CHEM 1100 Exam 4
What is the difference between essential and non-essential amino acids? Which can be made by the body? Which must be consumed as part of the diet?
11 amino acids are nonessential. The body can produce these amino acids. 9 amino acids are essential. The body cannot produce these and they must be consumed as part of a healthy diet.
A radioactive substance has a half-life of 4.2 days. If 100 g of the substance is present at the start, _____ grams are present after 8.4 days.
25
A representation of an alpha particle would be _____.
4 -- alpha 2
Which light bulb uses more power: one that uses 60 watts of power or one that uses 400 joules every 3 seconds?
400 joules/3 seconds = 133 watts. This is greater than 60 watts so this bulb uses more power.
What are the main components of DNA?
A backbone made up of nucleotides, a phosphorus group, and a sugar.
How is genetic engineering used to increase a plant's resistance to insects?
A gene from the bacterium Bacillus thuringiensis is spliced into the plant. This bacterium produces a protein that is toxic to certain insects. Once the gene is incorporated into the plant, the plant becomes resistant to certain insects as well.
What is a gene?
A gene is a small segment of DNA that provides instructions for making a particular protein.
How does a genetically modified organism differ from a "regular" organism?
A genetically modified organism has altered DNA
What is the purpose of performing a life cycle analysis for a particular product?
A life cycle assessment provides an idea of how much energy goes into making, distributing, selling, using and disposing of a product. By performing a life cycle assessment, a company can determine the most energy efficient and most cost effective way to make, distribute, sell and dispose of a product
What is the difference, structurally, between mono-, di- and polysaccharides?
A monosaccharide is composed of one monomer unit, a disaccharide is composed of two monomer units and polysaccharides are composed of many monomer units.
Should a polymer that is used to create the soles of shoes be made from a hydrophobic or hydrophilic polymer? Explain your answer.
A polymer used to create the soles of shoes should be made from a hydrophobic polymer so that your feet don't get wet.
What is the difference in structure between a saturated fatty acid and an unsaturated fatty acid? What is the difference in structure between an unsaturated fatty acid and a poly-unsaturated fatty acid?
A saturated fatty acid is fully hydrogenated, or has the maximum number of hydrogen atoms possible in the molecule. An unsaturated fatty acid contains double bonds and thus fewer hydrogen atoms than a saturated fatty acid. A polyunsaturated fatty acid contains multiple double bonds.
Explain why the process of manufacturing plastic is unsustainable.
A very small percent of the plastics manufactured on Earth are recycled. Millions of pounds of plastic finds its way into landfills and the ocean. As we continue to manufacture plastic, we continue to add to an evergrowing mound of plastic that does not get reused or recycled.
Which of the following types of radiation is stopped by paper? A) Alpha particles B) Beta particles C) Gamma radiation
A) Alpha particles
All simple sugars share the formula ___________. A) C6H12O6 B) CO2 C) C12H22O11 D) C5H8NO3 E) CH4
A) C6H12O6
A chain reaction: A) Is a series of fission reactions. B) Is the sequence of reactions that occurs from one half-life to another. C) Is the sequence of decay events that causes a radioactive nucleus to become non-radioactive. D) Is the method used to safely dispose of nuclear waste.
A) Is a series of fission reactions.
Electrolysis is not commonly used to create hydrogen because: A) It requires a lot of energy and is very costly B) It must be performed at high altitude C) It produces very small amounts of hydrogen D) The hydrogen that is produced cannot be further oxidized to produce energy E) None of the above
A) It requires a lot of energy and is very costly
Which of the following scientists contributed to our modern-day understanding of the atom? Choose all that apply. A) Marie Curie B) Susan Solomon D) Gloria Manney E) Richard Holmes
A) Marie Curie
Why does so much plastic waste end up in the North Pacific Ocean Gyre? A) Ocean currents travelling in difference directions pass each other and create a vortex which traps any plastic floating on the currents B) The main current from China, the world's largest producer of plastic, dumps out into the North Pacific Ocean Gyre. C) All global currents meet here so any plastic that makes its way into the ocean will be trapped here D) There are many large container boating accidents in the vicinity. Most plastic waste in the ocean comes from container ships.
A) Ocean currents travelling in difference directions pass each other and create a vortex which traps any plastic floating on the currents
The CAFE law refers to: A) The 1975 law requiring a doubling of fuel economy B) The 1965 law requiring all car owners to have insurance C) The law requiring use of non-leaded gas in cars and light trucks D) The law requiring installation of coffee and drink holders in all cars E) None of the above
A) The 1975 law requiring a doubling of fuel economy
The fuel economy of a car is: A) The distance a car can travel on a given volume of fuel. B) Higher for cars with high horsepower C) Generally higher for cars that can transport more passengers D) Lower for smaller cars E) Equivalent to the horsepower of the car
A) The distance a car can travel on a given volume of fuel.
True or False: Polymers that contain an electronegative atom in their structure tend to biodegrade more easily than those that do not. A) True B) False
A) True
A crystallite is: A) A plastic that is translucent B) A highly ordered crystalline region in a polymer C) A plastic whose shape cannot be molded D) A plastic that will not form cross-links within the structure E) All of the above
B) A highly ordered crystalline region in a polymer
The flow of electrons in a fuel cell produces A) Water B) An electric current C) Light energy D) A cathode E) None of the above
B) An electric current
Which of the following molecules would not be considered a hydrocarbon? A) C6H6 B) C2H5OH C) CH4 D) C6H14
B) C2H5OH
Which of the following molecules would boil at the lowest temperature? A) C8H18 B) C2H6 C) C4H10 D) C16H34 E) C10H22
B) C2H6
Which of the following is a greenhouse gases? A) Nitrogen B) Carbon dioxide C) Oxygen D) Helium
B) Carbon dioxide
When you eat a meal and then go out for a bike ride, this is an example of which of the following types of energy conversion? A) Solar energy being converted to food energy B) Chemical (food) energy being converted into mechanical energy C) Electrical energy being converted to mechanical energy D) Mechanical energy being converted to heat energy E) Heat energy being converted to electrical energy
B) Chemical (food) energy being converted into mechanical energy
Instructions for making a protein molecule are contained in: A) Insulin B) DNA C) RNA D) Hemoglobin E) All of the above
B) DNA
Cars with high fuel economy tend to be more powerful. A) True B) False
B) False
True or False: Chemical processes always involve the rearrangement of protons. A) True B) False
B) False
True or False: Hydrocarbon molecules are always straight chain molecules made up of carbon and hydrogen. A) True B) False
B) False
True or False: In any nuclear reaction, the number of reactant atoms of one element must match the number of product atoms for that same element. A) True B) False
B) False
True or False: It is easy to determine the likelihood of radon present in a home based on its geographical location. A) True B) False
B) False
True or False: Nuclear power plants are cleaner than coal -fired power plants. A) True B) False
B) False
True or False: Roundup is an effective weed killer for all types of weeds. A) True B) False
B) False
True or False: Since a water wheel that turns at a faster rate produces more energy than one that turns at a slow rate, we can say that power and energy are equivalent. A) True B) False
B) False
True or False: There is no conclusive evidence that Roundup has deleterious effects on human health. A) True B) False
B) False
True or False: X-rays account for the majority of radiation that most people receive during their lifetime. A) True B) False: Radon accounts for the majority of radiation that most people receive during their lifetime
B) False: Radon accounts for the majority of radiation that most people receive during their lifetime
True or False: If humans did not use fossil fuels, there would be no greenhouse effect. A) True B) False: there would still be a greenhouse effect since molecules that are naturally in the atmosphere will trap heat.
B) False: there would still be a greenhouse effect since molecules that are naturally in the atmosphere will trap heat.
Most bottled water comes from: A) Pure mountain streams B) Filtered municipal water C) Recycled waste water D) Small ponds and lakes E) Desalinated ocean water
B) Filtered municipal water
The introduction to Chapter 12 discussed floor tiles at the Simon Langton Grammar School. How is power supplied to the floor tiles at this school in England? A) Wires under the floor power them. B) Friction from footfalls on the tiles is converted to electricity. C) Each tile comes equipped with a small battery D) The tiles are connected by a special interlocking system. When one tile is disturbed, it transmits small vibrations to all the other tiles, causing them to light up.
B) Friction from footfalls on the tiles is converted to electricity.
The products of photosynthesis are: A) Carbon dioxide and water B) Glucose and oxygen C) Methane and other hydrocarbons D) Water and cellulose E) None of these
B) Glucose and oxygen
John eats a meal that does not contain a complete protein. How could be change his meal so that he consumes a complete protein? A) He can heat the food to change it into a complete protein B) He can pair it with another food to create a complete protein C) He can mix the food with raw amino acids so that a complete protein is thus manufactured D) He can consume the food with another food high in acid. The acid will break down the protein and create a set of complete proteins.
B) He can pair it with another food to create a complete protein
The Resin ID code on a plastic, numbered 1 through 6: A) Gives an indication of how many polymers are contained in the plastic B) Indicates how easily recycled each plastic is C) Indicates how many new polymers can be created from the plastic D) Indicates how many years ago the plastic was manufactured E) Tells you how many times the plastic has been remolded
B) Indicates how easily recycled each plastic is
Polylactic acid is not easily recycled because: A) It is made from straight chain polymers. B) It must be degraded into its monomers when it is recycled. C) It is a thermosetting polymer. D) It contains electronegative atoms. E) None of the above
B) It must be degraded into its monomers when it is recycled.
If a piece of plastic waste is not recycled and it doesn't make its way to a landfill or waterway, (river, lake, ocean, stream, etc.) what is its most likely fate? Assume that it is disposed of and not left on the side of a road or carelessly discarded. A) It will break down into small enough pieces that are not visible to the naked eye B) It will be incinerated C) It will be put outside so that the sun can melt it D) It will be stored until future generations come up with a way to re-use it more efficiently than present methods allow
B) It will be incinerated
The prefix poly- means: A) Not B) Many C) Quickly D) Plastic E) None of these
B) Many
Complex carbohydrates are composed of what type of saccharide? A) Glucose B) Polysaccharides C) Fructose D) Maltose E) Monosaccharides
B) Polysaccharides
A natural form of radiation is: A) The radiation we receive from medical X-rays B) Radon C) Radio waves D) Radiation from lead pipes E) All of the above
B) Radon
The purpose of an oil refinery is: A) To clean the debris out of crude oil B) To separate the oil based on how many carbon atoms are in each component C) To convert all the oil into gasoline that can be used in vehicles D) To remove sulfur from the oil, which is a contaminant E) None of the above
B) To separate the oil based on how many carbon atoms are in each component
What are the two main genetic modifications that are frequently used in modern agriculture, according to your text? A) Resistance to bruising and drought resistance B) Tolerance to herbicides and resistance to insects C) Temperature fluctuation tolerance and drought resistance D) Tolerance to herbicides and high soil salt content E) Resistance to insects and high UV light
B) Tolerance to herbicides and resistance to insects
Radioactive atoms: A) Will glow in a dark room B) Will release energy or particles when their nuclei undergo reactions C) Will have a given number of protons and neutrons that will not change over time D) All of the above
B) Will release energy or particles when their nuclei undergo reactions
During the 1700s and 1800s, the primary source of energy in the United States was: A) Whale fat B) Wood C) Natural gas D) Coal E) Hydroelectric power
B) Wood
The earth has been getting noticeably warmer since: A) the 1980s B) the 1890s C) the 1950s D) 400,000 years ago E) 1 million years ago
B) the 1890s
When an atom of uranium undergoes fission to make two new atoms one of these is _____ and the other is______.
Barium-142 and Krypton-91.
What determines the physical properties of a particular polymer?
Both the type of monomers it contains and how these monomers are arranged or joined together to make the polymer.
About what percentage of the plastic made around the world each year winds up in the ocean? A) 10 B) 15 C) 20 D) 30 E) 50
C) 20
A thermoplastic polymer: A) Is a polymer that, once heated to high temperatures, cannot be remolded into a new shape B) Is always rigid and inflexible C) Can be heated to become pliable and then remolded into a new shape D) Contains high numbers of crystallites that make the plastic inflexible E) Is made of the polymer Bakelite
C) Can be heated to become pliable and then remolded into a new shape
What are the two main elements found in all fossil fuels? A) Phosphorus and sulfur B) Oxygen and nitrogen C) Carbon and hydrogen D) Silicon and aluminum E) Carbon and oxygen
C) Carbon and hydrogen
Polyisoprene is the primary component of natural rubber and is also used to make: A) Nylon leggings B) Sunglass frames C) Chewing gum D) Contact lenses E) All of the above
C) Chewing gum
What is used to ensure that a nuclear reaction in a power plant does not overheat the reactor core? A) A wind turbine B) A chain reaction C) Control rods D) The cooling tower E) All of the above
C) Control rods
The Richter scale measures the magnitude of_________. It ranges from 1 to ____. A) Tsunamis, 5 B) Nuclear accidents, 6 C) Earthquakes, 10 D) Hurricanes, 20
C) Earthquakes, 10
______ is/are a good source of protein if meat, dairy, eggs, nuts, legumes or soy are lacking. A) Vegetables B) Citrus fruit C) Insects D) Potatoes E) None of the above
C) Insects
A food that is considered an incomplete protein: A) Contains only plant based foods B) Does not contain any meat C) Lacks one or more essential amino acids D) Contains only nonessential amino acids E) All of the above
C) Lacks one or more essential amino acids
A photovoltaic cell converts: A) Chemical bond energy into electrical energy B) Chemical bond energy into mechanical energy C) Light energy into electrical energy D) Chemical bond energy into solar energy E) Mechanical energy into heat energy
C) Light energy into electrical energy
Another word for fat is a five letter word. This word is ___________. A) Ionic B) Crust C) Lipid D) Argon E) Trans
C) Lipid
The only major class of biomolecules that is not a polymer is: A) Carbohydrates B) Proteins C) Lipids D) Nucleic acids
C) Lipids
Which of these polymers melts the most readily? A) HDPE B) PVC C) PET D) Polystyrene E) Polypropylene
C) PET
The number 36 represents the number of ________ in this element: A) Electrons B) Neutrons C) Protons D) Neutrons plus protons E) Protons plus electrons.
C) Protons
According to Figure 14.16 in your text, what crop in the U.S. has the highest percentage of acres of genetically modified plants? A) Cotton B) Corn C) Soy D) Wheat E) Tomatoes
C) Soy
Radon that is found in many homes comes from: A) The breakdown of nuclear waste that is continually being transported across the country B) Ultraviolet radiation entering the home through windows and skylights C) The decay of uranium in rocks under or near the home D) The decomposition of compounds used in dry cleaning that are prevalent in most homes
C) The decay of uranium in rocks under or near the home
What new safety law caused Henry Ford to worry that enforcement of such a law would cause his company to shut down? A) The law requiring all cars to have roofs B) The headlight law C) The safety belt law D) The law requiring doors to open back to front, as they do today E) The law requiring an increase in fuel economy
C) The safety belt law
Is this statement true or false? Explain. "Sustainability is a way to use products in a linear fashion." A) This statement is true. Sustainable processes use all items in a process (using all items is said to be using them in a linear fashion.) B) This statement is true. Sustainable processes use and produce products in a step-by-step way, or in other words, linearly. C) This statement is false. Sustainable processes re-use items so that the process is considered to be circular, not linear.
C) This statement is false. Sustainable processes re-use items so that the process is considered to be circular, not linear.
In a fuel cell, oxygen molecules are converted to: A) Hydrogen molecules B) Oxygen atoms C) Water molecules D) Electrons E) None of these
C) Water molecules
Which one of the following is a unit for power? A) Joule B) Calorie C) Watt D) Meter E) Torr
C) Watt
Which one of the following would stay closest to the bottom of a fractionating column? A) Methane B) Gasoline C) Wax D) Diesel oil E) Kerosene
C) Wax
Explain why the development of GMO citrus fruits may be beneficial.
Citrus fruits are being infected with a bacterium that causes the fruit to turn green and taste bitter. Genetic engineering may one day be able to produce oranges and other citrus with resistance to the citrus-greening bacterium. If not, the bacterium affecting global orange crops may make orange juice a thing of the past.
Explain the term cradle-to-grave analysis.
Cradle-to-grave analysis refers to tracking a product from the time it is produced to the time that it is no longer used.
Which of the following products is NOT made from a thermoplastic polymer? A) Plastic dinnerware B) Cell phone cases C) Contact lenses D) A phone made of Bakelite E) A plastic chair
D) A phone made of Bakelite
Which of the following will block gamma radiation? A) Paper B) Skin C) Aluminum D) A thick piece of lead E) None of the above
D) A thick piece of lead
A car's power is usually expressed in which of the following units? A) Joules B) Calories C) Watts D) Horsepower E) Grams
D) Horsepower
In addition to a hydrocarbon, what substance must be present in a combustion reaction? A) Nitrogen B) Carbon dioxide C) Water D) Oxygen E) All of the above
D) Oxygen
Which of the following foods is not a complete protein? A) Quinoa B) Soy C) Eggs D) Peanut butter E) Steak
D) Peanut butter
The average person receives the majority of his/her radiation in the form of ____ each year. A) X-rays B) Sunlight C) Nuclear medicine D) Radon E) Rocks and soil
D) Radon
Which city recycles the most plastic per capita? A) New York City B) Washington, D.C. C) Seattle D) San Francisco E) Los Angeles
D) San Francisco
Elements in which part of the periodic table are MOST likely to be radioactive? A) The upper right B) The upper left C) The upper middle D) The very bottom E) The lower left
D) The very bottom
The majority of electrical energy that goes into lighting a light bulb does not produce light energy. Instead it produces: A) Nuclear energy B) Mechanical energy C) Chemical energy D) Thermal energy E) Solar energy
D) Thermal energy
Which of the following type of fat is the least healthy? A) Saturated fat B) Monounsaturated fat C) Polyunsaturated fat D) Trans fat
D) Trans fat
Which 19th century scientist is credited with the discovery of X-rays? A) Marie Curie B) Otto Hahn C) Lise Meitner D) Wilhelm Rontgen
D) Wilhelm Rontgen
According to the MyPlate dietary guidelines, what portion of one's plate should be composed of fruits and vegetables? A) 1/8 B) ¼ C) 1/3 D) ½ E) ¾
D) ½
Explain the statement "People are either going to drink transgenic orange juice or they're going to drink apple juice."
