Concept explainers
(a)
Interpretation:
Calculations have to be carried out for
Concept Introduction:
Significant figures: The digits that are measured in a number including one estimated digit are called as significant figures.
The answers for those calculations that involve addition and subtraction will have the same number of decimal places as the original number with the fewest decimal places.
(a)
Answer to Problem 13PE
The answer for the sum of
Explanation of Solution
The calculation for
The number with the least precision is
(b)
Interpretation:
Calculations have to be carried out for
Concept Introduction:
Significant figures: The digits that are measured in a number including one estimated digit are called as significant figures.
The answers for those calculations that involve multiplication and division will have the same number of significant figures as the original number with the fewest number of significant figures.
(b)
Answer to Problem 13PE
The answer for the product of
Explanation of Solution
The product of
The decimal point is placed between 1 and 0. Since it’s shifted towards left, the number
(c)
Interpretation:
Calculations have to be carried out for
Concept Introduction:
Refer to part (b).
(c)
Answer to Problem 13PE
The answer for
Explanation of Solution
The answer for
In the number
(d)
Interpretation:
Calculations have to be carried out for
Concept Introduction:
Refer to part (b).
(d)
Answer to Problem 13PE
The answer for
Explanation of Solution
The product of
In the number
(e)
Interpretation:
Calculations have to be carried out for
Concept Introduction:
Refer to part (b).
(e)
Answer to Problem 13PE
The answer for
Explanation of Solution
The answer for
In the number
(f)
Interpretation:
Calculations have to be carried out for
Concept Introduction:
Refer to part (b).
(f)
Answer to Problem 13PE
The answer for
Explanation of Solution
The answer for
The decimal point is shifted between
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Chapter 2 Solutions
FOUND.OF COLLEGE CHEMISTRY
- Express the results of the following multiplications and divisions to the proper number of significant figures. All of the numbers are measured quantities. (a) 129.587 × 32.33 = 4.7791 (b) 3.21 × 5.793 10566.9 (c) 3.584 × 1029 (d) (5.247 × 10'3) × (1.3 × 10-17) =arrow_forwardExpress the results of the following additions and subtractions to the proper number of significant figures. All of thenumbers are measured quantities.(a) 245.876+ 4.65+ 0.3678 =(b) 798.36 - 1005.7 + 129.652 =(c) 7.98 × 1017 + 6.472 × 1019 =(d) (4.32 × 10-15) - (6.257 × 10-14) - (2.136 × 10-13) =arrow_forwardPerform each of the following operations, using your calculator where possible:(a) Write the number 0.0054 in standard exponential notation. (b) (5.0 x 10-2) + (4.7 x 10-3) (c) (5.98 x 1012) (2.77 x 10-5) (d) 4√1.75 x 10-12arrow_forward
- Evaluate each of the following mathematical expressions, and express the answer to the correct number of significant digits. (a) 45.3468 + 0.85 + 7.468 (b) 9.4458 + 3.7675 - 2.71 (c) 0.8294 + 0.217 + 4.96 (d) (7.611 + 9.81 + 3.6117) / 3.0arrow_forwardPerform the following calculations and report each answer with the correct number of significant figures. (a) 635 ✕ 335 (b) (5.23 ✕ 102) ✕ (6.8 ✕ 103) (c) 27.2/13.383 (d) 8179 ✕ 0.000051 (e) 14.23 + 27360 + 84.5721 (f) 47.2 + 0.291arrow_forward3. Solve the following problems, stating answers to the proper number of significant figures:(a) 12.62 + 1.5 + 0.25 = (b) (2.25 x 103) (4.80 x 104) = (c) 10.4 + 3.75 (1.5 x 104) =arrow_forward
- 3. Solve the following problems, stating answers to the proper number of significant figures: (a) 12.62 + 1.5 + 0.25 = (b) (2.25 x 10³) (4.80 x 104) = (c) 10.4 + 3.75 (1.5 x 104) =arrow_forwardHow many significant figures do the following numbers contain? (a) 1.233 + .1 (b) 1.233*.1 (c) 1.233/.01arrow_forwardCalculate each of the following expressions, giving youranswers the proper numbers of significant figures.(a) log (3.56 × 104)(b) e-15.69(c) 108.41(d) ln (6.893 × 10-22)arrow_forward
- Express the results of the following additions and subtractions to the proper number of significant figures. All of thenumbers are measured quantities.(a) 67.314+8.63 - 243.198=(b) 4.31 +64 +7.19 =(c) 3.1256 × 1015 - 4.631 × 1013 =(d) 2.41 × 10-26 -7.83 × 10-25 =arrow_forwardHow many significant figures are there in each of the following? (a) 61.8 ± 0.1 (b) 3.407 x 10⁹ (c) 2.0400 x 10-6 (d) 0.0040 Need Help? Read Itarrow_forwardCarry out the following operations and express the answerswith the appropriate number of significant figures.(a) 14.3505 + 2.65 (b) 952.7 - 140.7389(c) (3.29 x104)(0.2501) (d) 0.0588/0.677arrow_forward
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