ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM
ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM
3rd Edition
ISBN: 9781264452545
Author: SMITH
Publisher: MCG
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Chapter 1.5, Problem 1.13P
Interpretation Introduction

(a)

Interpretation:

The number 1.2735 should be rounded off to two significant figures.

Concept Introduction:

Significant figures are used to express the degree of accuracy of an answer. The rules for identifying significant figures are as follows:

  • Non-zero digits are considered as significant figures. (1 to 9)
  • Zeros between non-zero digits are considered as significant figures. (for example, 2008 has four significant figures.)
  • Zeros that are left to the decimal are not considered as significant figures. (for example, 0000.28 has two significant figures.)
  • On the right side of the decimal place, zeros between decimal and non-zero digits are not considered as significant figures. (for example, 0.0028 has two significant figures.)
  • On the right side of the decimal place, zeros after the non-zero digits are considered as significant figures. (0.28000 has five significant figures.)

The rules for rounding off numbers are as follows:

  • If the figure after the decimal is less than 5, then the digit remains unchanged.
  • If the figure after the decimal is greater than 5 or equal to 5, then 1 is added to the tenths place.
  • If the figure after the decimal is even, then the digit remains unchanged.
  • If the figure after the decimal is odd, then 1 is added to the tenths place.

Interpretation Introduction

(b)

Interpretation:

The number 0.00253622 should be rounded off to two significant figures.

Concept Introduction:

Significant figures are used to express the degree of accuracy of an answer. The rules for identifying significant figures are as follows:

  • Non-zero digits are considered as significant figures. (1 to 9)
  • Zeros between non-zero digits are considered as significant figures. (for example, 2008 has four significant figures.)
  • Zeros that are left to the decimal are not considered as significant figures. (for example, 0000.28 has two significant figures.)
  • On the right side of the decimal place, zeros between decimal and non-zero digits are not considered as significant figures. (for example, 0.0028 has two significant figures.)
  • On the right side of the decimal place, zeros after the non-zero digits are considered as significant figures. (0.28000 has five significant figures.)

The rules for rounding off numbers are as follows:

  • If the figure after the decimal is less than 5, then the digit remains unchanged.
  • If the figure after the decimal is greater than 5 or equal to 5, then 1 is added to the tenths place.
  • If the figure after the decimal is even, then the digit remains unchanged.
  • If the figure after the decimal is odd, then 1 is added to the tenths place.

Interpretation Introduction

(c)

Interpretation:

The number 3,836.9 should be rounded off to two significant figures.

Concept Introduction:

Significant figures are used to express the degree of accuracy of an answer. The rules for identifying significant figures are as follows:

  • Non-zero digits are considered as significant figures. (1 to 9)
  • Zeros between non-zero digits are considered as significant figures. (for example, 2008 has four significant figures.)
  • Zeros that are left to the decimal are not considered as significant figures. (for example, 0000.28 has two significant figures.)
  • On the right side of the decimal place, zeros between decimal and non-zero digits are not considered as significant figures. (for example, 0.0028 has two significant figures.)
  • On the right side of the decimal place, zeros after the non-zero digits are considered as significant figures. (0.28000 has five significant figures.)

The rules for rounding off numbers are as follows:

  • If the figure after the decimal is less than 5, then the digit remains unchanged.
  • If the figure after the decimal is greater than 5 or equal to 5, then 1 is added to the tenths place.
  • If the figure after the decimal is even, then the digit remains unchanged.
  • If the figure after the decimal is odd, then 1 is added to the tenths place.

