures |
2.0500 m | 5 |
0.0205 m | 3 |
b)
Number | Significant Figures |
600.0 K | 4 |
60 K | 1 |
c)
Number | Significant Figures |
0.000 75 s | 2 |
75 000 s | 2 |
d)
Number | Significant Figures |
6.240 L | 4 |
6.240 × 10-2 L | 4 |
The pairs of numbers in (c) and (d) have the same significant figures.
Want to see more full solutions like this?
Chapter 2 Solutions
Basic Chemistry
- 1.48 Write each of the following in scientific notation: (1.5) a. 0.0042 b. 310 c. 890 000 000 d. 0.000 000 056 Iarrow_forwardA shipping box has a length of 7.00 in., a width of 6.00 in., anda height of 4.00 in. (2.3)a. What is the length of the box, in centimeters?b. What is the width of the box, in centimeters?c. How many significant figures are in the width measurement?d. Calculate the volume of the box, in cubic centimeters, to thecorrect number of significant figures.arrow_forward(1.8)The area of a paper is 758 cm². What is the area of the paper in m²? O 7.58 x 104 m² O 7.58 x 102 m² O 0.0379 m² O 7.58 m²arrow_forward
- A cedarcrest.instructure.com と口 Page of 5 4. A patient who is pre-diabetic showed a level of 180. mg of glucose per 100. mL of blood, also known as a blood sugar level. If an average body contains about 11 pints of blood, how many grams of glucose are present in blood. (1 pint = 473.176473 mL) (2.5, 2.6) MacBook Proarrow_forwardEvaluate the following and express your answer in standard scientific notation. (3.5-10 2) (7.1210 4) (9.6z10) O 5.1x10-2 O 5.1x10-3 O 4.71x10-4 O 4.7x100arrow_forward(Q20) A balloon is filled to a volume of 774 mL with 555 milligrams of helium gas. Some of the helium gas is removed until the volume of the balloon is 263 mL. What is the total mass of helium (in mg) that remains in the balloon? (3 sf)arrow_forward
- A cedarcrest.instructure.com I Dow Page < of 5 5. What is the volume in mL of a 24 Karat gold egg that weighs 1.75 kg? The density of gold is 19.3 g/cm³. (2.5, 2.6, 2.7)arrow_forwardHow many significant figures does the following calculations yield? (12.2-0.2)/1.02arrow_forwardWhat is the value for x in the equation below? e(1.24x) = 412.8(9.07+9.21)arrow_forward
- ___RbNO3 +__ BeF2 = __Be(NO3 )2 + __RbF the coefficients are A. (1,2,1,2) B. (2,1,1,2) C. (2,3,2,1) D. (2,1,2,1) E. (2,1,3,2)arrow_forward(4.3)(0.267) (7.40)(30.0) Above is written as a fraction Express your answer using the correct number of significant figures.arrow_forwardPage 1 > of 5 3. The oil painting "Irises" by Vincent van Gogh measures 28 inches high by 37 inches wide. (2.3, 2.6) a. What is its height in centimeters (cm)? b. What is its width in centimeters (cm)? C. Calculate the area of the painting, in square centimeters and square inches, to the correct number of significant figures. (A = w * h)arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY