
Concept explainers
(a)
Interpretation:
The given mathematical operation has to be done in right way and the answer should be written in correct unit with the correct number of significant figures.
Concept introduction:
Significant figures are all the digits in a measurement that are known with certainty.
Rules for significant digits
- Digits from 1 to 9 are always significant
- Zeros between two other significant digits are always significant.
- One or more additional zeroes to the right of both the decimal place and other significant digits are significant.
- Zeroes used solely for spacing the decimal point are not significant.
Rules for rounding off numbers
If the digits to the immediate right of the last significant figure are less than five do not change.
Example:
If the digit to the immediate right of the last significant figures is greater than five, round up the last significant figures.
Example:
(a)

Explanation of Solution
Given,
All the given terms are in same unit so conversions of units are not required. This division operation can be done as follows,
The three in
The answer with correct unit with the correct number of significant figures is
(b)
Interpretation:
The given mathematical operation has to be done in right way and the answer should be written in correct unit with the correct number of significant figures.
Concept introduction:
Significant figures are all the digits in a measurement that are known with certainty.
Rules for significant digits
- Digits from 1 to 9 are always significant
- Zeros between two other significant digits are always significant
- One or more additional zeroes to the right of both the decimal place and other significant digits are significant.
- Zeroes used solely for spacing the decimal point are not significant.
Rules for rounding off numbers
If the digits to the immediate right of the last significant figure are less than five do not change.
Example:
If the digit to the immediate right of the last significant figures is greater than five, round up the last significant figures.
Example:
(b)

Explanation of Solution
Given,
All the given terms are in same unit so conversions of units are not required. This subtraction operation can be done as follows,
Writing both numbers in decimal notation,
The answer with correct unit with the correct number of significant figures is
The bolded digits in
(c)
Interpretation:
The given mathematical operation has to be done in right way and the answer should be written in correct unit with the correct number of significant figures.
Concept introduction:
Significant figures are all the digits in a measurement that are known with certainty.
Rules for significant digits
- Digits from 1 to 9 are always significant
- Zeros between two other significant digits are always significant.
- One or more additional zeroes to the right of both the decimal place and other significant digits are significant.
- Zeroes used solely for spacing the decimal point are not significant.
Rules for rounding off numbers
If the digits to the immediate right of the last significant figure are less than five do not change.
Example:
If the digit to the immediate right of the last significant figures is greater than five, round up the last significant figures.
Example:
(c)

Explanation of Solution
Given,
All the given terms are in same unit so conversions of units are not required. This addition operation can be done as follows,
Writing both number with exponents which is equal to
The answer with correct unit with the correct number of significant figures is
(d)
Interpretation:
The given mathematical operation has to be done in right way and the answer should be written in correct unit with the correct number of significant figures.
Concept introduction:
Significant figures are all the digits in a measurement that are known with certainty.
Rules for significant digits
- Digits from 1 to 9 are always significant
- Zeros between two other significant digits are always significant.
- One or more additional zeroes to the right of both the decimal place and other significant digits are significant.
- Zeroes used solely for spacing the decimal point are not significant.
Rules for rounding off numbers
If the digits to the immediate right of the last significant figure are less than five do not change.
Example:
If the digit to the immediate right of the last significant figures is greater than five, round up the last significant figures.
Example:
(d)

Explanation of Solution
Given,
This subtraction, addition and division operation can be done as follows,
The answer with correct unit with the correct number of significant figures is
Want to see more full solutions like this?
Chapter 1 Solutions
General Chemistry
- Please answer the questions in the photos and please revise any wrong answers. Thank youarrow_forward(Please be sure that 7 carbons are available in the structure )Based on the 1H NMR, 13C NMR, DEPT 135 NMR and DEPT 90 NMR, provide a reasoning step and arrive at the final structure of an unknown organic compound containing 7 carbons. Dept 135 shows peak to be positive at 128.62 and 13.63 Dept 135 shows peak to be negative at 130.28, 64.32, 30.62 and 19.10.arrow_forward-lease help me answer the questions in the photo.arrow_forward
- For the reaction below, the concentrations at equilibrium are [SO₂] = 0.50 M, [0] = 0.45 M, and [SO3] = 1.7 M. What is the value of the equilibrium constant, K? 2SO2(g) + O2(g) 2SO3(g) Report your answer using two significant figures. Provide your answer below:arrow_forwardI need help with this question. Step by step solution, please!arrow_forwardZn(OH)2(s) Zn(OH)+ Ksp = 3 X 10-16 B₁ = 1 x 104 Zn(OH)2(aq) B₂ = 2 x 1010 Zn(OH)3 ẞ3-8 x 1013 Zn(OH) B4-3 x 1015arrow_forward
- Help me understand this by showing step by step solution.arrow_forwardscratch paper, and the integrated rate table provided in class. our scratch work for this test. Content attribution 3/40 FEEDBACK QUESTION 3 - 4 POINTS Complete the equation that relates the rate of consumption of H+ and the rate of formation of Br2 for the given reaction. 5Br (aq) + BrO3 (aq) + 6H (aq) →3Br2(aq) + 3H2O(l) • Your answers should be whole numbers or fractions without any decimal places. Provide your answer below: Search 尚 5 fn 40 * 00 99+ 2 9 144 a [arrow_forward(a) Write down the structure of EDTA molecule and show the complex structure with Pb2+ . (b) When do you need to perform back titration? (c) Ni2+ can be analyzed by a back titration using standard Zn2+ at pH 5.5 with xylenol orange indicator. A solution containing 25.00 mL of Ni2+ in dilute HCl is treated with 25.00 mL of 0.05283 M Na2EDTA. The solution is neutralized with NaOH, and the pH is adjusted to 5.5 with acetate buffer. The solution turns yellow when a few drops of indicator are added. Titration with 0.02299 M Zn2+ requires 17.61 mL to reach the red end point. What is the molarity of Ni2+ in the unknown?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