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Chapter 1 Solutions

ALEKS 360 ACCESS CARD F/GEN. ORG.CHEM

Ch. 1.5 - How many significant figures does each number...Ch. 1.5 - Indicate whether each zero in the following...Ch. 1.5 - Prob. 1.13PCh. 1.5 - Carry out each caluction and give the answer using...Ch. 1.5 - Carry out each calculation and give the answer...Ch. 1.6 - Lab results for a routine check-up showed an...Ch. 1.6 - Write each number in scientific notation. 93,200...Ch. 1.6 - Convert each number to its standard form. 6.5103...Ch. 1.7 - Write two conversion factors for each pair of...Ch. 1.7 - Prob. 1.20PCh. 1.7 - Carry out each of the following conversions. 25 L...Ch. 1.7 - What is the volume of liquid contained in the...Ch. 1.7 - Carry out each of the following conversions. 6,250...Ch. 1.8 - Prob. 1.24PCh. 1.8 - A patient is prescribed 0.100 mg of a drug that is...Ch. 1.8 - Prob. 1.26PCh. 1.9 - Prob. 1.27PCh. 1.9 - Prob. 1.28PCh. 1.10 - How does the mass of liquid A in cylinder [1]...Ch. 1.10 - Calculate the mass in grams of 10.0 mL of diethyl...Ch. 1.10 - If a 120-lb woman uses five 2.0lb lead weights in...Ch. 1.10 - If the density of a liquid is 0.80 g/mL, what is...Ch. 1 - Classify each example of molecular art as a pure...Ch. 1 - (a) Which representation(s) in Problem 1.19...Ch. 1 - Label each component in the molecular art as an...Ch. 1 - Label each component in the molecular art as an...Ch. 1 - Prob. 1.37PCh. 1 - Prob. 1.38PCh. 1 - Prob. 1.39PCh. 1 - Classify each process as a chemical or physical...Ch. 1 - Prob. 1.41PCh. 1 - Prob. 1.42PCh. 1 - What is the temperature on the given Fahrenheit...Ch. 1 - a. What is the length of the given crayon in...Ch. 1 - What is the difference between an exact number and...Ch. 1 - Label each quantity as an exact or inexact number....Ch. 1 - Which quantity in each pair is larger? 5 mL or 5...Ch. 1 - Which quantity in each pair is larger? 10 km or 10...Ch. 1 - How many significant figures does each number...Ch. 1 - Prob. 1.50PCh. 1 - Prob. 1.51PCh. 1 - Round each number ¡n Problem 1.51 to four...Ch. 1 - Prob. 1.53PCh. 1 - Prob. 1.54PCh. 1 - Prob. 1.55PCh. 1 - Prob. 1.56PCh. 1 - Prob. 1.57PCh. 1 - Prob. 1.58PCh. 1 - Prob. 1.59PCh. 1 - Rank the numbers in each group from smallest to...Ch. 1 - Prob. 1.61PCh. 1 - Prob. 1.62PCh. 1 - Prob. 1.63PCh. 1 - What is the volume of liquid contained in the...Ch. 1 - Prob. 1.65PCh. 1 - (a) If there are 15 mL in one tablespoon, how many...Ch. 1 - Prob. 1.67PCh. 1 - Prob. 1.68PCh. 1 - Carry out each of the following conversions. a....Ch. 1 - Carry out each of the following conversions. a....Ch. 1 - Prob. 1.71PCh. 1 - Prob. 1.72PCh. 1 - Prob. 1.73PCh. 1 - Prob. 1.74PCh. 1 - Which temperature in each pair is higher? a....Ch. 1 - Prob. 1.76PCh. 1 - Prob. 1.77PCh. 1 - Prob. 1.78PCh. 1 - Prob. 1.79PCh. 1 - Prob. 1.80PCh. 1 - Prob. 1.81PCh. 1 - If gasoline has a density of 0.66 g/mL, what is...Ch. 1 - Which is the upper layer when each of the...Ch. 1 - Prob. 1.84PCh. 1 - A lab test showed an individual’s chloesterol leve...Ch. 1 - Hemoglobin is a protein that transports oxygen...Ch. 1 - Prob. 1.87PCh. 1 - A soccer weighed 70.7 kg before a match, drank 1.8...Ch. 1 - Liposuction is a cosmetic procedure used to remove...Ch. 1 - A single 1-oz serving of tortilla chips contains...Ch. 1 - Prob. 1.91PCh. 1 - Prob. 1.92PCh. 1 - Prob. 1.93PCh. 1 - Prob. 1.94PCh. 1 - Prob. 1.95PCh. 1 - Prob. 1.96PCh. 1 - Often the specific amount of a drug to be...Ch. 1 - Prob. 1.98CPCh. 1 - Prob. 1.99CPCh. 1 - Prob. 1.100CPCh. 1 - Prob. 1.101CPCh. 1 - Prob. 1.102CPCh. 1 - Prob. 1.103CPCh. 1 - If the proper dosage of a medication is 10g/kg of...
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