Introductory Chemistry: A Foundation
9th Edition
ISBN: 9781337399425
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 17ALQ
Complete the following and explain each in your own words: leading zeros are (never/sometimes/always) significant: captive zeros are (never/sometimes/always) significant; and trailing zeros are (never/sometimes/always) significant.
For any statement with an answer of “sometimes,” give examples of when the zero is significant and when it is not, and explain.
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1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT.
For uniformity of answers, please be guided by the following examples:
If your answer is 5.627594, enter 5.628
If your answer is 3.129934, enter 3.130
If your answer is 8.38, enter 8.380
If your answer is 1.2, enter 1.200
If your answer is 25, enter 25.000
If your answer is less than the value of 1, always place a zero before the decimal point
(example: 0.5, enter 0.500)
2. In cases for answers in the exponential format, please be guided by the following examples and format:
Do not convert your answer to decimal format
If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between)
If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between)
3. For the atomic weights, it should be rounded to the nearest whole…
1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT.
For uniformity of answers, please be guided by the following examples:
If your answer is 5.627594, enter 5.628
If your answer is 3.129934, enter 3.130
If your answer is 8.38, enter 8.380
If your answer is 1.2, enter 1.200
If your answer is 25, enter 25.000
If your answer is less than the value of 1, always place a zero before the decimal point
(example: 0.5, enter 0.500)
2. In cases for answers in the exponential format, please be guided by the following examples and format:
Do not convert your answer to decimal format
If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between)
If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between)
3. For the atomic weights, it should be rounded to the nearest whole…
1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT.
For uniformity of answers, please be guided by the following examples:
If your answer is 5.627594, enter 5.628
If your answer is 3.129934, enter 3.130
If your answer is 8.38, enter 8.380
If your answer is 1.2, enter 1.200
If your answer is 25, enter 25.000
If your answer is less than the value of 1, always place a zero before the decimal point
(example: 0.5, enter 0.500)
2. In cases for answers in the exponential format, please be guided by the following examples and format:
Do not convert your answer to decimal format
If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between)
If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between)
3. For the atomic weights, it should be rounded to the nearest whole…
Chapter 2 Solutions
Introductory Chemistry: A Foundation
Ch. 2.1 - Exercise 2.1 Write the numbers 357 and 0.0055 in...Ch. 2.2 - What if you were not allowed to use units for one...Ch. 2.5 - Exercise 2.2 Give the number of significant...Ch. 2.5 - Exercise 2.3 Give the answer for each calculation...Ch. 2.6 - Exercise 2.4 Wine is often bottled in 0.750-L...Ch. 2.6 - Exercise 2.5 Racing cars at the Indianapolis Motor...Ch. 2.7 - Exercise 2.6 Which temperature is colder, 172 K or...Ch. 2.7 - Exercise 2.7 Hot tubs are often maintained at 41...Ch. 2.7 - Exercise 2.8 An antifreeze solution in a car’s...Ch. 2.8 - Exercise 2.9A student wants to identify the main...
