Concept explainers
(a)
Interpretation : The number
Concept Introduction : A number can be changed to given significant figure either by round off or by addition of zero. The rules for significant figures are:
- Non-zero digits are always significant.
- Any zeros between two significant digits are always significant.
- A final zero in the decimal portion is also significant.
(b)
Interpretation : The number
Concept Introduction : A number can be changed to given significant figure either by round off or by addition of zero. The rules for significant figures are:
- Non-zero digits are always significant.
- Any zeros between two significant digits are always significant.
- A final zero in the decimal portion is also significant.
(c)
Interpretation : The number
Concept Introduction : A number can be changed to given significant figure either by round off or by addition of zero. The rules for significant figures are:
- Non-zero digits are always significant.
- Any zeros between two significant digits are always significant.
- A final zero in the decimal portion is also significant.
(d)
Interpretation : The number
Concept Introduction : A number can be changed to given significant figure either by round off or by addition of zero. The rules for significant figures are:
- Non-zero digits are always significant.
- Any zeros between two significant digits are always significant.
- A final zero in the decimal portion is also significant.
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
Basic Chemistry
- (1.9) Examine the graph of mass vs. volume of a substance below and answer the following question. How much does the volume (cm³) of the substance would increase when the mass increases from 16.0 g to 35.0 g? 40 15 Mass (g) 35 30 25 20 15 10 5 0 5 Volume (cm^3) 10arrow_forward(1.7) A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.71 g/mL, 1.72 g/mL, 1.71 g/mL, 1.70 g/mL. If the actual value for the density of the sugar solution is 1.50 g/mL, which statement below best describes her results? O Her results are accurate, but not precise. O Her results are precise, but not accurate. O Her results are both precise and accurate O Her results are neither precise nor accurate.arrow_forward1.48 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_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_forwardHow many significant figures does the following calculations yield? (12.2-0.2)/1.02arrow_forwardThe answers 0.10 and 0.099 are both incorrect so please don't give me the same answer. Calculate what the answer is with the correct significant figures at the end? How is that and incomplete question? Perform the calculation and record the answer with the correct number of significant figures. (6.5 - 6.03) 4.73 0.099 Incorrectarrow_forward
- Complete the following operations and write your answer with the correct number of significant figures. Use scientific notation when appropriate. (40.25)(23.4)(1.0001) =arrow_forwardThis is a practice exercise. i will write down the answer that it says on the book for each problems. i need help on how they got that answer. how many significant figures should the answer in each of these calculations contain? just the significant figures only (A) (14.0) (5.2) Answer: 2. (E) 119.1-3.44. answer: 4 (B) (0.1682) (8.2). Answer: 2 (h) 1.6 + 23 - 0.005. Answer: 2 (C) (160)(33)/4. Answer: 1 (D) 8.2+0.125 Answer: 2arrow_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
- Evaluate 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(1.4)Which of the following is a chemical change? O cutting papers O rusting iron O breaking glasses dissolving sugar in waterarrow_forwardCarry out the following mathematical operations, expressing your answer to the correct number of significant figures/decimal places. (78.4 44.889) 0.87arrow_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