
Concept explainers
(a)
Interpretation:
The given number has to be rounded to three significant figures.
Concept Introduction:
Significant Figures:
While reporting a reading of a measurement, the digits that are considered to be significant irrespective of the place of location of decimal point are called significant figures.
All the digits in a measurement except zero are considered significant, whereas zero is considered as significant only when it lies in the middle of the digit or at the end of number on the right-hand side of a decimal point.
Rounding off:
Rounding off gives a simpler numeral by maintaining the value close to its original value.
Steps for Rounding off:
- The location of rounding should be found.
- If the next digit after the rounding place is greater than 5 (i.e 5, 6, 7, 8 or 9) the value will be rounded up
- If the next digit after the rounding place is lesser than 5, (i.e 0, 1, 2, 3 or 4) the value will be rounded down.
To Round: The given number to three significant figures
(b)
Interpretation:
The given number has to be rounded to three significant figures.
Concept Introduction:
Significant Figures:
While reporting a reading of a measurement, the digits that are considered to be significant irrespective of the place of location of decimal point are called significant figures.
All the digits in a measurement except zero are considered significant, whereas zero is considered as significant only when it lies in the middle of the digit or at the end of number on the right-hand side of a decimal point.
Rounding off:
Rounding off gives a simpler numeral by maintaining the value close to its original value.
Steps for Rounding off:
- The location of rounding should be found.
- If the next digit after the rounding place is greater than 5 (i.e 5, 6, 7, 8 or 9) the value will be rounded up
- If the next digit after the rounding place is lesser than 5, (i.e 0, 1, 2, 3 or 4) the value will be rounded down.
To Round: The given number to three significant figures
(c)
Interpretation:
The given number has to be rounded to three significant figures.
Concept Introduction:
Significant Figures:
While reporting a reading of a measurement, the digits that are considered to be significant irrespective of the place of location of decimal point are called significant figures.
All the digits in a measurement except zero are considered significant, whereas zero is considered as significant only when it lies in the middle of the digit or at the end of number on the right-hand side of a decimal point.
Rounding off:
Rounding off gives a simpler numeral by maintaining the value close to its original value.
Steps for Rounding off:
- The location of rounding should be found.
- If the next digit after the rounding place is greater than 5 (i.e 5, 6, 7, 8 or 9) the value will be rounded up
- If the next digit after the rounding place is lesser than 5, (i.e 0, 1, 2, 3 or 4) the value will be rounded down.
To Round: The given number to three significant figures

Want to see the full answer?
Check out a sample textbook solution
Chapter 3 Solutions
Quantitative Chemical Analysis
- Drawing of 3-fluro-2methylphenolarrow_forwardWhich compound(s) will be fully deprotonated (>99%) by reaction with one molar equivalent of sodium hydroxide? I, II, III I, || I, III I only II, III SH | H3C-C=C-H || III NH2arrow_forwardWill NBS (and heat or light) work for this reaction, or do we have to use Br2?arrow_forward
- HAND DRAWarrow_forwardPredict the major products of the following organic reaction: Some important notes: Δ CN ? • Draw the major product, or products, of the reaction in the drawing area below. • If there aren't any products, because no reaction will take place, check the box below the drawing area instead. Be sure to use wedge and dash bonds when necessary, for example to distinguish between major products that are enantiomers. ONO reaction. Click and drag to start drawing a structure.arrow_forwardThe following product was made from diethyl ketone and what other reagent(s)? £ HO 10 2-pentyne 1-butyne and NaNH2 ☐ 1-propanol ☐ pyridine butanal ☐ pentanoatearrow_forward
- Which pair of reagents will form the given product? OH X + Y a. CH3 b. CH2CH3 ༧་་ C. CH3- CH2CH3 d.o6.(རི॰ e. CH3 OCH2CH3 -MgBr f. CH3-MgBr g. CH3CH2-MgBr -C-CH3 CH2CH3arrow_forwardQuestion 3 What best describes the product of the following reaction? 1. CH3CH2MgBr (2 eq) 2. H a new stereocenter will not be formed a new stereocenter will be formed an alkyl halide will result an alkane will result an aromatic compound will result 1 ptsarrow_forwardRank the following from most to least reactive toward nucleophilic attack. 1. [Select] [Select] 2. Acyl halide Aldehyde 3. Carboxylate ion 4. Carboxylic acid Ketone 5. [Select]arrow_forward
- Question 10 1 pts Which of the following is the most accurate nomenclature? 1-hydroxy-1-methyldecane-4,7-dione 2-hydroxy-2-methyldecane-5,8-dione 4,6-dioxo-2-methyldecane-2-ol 9-hydroxy-9-methyldecane-3,6-dione 8-hydroxy-8-methylnonane-3,6-dione OHarrow_forwardCould you please explain whether my thinking is correct or incorrect regarding how I solved it? Please point out any mistakes in detail, with illustrations if needed.arrow_forwardWhat are the most proper reagents to achieve these products? سد 1. 2. OH ○ 1. BrMgC6H6; 2. H+ ○ 1. BrMgCH2CH2CH2CH2CH3; 2. H+ O 1. CH3CH2CHO; 2. H+ O 1. BrMgCH2CH3; 2. 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