Due to the bacterium attacking citrus groves, transgenic citrus must be developed or we risk losing all citrus trees to the disease carried by the Asian citrus psyllid. If transgenic citrus is not developed, people may be forced to drink other juices than orange juice.
Why do nuclear equations that involve beta decay appear to be unbalanced?
During beta decay a neutron is converted into a proton and an electron.
Which of the following can be made from recycled plastics? A) Clothing B) Buildings C) Paint D) Toothbrushes E) All of the above
E) All of the above
Every amino acid contains: A) Carbon, nitrogen and oxygen and sulfur B) Carbon, phosphorus and sulfur C) Carbon, a benzene ring and two oxygen atoms D) At least two carbon atoms, two nitrogen atoms and six hydrogen atoms E) Carbon, nitrogen and oxygen and hydrogen
E) Carbon, nitrogen and oxygen and hydrogen
Which of the following sources of energy showed the greatest increase from 1900 to 2012? A) Coal B) Solar energy C) Wind energy D) Hydroelectric energy E) Petroleum
E) Petroleum
What part of a nuclear power plants contains the fissionable material? A) The cooling tower B) The control rods C) The transformer D) The turbine E) The containment building
E) The containment building
Two functions of fat in the body are:
Energy storage and insulation
Has a device ever been created that produces more energy than it creates? Why or why not?
Even though many patents exist for such a device, one has never been created. The first law of thermodynamics states that energy cannot be created or destroyed.
Which of the following are functions of protein in the body? A) Structural component of skin and nails B) Antibodies C) Enzymes D) Hormones E) Hemoglobin F) All of the above
F) All of the above
Which of the following are products made from recycled plastics? Circle all that apply. A) Fleece jackets B) Buildings C) Paint D) Carpet E) Sneaker F) All of the above
F) All of the above
Explain if the following statement is true or false: If we reduce our carbon emissions immediately, climate change will be quickly reversed.
False. Even if we reduce our carbon emissions right away, climate change will continue for hundreds or thousands or years.
Explain the basic steps in protein synthesis.
First a DNA strand unwinds. Through the process of transcription, a strand of RNA that is complementary to the DNA strand is created. RNA is the template used for protein synthesis. Each three bases of RNA code for a particular amino acid. Amino acids are formed, and each new amino acid adds to the chain of amino acids which will form the protein.
Carbon dioxide in the atmosphere traps heat from the sun and makes life on Earth possible. Why then should we be concerned about adding carbon dioxide to the atmosphere if it is a natural occurrence and beneficial to life on Earth?
For 650,000 years CO2 never exceeded 300 ppm in the atmosphere. In 1950 it exceeded this level and has not been below 300 ppm since.
Explain why fuel cells are not in common use.
Fuel cells rely on hydrogen. Hydrogen is difficult to produce and store. Using electrolysis to produce hydrogen is very costly.
How many years will it take for 100 g of a radioactive substance whose half-life is 200 years to decay to less than 1 g of radioactive material? A) 200 years: 50 g B) 400 years 25 g C) 600 years 12.5 g D) 800 years 6.25 g E) 1000 years 3.13 g F) 1200 years 1.56 g G) 1400 years 0.78 g
G) 1400 years 0.78 g
Which of the following is a fossil fuel? A) Wood C) Coal D) Nuclear energy E) Solar energy G) Petroleum
G) Petroleum
Explain the difference between global warming and climate change.
Global warming is just one aspect of climate change. Other components of climate change include rising sea levels, melting glaciers, changing ecosystems and a variety of other changes.
What is the North Pacific Ocean Gyre?
