
Interpretation:
The way to report the measured value in terms of known and estimated digits needs to be explained.
Concept introduction:
Measured value is a value of a measurement provided by a measuring instrument or device. In a measurement, the last digit is an estimate that helps other scientists to determine the precision of a measurement. All measurements have an estimated value.

Explanation of Solution
In a measurement, the last digit is an estimate that helps other scientists to determine the precision of a measurement. All measurements have an estimated value. The measured value contains all the certain measurements and numbers in the given value. The last digit of a number must be estimated and the estimated digit falls in between the two known digits whose value is not certain.
Chapter 2 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
Additional Science Textbook Solutions
Human Anatomy & Physiology (2nd Edition)
Anatomy & Physiology (6th Edition)
Introductory Chemistry (6th Edition)
Campbell Biology (11th Edition)
Cosmic Perspective Fundamentals
Chemistry: Structure and Properties (2nd Edition)
- Please help me with number 1-3. Thank you so much.arrow_forwardDraw the major product of this reaction ingnore the inorganic byproducts. 1. NaOCH2CH3 at 25 C 2. PhCH2Br (1 eq)arrow_forwardAt 90ºC the vapor pressure of ortho-xylene is 20 kPa and that of meta-xylene is 18 kPa. What is the composition of the vapor in equilibrium with a mixture in which the mole fraction of o-xylene is 0.60?arrow_forward
- Draw the products of this reduction of a ketone with sodium borohydride. Use a dash or wedge bond to indicate the stereochemistry of substituents on asymmetric centers, where applicableIgnore any inorganic byproducts. 1) NaBH4 2) HCI/H2O Select to Drawarrow_forwardWhy do you think people who live at high altitudes are advised to add salt to water when boiling food like pasta? What mole fraction of NaCl is needed to raise the boiling point of H2O by 3˚C? Does the amount of salt added to water (typically about one teaspoon to four quarts of water) substantially change the boiling point? (Kb (H2O) = 0.51˚C/molal.)arrow_forwardpls help asaparrow_forward
- pls help asaparrow_forward9. Consider the following galvanic cell: Fe (s) | Fe(NO3)2 (aq) || Sn(NO3)2 (aq) | Sn (s) a. Write an equation for the half reactions occurring at the anode and cathode. b. Calculate the standard cell potential Show all of your work. c. Draw and label the galvanic cell, including the anode and cathode, direction of electron flow, and direction of ion migration.arrow_forwardpls help asaparrow_forward
- 11. Use the equation below to answer the following questions: 2 Al(s) + 3 Cd(NO3)2 (aq) → 2 Al(NO3)3 (aq) + 3 Cd(s) a. What is the net ionic equation for the reaction? b. Which species is a spectator ion in this reaction? Define a spectator ion. c. Identify the oxidizing agent and the reducing agent.arrow_forwardpls help asaparrow_forwardpls help asaparrow_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





