Chemistry for Engineering Students
4th Edition
ISBN: 9781337398909
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 2, Problem 2.97PAE
2.97 LDPE has a density in the range of 0.915—0.935 g/cm3, and HDPF has a density in the range of 0.940—0.965 g/cm3. You receive a small disk, 2.0 cm high with a 6.0-cm diameter, from a manufacturer of polyethylene, but its label is missing. You measure the mass of the disk and find that it is 53.8 g. Is the material HDPE or LDPE?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Consider Molecule X, which is found in all living cells. This single-strand nucleic acid folds into a compact shape and forms a large complex with about 80
proteins. This complex is responsible for synthesizing new proteins in a living cell.
What is the name of X? Your answer should be one word, or a short two- or three-word phrase. Spelling counts.
Note: if there is more than one possible answer, separate each answer with a comma.
☐
×
Part A
A box of clear plastic wrap for household une is polyethylene,{ CH. with density = 0.910 Mg/m. A box of this product contains 103 ft of material (in a roll 304 mm wide by
31.5 m long). If the wrap is 0.2 mil (5.08 um) thick, calculate the number of carbon atoms and the number of hydrogen atoms in this roll.
Express your answers, separated by a comma, to three significant figures.
it
vec
Ne stum N ato
Submit
Previous Answers Reauest Answer
student found a bottle of unknown origin in the basement of an
"CAUTION—contains С₁H₁O.” No other
A
old house. The bottle was labelled
information was given, but inside the bottle were some white crystals.
The student took the bottle to a chemistry laboratory, where she analyzed the
crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4
adding one mole of Br, and forming C₁₂H₁OB2₂.
When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two
different samples, J and K, were obtained. Compound J had a molecular formula
of C.HgO₂, and its NMR is shown below.
Compound K had a molecular formula of C₂H₂O, and it could be oxidized to
compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed
a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L
showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet
(1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm.
students, deduce possible…
Chapter 2 Solutions
Chemistry for Engineering Students
Ch. 2 - Name at least three common polymers and give...Ch. 2 - Prob. 2COCh. 2 - Describe the nuclear model for the atom and...Ch. 2 - Prob. 4COCh. 2 - Prob. 5COCh. 2 - Prob. 6COCh. 2 - Prob. 7COCh. 2 - Prob. 8COCh. 2 - Prob. 9COCh. 2 - Prob. 10CO
Ch. 2 - Prob. 2.1PAECh. 2 - How do polymers compare to their respective...Ch. 2 - Look around you and identify several objects that...Ch. 2 - Prob. 2.4PAECh. 2 - The fact that a polymer’s physical properties...Ch. 2 - One application of conductive polymers is in...Ch. 2 - Prob. 2.7PAECh. 2 - Prob. 2.8PAECh. 2 - Why is the number of protons called the atomic...Ch. 2 - 2.10 Which isotope in each pair contains more...Ch. 2 - 2.11 Define the term isotope.Ch. 2 - 2.12 Write the complete atomic symbol for each of...Ch. 2 - 2.13 How many electrons, protons, and neutrons are...Ch. 2 - 2.14 Consider the following nuclear symbols. How...Ch. 2 - 2.15 Mercury is 16.716 times more massive than...Ch. 2 - The element gallium, used in gallium arsenide...Ch. 2 - 2.17 The atomic weight of copper is 63.55 amu....Ch. 2 - The following table presents the abundances and...Ch. 2 - 2.19 Naturally occurring uranium consists of two...Ch. 2 - Prob. 2.20PAECh. 2 - Prob. 2.21PAECh. 2 - 2.22 Provide the symbol of the following...Ch. 2 - Prob. 2.23PAECh. 2 - 2.24 Identify each of the following species as an...Ch. 2 - 2.25 Write the atomic symbol for the element whose...Ch. 2 - 2.26 In what region of the periodic table are you...Ch. 2 - Prob. 2.27PAECh. 2 - Prob. 2.28PAECh. 2 - Prob. 2.29PAECh. 2 - 2.30 Using Coulomb’s law, explain how the...Ch. 2 - Prob. 2.31PAECh. 2 - 2.32 Which of the following formulas contains the...Ch. 2 - Prob. 2.33PAECh. 2 - Prob. 2.34PAECh. 2 - Prob. 2.35PAECh. 2 - 2.36 Explain the difference between a molecular...Ch. 2 - 2.37 Why are empirical formulas preferred for...Ch. 2 - 2.38 The molecular formula for the ethylene...Ch. 2 - 239 Polybutadiene is a synthetic elastomer, or...Ch. 2 - 2.40 What distinguished the work of Mendeleev that...Ch. 2 - 2.41 How does the periodic table help to make the...Ch. 2 - 2.42 What is a period in the periodic table? From...Ch. 2 - 2.43 Name of the group to which each of the...Ch. 2 - Prob. 2.44PAECh. 2 - Prob. 2.45PAECh. 2 - 2.46 Why are nonmetals important even though they...Ch. 2 - Prob. 2.47PAECh. 2 - A materials engineer has filed for a patent for a...Ch. 2 - Prob. 2.49PAECh. 2 - 2.50 A materials engineer wants to make a new...Ch. 2 - Prob. 2.51PAECh. 2 - Prob. 2.52PAECh. 2 - 2.53 What is meant by the phrase organic...Ch. 2 - 2.54 Based on what you have learned in this...Ch. 2 - 2.55 What is a functional group? How does the...Ch. 2 - Prob. 2.56PAECh. 2 - Prob. 2.57PAECh. 2 - Prob. 2.58PAECh. 2 - 2.59 The accompanying figure shows the structure...Ch. 2 - Prob. 2.60PAECh. 2 - 2.61 Name the following covalent compounds: (a)...Ch. 2 - Prob. 2.62PAECh. 2 - Prob. 2.63PAECh. 2 - Prob. 2.64PAECh. 2 - Prob. 2.65PAECh. 2 - Prob. 2.66PAECh. 2 - Prob. 2.67PAECh. 2 - 2.68 What is a free radical? How are free radicals...Ch. 2 - Prob. 2.69PAECh. 2 - 2.70 Why do you think an inhibitor molecule is...Ch. 2 - 2.71 Use the web to determine the amount of...Ch. 2 - 2.72 How can an element have an atomic weight that...Ch. 2 - 2.73 Explain the concept of a “weighted” average...Ch. 2 - 2.74 The accompanying table provides the identity...Ch. 2 - 2.75 Chlorine has only two isotopes, one with mass...Ch. 2 - Prob. 2.76PAECh. 2 - Prob. 2.77PAECh. 2 - Prob. 2.78PAECh. 2 - Prob. 2.79PAECh. 2 - 2.80 Of the following elements, which two would...Ch. 2 - 2.81 How do binary compounds with hydrogen...Ch. 2 - Prob. 2.82PAECh. 2 - Prob. 2.83PAECh. 2 - 2.84 Early attempts to arrange the elements often...Ch. 2 - 2.85 Describe how the saying “opposites attract”...Ch. 2 - 2.86 For some uses, the relative abundance of...Ch. 2 - 2.87 What is the heaviest element to have an...Ch. 2 - 2.88 Describe how you can identify the isotope, X,...Ch. 2 - Prob. 2.89PAECh. 2 - 2.90 Naturally occurring europium has an average...Ch. 2 - 2.91 Strontium has four stable isotopes....Ch. 2 - 2.92 A candy manufacturer makes chocolate-covered...Ch. 2 - Prob. 2.93PAECh. 2 - 2.94 Use a molecular level description to...Ch. 2 - 2.95 Engineers who design bicycle frames are...Ch. 2 - 2.96 Use the web to look up the density of...Ch. 2 - 2.97 LDPE has a density in the range of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- 2.95 Engineers who design bicycle frames are familiar with the densities of aluminium (2.699 g/cm3), steel (7.87 g/cm3), and titanium (4.507 g/cm3). How does this information compare with Figure 2.12, and what would it suggest for changes in this figure if more shades were used for the density colour-coding? (Iron is the principal component of steel)arrow_forward2. C12H24(I) + O2(g)arrow_forward#HH n A molecule of polyethylene has n=1000. What is the molar mass of this molecule? The atomic masses are: C 12.01 g/mol; H 1.01 g/mol.arrow_forward
