Concept explainers
(a)
Interpretation:
Whether brass is homogeneous or a heterogeneous mixture needs to be determined.
Concept introduction:
A pure substance is one that are made up of only one kind of atom or molecule.
Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.
Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Answer to Problem 82A
Brass is an element hence homogeneous.
Explanation of Solution
Homogeneous mixture is the mixture of two or more substances that are not separable as they are present in the same phase example: the mixture of two gases. Brass that is an alloy of zinc and copper has varying properties from that of zinc and copper.
(b)
Interpretation:
Whether salad is a homogeneous or a heterogeneous mixture needs to be determined.
Concept introduction:
A pure substance is one that are made up of only one kind of atom or molecule.
Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.
Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.
(b)

Answer to Problem 82A
Salad is heterogeneous.
Explanation of Solution
Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.
Salad is a heterogeneous as the ingredients that are mixed to form a salad are solid and easily separable.
(c)
Interpretation:
Whether blood is a homogeneous or a heterogeneous mixture needs to be determined.
Concept introduction:
A pure substance is one that are made up of only one kind of atom or molecule.
Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.
Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.
(c)

Answer to Problem 82A
Blood is homogeneous.
Explanation of Solution
Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.
Blood that constitutes different components that are not visible to eye. Though these different components can be seen under a microscope.
(d)
Interpretation:
Whether powered drink dissolved in water is a homogeneous or a heterogeneous mixture needs to be determined.
Concept introduction:
A pure substance is one that are made up of only one kind of atom or molecule.
Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.
Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.
(d)

Answer to Problem 82A
Powdered drink dissolved in water is a homogeneous mixture.
Explanation of Solution
Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.
Powdered drink dissolved in water is a homogeneous mixture as they cannot be seen or separated by a filter paper.
Chapter 3 Solutions
Chemistry: Matter and Change
Additional Science Textbook Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Microbiology: An Introduction
Campbell Biology in Focus (2nd Edition)
Campbell Biology: Concepts & Connections (9th Edition)
Introductory Chemistry (6th Edition)
Applications and Investigations in Earth Science (9th Edition)
- Using the Nernst equation to calculate nonstandard cell voltage A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction: MnO2 (s)+4H* (aq)+2Cr²+ (aq) → Mn²+ (aq)+2H₂O (1)+2Cr³+ (aq) + 2+ 2+ 3+ Suppose the cell is prepared with 7.44 M H* and 0.485 M Cr²+ in one half-cell and 7.92 M Mn² and 3.73 M Cr³+ in the other. Calculate the cell voltage under these conditions. Round your answer to 3 significant digits. ☐ x10 μ Х 5 ? 000 日。arrow_forwardCalculating standard reaction free energy from standard reduction... Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy AG° for the following redox reaction. Be sure your answer has the correct number of significant digits. NO (g) +H₂O (1) + Cu²+ (aq) → HNO₂ (aq) +H* (aq)+Cu* (aq) kJ - ☐ x10 x10 olo 18 Ararrow_forwardCalculating the pH of a weak base titrated with a strong acid b An analytical chemist is titrating 116.9 mL of a 0.7700M solution of aniline (C6H5NH2) with a 0.5300M solution of HNO3. The pK of aniline is 9.37. Calculate the pH of the base solution after the chemist has added 184.2 mL of the HNO 3 solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO3 solution added. Round your answer to 2 decimal places. pH = ☐ ☑ 5arrow_forward
- QUESTION: Find the standard deviation for the 4 different groups 5.298 3.977 223.4 148.7 5.38 4.24 353.7 278.2 5.033 4.044 334.6 268.7 4.706 3.621 305.6 234.4 4.816 3.728 340.0 262.7 4.828 4.496 304.3 283.2 4.993 3.865 244.7 143.6 STDEV = STDEV = STDEV = STDEV =arrow_forwardQUESTION: Fill in the answers in the empty green boxes regarding 'Question 5: Calculating standard error of regression' *The images of the data showing 'coefficients for the standard curve' have been providedarrow_forwardUsing the Nernst equation to calculate nonstandard cell voltage Try Again Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations. A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction: 2+ 2+ Sn²+ Ba(s) (aq) + Ba (s) Sn (s) + Ba²+ (aq) →>> Suppose the cell is prepared with 6.10 M Sn 2+ 2+ in one half-cell and 6.62 M Ba in the other. Calculate the cell voltage under these conditions. Round your answer to 3 significant digits. 1.71 V ☐ x10 ☑ 5 0/5 ? 00. 18 Ararrow_forward
- Question: Find both the b (gradient) and a (y-intercept) value from the list of data below: (x1 -x̄) 370.5 (y1 - ȳ) 5.240 (x2 - x̄) 142.5 (y2 - ȳ) 2.004 (x3 - x̄) 28.5 (y3 - ȳ) 0.390 (x4 - x̄) -85.5 (y4 - ȳ) -1.231 (x5 - x̄) -199.5 (y5 - ȳ) -2.829 (x6 - x̄) -256.5 (y6 - ȳ) -3.575arrow_forwardCalculating standard reaction free energy from standard reduction... Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy AG° for the following redox reaction. Be sure your answer has the correct number of significant digits. 3Cu+ (aq) + Cro²¯ (aq) +4H₂O (1) → 3Cu²+ (aq) +Cr(OH)3 (s)+5OH˜¯ (aq) 0 kJ ☐ x10 00. 18 Ararrow_forwardCalculating the pH of a weak base titrated with a strong acid An analytical chemist is titrating 241.7 mL of a 0.4900M solution of methylamine (CH3NH2) with a 0.7800M solution of HNO3. The pK of methylamine is 3.36. Calculate the pH of the base solution after the chemist has added 17.7 mL of the HNO3 solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO3 solution added. Round your answer to 2 decimal places. pH = ☑ ? 18 Ararrow_forward
- The following is two groups (Regular tomato sauce & Salt Reduced Tomato Sauce) of data recorded by a team analysising salt content in tomato sauce using the MOHR titration method: Regular Tomato Sauce Salt Reduced Tomato Sauce 223.4 148.7 353.7 278.2 334.6 268.7 305.6 234.4 340.0 262.7 304.3 283.2 244.7 143.6 QUESTION: For both groups of data calculate the answers attached in the image.arrow_forwardThe following is a two groups (Regular tomato sauce & Salt Reduced Tomato Sauce) of data recorded by a team analysising salt content in tomato sauce using the MOHR titration method: Regular Tomato Sauce Salt Reduced Tomato Sauce 340.0mmol/L 262.7mmol/L QUESTION: For both groups (Regular & Salt Reduced tomato sauce) of data provide answers to the following calculations below: 1. Standard Deviation (Sx) 2. T Values (t0.05,4) 3. 95% Confidence Interval (mmol/L) 4. [Na+] (mg/100 mL) 5. 95% Confidence Interval (mg/100 mL)arrow_forwardIf we have leucine (2-amino-4-methylpentanoic acid), alanine (2-aminopropanoic acid) and phenylalanine (2-amino-3-phenylpropanoic acid), indicate the tripeptides that can be formed (use the abbreviated symbols Leu., Ala and Phe).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