Ch. 2 - a. There are 365 days/year, 24 hours/day, 12...Ch. 2 - You go to a convenience store to buy candy and...Ch. 2 - When a marble is dropped into a beaker of water,...Ch. 2 - Consider water in each graduated cylinder as...Ch. 2 - What is the numerical value of a conversion...Ch. 2 - For each of the following numbers, indicate which...Ch. 2 - Consider the addition of “1 5.4” to “28.” What...Ch. 2 - Consider multiplying “26.2” by “16.43.” What would...Ch. 2 - In lab you report a measured volume of 128.7 mL of...Ch. 2 - Sketch two pieces of glassware: one that can...Ch. 2 - Oil floats on water but is “thicker” than water....Ch. 2 - Show how converting numbers to scientific notation...Ch. 2 - You are driving 65mph and take your eyes oil the...Ch. 2 - You have a1.0cm3 sample of lead and a1.0cm3 sample...Ch. 2 - The beakers shown below have different precisions....Ch. 2 - True or false? For any mathematical operation...Ch. 2 - Complete the following and explain each in your...Ch. 2 - For each of the following figures, a through d,...Ch. 2 - For the pin shown below, why is the third digit...Ch. 2 - Why can the length of the pin shown below not be...Ch. 2 - Use the figure below to answer the following...Ch. 2 - A represents a quantitative observation.Ch. 2 - Although your textbook lists (he rules for...Ch. 2 - When a large or small number is written in...Ch. 2 - When a large or small number is written in...Ch. 2 - Will the power of 10 have apositiveor...Ch. 2 - Prob. 6QAPCh. 2 - Express each of the following numbers...Ch. 2 - Rewrite each of the following as an “ordinary”...Ch. 2 - By how many places must the decimal point be...Ch. 2 - By how many places must the decimal point be...Ch. 2 - Prob. 11QAPCh. 2 - Write each of the following numbers as “ordinary”...Ch. 2 - Write each of the following numbers...Ch. 2 - Prob. 14QAPCh. 2 - What are the fundamental units of mass, length,...Ch. 2 - Give the metric prefix that corresponds to each of...Ch. 2 - Students often have trouble relating measurements...Ch. 2 - Students often have trouble relating measurements...Ch. 2 - Students often have trouble relating measurements...Ch. 2 - Students often have trouble relating measurements...Ch. 2 - The road sign I just passed says “New York City...Ch. 2 - The GPS in my car indicates that t have 100. mi...Ch. 2 - The tablecloth on my dining room table is 2 in...Ch. 2 - Who is taller, a man who is 1.62 in tall or a...Ch. 2 - The fundamental SI unit of length is the meter....Ch. 2 - 26. 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When...Ch. 2 - When 2891 is written in scientific notation, the...Ch. 2 - For each of the following numbers, if the number...Ch. 2 - For each of the following numbers, if the number...Ch. 2 - Prob. 116APCh. 2 - For each of the following numbers, by how many...Ch. 2 - For each of the following numbers, by how many...Ch. 2 - Express each of the following numbers in...Ch. 2 - Express each of the following as an “ordinary”...Ch. 2 - Prob. 121APCh. 2 - Prob. 122APCh. 2 - Prob. 123APCh. 2 - Draw a piece of lab glassware that can...Ch. 2 - Which distance is farther, 100 km or 50 mi?Ch. 2 - 1L= ________dm3= ________cm3= ________mLCh. 2 - The volume 0.250 L could also be expressed as mL.Ch. 2 - The distance 10.5 cm could also be expressed as m.Ch. 2 - Would an automobile moving at a constant speed of...Ch. 2 - Which weighs more, 0.001 g of water or 1 mg of...Ch. 2 - Which weighs more, 4.25 g of gold or 425 mg of...Ch. 2 - The length 500 m can also be expressed as nm.Ch. 2 - A perfect cube of unknown elemental composition...Ch. 2 - You are working on a project where you need the...Ch. 2 - Indicate the number of significant figures in each...Ch. 2 - Prob. 136APCh. 2 - Round off each of the following numbers to the...Ch. 2 - Prob. 138APCh. 2 - Prob. 139APCh. 2 - Prob. 140APCh. 2 - Prob. 141APCh. 2 - A rectangular solid measures 1.0 in by 2.4 mm by...Ch. 2 - Perform each of the following conversions, being...Ch. 2 - Perform each of the following conversions, being...Ch. 2 - The mean distance from the earth to (he sun ismi....Ch. 2 - Given that one metric ton = 1000 kg, how many...Ch. 2 - Convert the following temperatures to kelvins. 0°C...Ch. 2 - Carry out the indicated temperature conversions....Ch. 2 - For the masses and volumes indicated, calculate...Ch. 2 - A sample of a liquid solvent has a density of...Ch. 2 - An organic solvent has a density of 1.31 g/mL....Ch. 2 - A solid metal sphere has a volume of 4.2 ft3. 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