- what is organic,inorganic, and physical chemistry? give 10 differences with your own wordsarrow_forwardPolymers are molecules of high molecular mass formed by joining together large numbers of small molecules, called monomers. There are two general methods of creating polymers. In addition polymerization, monomers couple through the opening of their multiple bonds, as seen in the formation of polyethylene.(Figure 1) In condensation polymerization, two monomers join by the elimination of a small molecule such as water, as seen in the formation of proteins from amino acids. (Figure 2) Figure Condensation Polymerization HRO HRO || ---H-N-C-C-0-H T H T H H < 2 of 2 Amino Acids HROHRO | | || TI -N-C-C-N-C-C--- + H₂O || -C-O-H--→ H Protein R=H, CH3, or other group of atoms Draw the monomer used to make the following polymer via addition polymerization. H H H HH 1 1 T C=C-C-C C C-C-C-C-C-C--- T T I T T H CH₂ H H H CH3 H H H CH₂ H H [] Draw the molecule by placing atoms on the grid and connecting them with bonds. ► View Available Hint(s) H 8 i ?arrow_forward2. PLEASE WRITE IT READABLEarrow_forward
- Polymers are molecules of high molecular mass formed by joining together large numbers of small molecules, called monomers. There are two general methods of creating polymers. In addition polymerization, monomers couple through the opening of their multiple bonds, as seen in the formation of polyethylene.(Figure 1) In condensation polymerization, two monomers join by the elimination of a small molecule such as water, as seen in the formation of proteins from amino acids. (Figure 2) Figure H H Addition Polymerization H H Ethylene H H HHH T T T C-C-C-C--- T HH H H Polyethylene 1 of 2 Part A The repeat unit of a polymer is the smallest section of the polymer that includes all of the original monomers and is identically repeated end to end along the entire polymer chain. Draw the repeat unit of the polymer that results via a condensation reaction, as shown in Intro figure 2, between the diacid and the diamine shown. HO Terephthalic acid + OH H₂N NH₂ 1,1-Ethanediamine To indicate that the…arrow_forwardGiven that 6.02 x 1023 ethanol molecules have a mass of 46.04 g, calculate the number of ethanol molecules in a film of ethanol that is 3.08 mm by 10.0 cm by 0.0015 mm. Assume the density of ethanol is 0.790 g/mL.arrow_forwardDraw the condensed structural formulas of stearic acid and oleic acid. You can either type out the condensed structural formula (using subscripts were approrpriate) or attach a picture of hand-drawn condensed structural formulas. Normal BIU ×=| ||† X₂|X²|→ 三: = fxe Txarrow_forward
- At first, it seemed like the poisoned Russian agent might have ingested thallium in the form of thallium(I) sulfate, a rodenticide (rat poison), not allowed in the US and Western countries but still used in other countries. Thallium leads to hair loss. It also replaces potassium in important enzymes in the brain, muscles and skin. It takes 8.0 x 102 mg of thallium ion to kill an average adult. It took a bit of investigating to figure out that the agent was actually poisoned by polonium, a radioactive element, harmful only if it goes into the body. The radioactivity emitted by polonium, alpha particles, can be stopped by skin; but, if ingested, it gets into the blood stream, travels to organs and does lots of damage. The maximum safe body amount of polonium is 7 pg (picograms!) The agent was apparently poisoned with about 10 micrograms. To provide the minimum amount of thallium to kill the average adult, how many mL of 0.45 M solution of thallium(I) sulfate needs to be ingested?…arrow_forward2. You can identify a metal by carefully determining its density. A 2.166 g piece of an unknown metal is 1.50 cm long, 0.550 cm wide, and 0.250 cm thick. What is a possible identity of the element?arrow_forwardChemistry Properties of Nylon Longest fiber of nylon: Observations of Nylon "blob": Observation of properties of nylon:arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Types of Matter: Elements, Compounds and Mixtures; Author: Professor Dave Explains;https://www.youtube.com/watch?v=dggHWvFJ8Xs;License: Standard YouTube License, CC-BY