It is an area of the Pacific Ocean that moves in a clockwise direction. It is also an area of the ocean where many ocean currents meet. Due to these factors, much of the trash that enters the ocean ends up in this gyre.
What does the word "plastic" mean?
It means capable of change.
Explain why linear polymers tend to be more rigid and resistant to external influences than branched polymers.
Linear polymer can stack more tightly together than branched polymers and the strands of individual polymer will interact more with one another than the strands of a branched polymer.
The greenhouse effect is due to _____.
Molecules in the atmosphere that can trap outgoing radiation
Does one particular polymer only contain one type of monomer? Provide examples to explain your answer.
No, for example polysaccharides are made up of the monomer glucose but no other monomers. Proteins, on the other hand, are polymers that are made up of different amino acids. Polymers may or may not contain different monomers.
Who was awarded the Nobel Prize in Chemistry in 1944? Was this person solely responsible for the discovery of fission?
Otto Hahn was awarded the Nobel Prize in Chemistry in 1944. No, Lise Meitner and Fritz Strassmann also worked on this research.
Paper cups have a much lower carbon footprint than plastic cups. Which of these has the higher water footprint?
Paper cups have a higher water footprint.
An atom of Ytterbium, Yb undergoes fission and forms two atoms, one of which is Sb, antimony. The other atom that forms is _____.
Potassium (70-51=19)
What are two solutions that would make the production and use of plastics more sustainable?
Producing less plastic or producing biodegradable plastic would make this a more sustainable process, though it will never be wholly sustainable.
What are three examples of polymers that are not manufactured in a laboratory?
Proteins, some carbohydrates, natural rubber
The enzyme_________begins the process of carbohydrate digestion. This process begins in what part of the body?
Salivary amylase, in the mouth
Organize the steps of a municipal recycling program from start to finish: chipping/flaking, washing/sterilization, separation, melting/reforming
Separation, chipping/flaking, washing/sterilization, melting/reforming
What are some examples of climate change that are happening across the globe?
Shrinking glaciers, thinning of Arctic sea ice, rising sea levels.
Hydrogen powered cars are always a greener option than gasoline powered cars. Explain whether this statement is valid or not.
Since it requires large amounts of energy to produce the hydrogen used in hydrogen powered cars, they may be a dirtier option than gasoline cars because large amounts of coal or other fossil fuels would have to be used to create electricity to form the hydrogen that is used in a hydrogen car.
What are three common crops in the U.S. that have been genetically modified?
Soy, cotton and corn
Sugars are composed of what type of saccharide(s)?
Sugars are composed of monoand disaccharides
If you put a cracker in your mouth and leave it there for a few minutes, it begins to taste sweet. Explain why this is so.
The cracker contains polysaccharides. When it is exposed to the salivary amylase in your mouth, the polysaccharides in the cracker start to get broken down into the sweeter mono and disaccharides, causing the sweet taste.
How is the cradle-to-grave approach different from the cradle-to-cradle approach for product design?
The cradle-to-cradle approach incorporates plans for reusing a product, instead of just assuming that the product will end up in a landfill, which is often the case in the cradle-to-grave approach.
What was the seemingly insurmountable challenge that cities in the 1800s faced, and how was it solved?
The huge amounts of horse dung that were accumulating in cities around the world. Streetcars and automobiles were introduced, so horse dung became less and less of a problem.
Hydrocarbons with more carbon atoms tend to have higher boiling points because:
The more carbon atoms in a molecule, the more surface area a molecule has. The higher surface area allows a molecule to interact more with its neighboring molecules. The more interactions that occur between neighboring molecules, the more difficult it will be for individual molecules to break away from each other. Higher temperatures will be required to disrupt these interactions, resulting in higher boiling points.
What are some possible uses of an old, discarded Nike sneaker, as described in your text?
The sneaker can be dismantled, ground up and used in other footwear, for the surface of sport courts, fields, tracks, or playground surfaces.
How is a transgenic organism different from a genetically modified organism?
They are the same
Explain the term biodegrade.
When something bio-degrades it breaks down naturally into smaller and smaller pieces.
Proteins are made up of a chain of ____________ joined together with a __________bond.
amino acids; peptide
In a fractionation column, hydrocarbons with the _________boiling point will move the _________ in the fractionating column.
lowest; highest
Which of the following are considered macronutrients? Which are considered micronutrients? A) Protein _____ B) Vitamins _____ C) Minerals _____ D Fats _____ E) Carbohydrates _____
macronutrient; micronutrient; micronutrient; macronutrient; macronutrient