Which is composed of aromatic hydrocarbons?clothingbarbeque fuelpain relieverspolyvinyl chloride
Answers
Aromatic hydrocarbons are organic compounds that contain one or more benzene rings in their structure. These compounds are characterized by their strong, pleasant odor, which is why they are called aromatic. They are commonly found in petroleum products and are often used as feedstock for the production of chemicals and fuels.
Out of the options given, clothing and polyvinyl chloride do not contain aromatic hydrocarbons. On the other hand, barbecue fuel and pain relievers can contain aromatic hydrocarbons.
Barbecue fuel, also known as charcoal briquettes, is made from compressed charcoal dust mixed with a binding agent. The charcoal is made by heating wood in the absence of oxygen to remove the moisture and other impurities. The resulting charcoal contains a high concentration of aromatic hydrocarbons, which gives it its characteristic smell and helps it burn efficiently.
Pain relievers, such as aspirin and ibuprofen, are also known to contain aromatic hydrocarbons. These compounds are used in the synthesis of these drugs as intermediates, and traces of them can be present in the final product. However, the levels are generally low and not considered harmful to health.
In summary, barbecue fuel and pain relievers can contain aromatic hydrocarbons, while clothing and polyvinyl chloride do not. It is important to note that exposure to high levels of these compounds can be harmful to health, and precautions should be taken to minimize exposure.
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Answer: b
Explanation: because i just took the quiz
Related Questions
Which is most likely true about electronegativity?
Answers
Answer:
it intends to increase to be the same across a period
A gas at a volume of 10 L is at a pressure of 2 atm. The volume increases to 50 L. What is new?
Answers
Considering the Boyle's law, if the volume increases to 50 L, the new pressure is 0.4 atm.
Definition of Boyle's lawBoyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: If the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.
Mathematically, Boyle's law states that if the amount of gas and the temperature remain constant, the product of the pressure and the volume always has the same value:
P× V= k
where
P is the pressure.V is the volume.k is a constant.Considering an initial state 1 and a final state 2, it is fulfilled:
P₁× V₁= P₂× V₂
New pressureIn this case, you know:
P₁= 2 atmV₁= 10 LP₂= ? V₂= 50 LReplacing in Boyle's law:
2 atm× 10 L= P₂× 50 L
Solving:
(2 atm× 10 L)÷ 50 L= P₂
0.4 atm= P₂
Finally, the new pressure is 0.4 atm.
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Next, click the glass layers tab in the black bar at the bottom of the simulation. use the arrow in the options field on the right to add one or more glass panes. this simulation shows how different photons would react to a layer of glass surrounding earth, much like an actual greenhouse. how do the sunlight photons and infrared photons react differently to the glass layer(s)?
Answers
The visible light photons pass through the glass unaffected. However, the infrared photons that Earth reflects often change direction or are absorbed back into Earth’s surface when they interact with the glass.
Visible light from the Sun arrives at the top of Earth's atmosphere. As the light enters the atmosphere, some of it is scattered by air molecules or reflected from white clouds back into space.
Since air is mostly transparent to visible light, much of the light that isn't reflected back into space goes through the atmosphere to Earth's surface.
These infrared photons move upward from the surface through the atmosphere. Here's where the greenhouse effect comes in.
The atmosphere, which is mostly transparent in visible light wavelengths, is definitely not transparent at infrared wavelengths. A small amount of the upward flowing IR shoots directly out into space, but the majority of it is absorbed by the atmosphere.
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Answer:
The visible light photons pass through the glass unaffected. However, the infrared photons that Earth reflects often change direction or are absorbed back into Earth's surface when they interact with the glass.
Explanation:
Edmentum
Which of the following are thought to be key requirements for a world to have life?- a source of energy to fuel metabolism- a source of molecules from which to build living cells- a liquid medium
Answers
The following are thought to be key requirements for a world to have life: A source of energy to fuel metabolism, A source of molecules from which to build living cells, A liquid medium, These are the primary requirements for a world to have life. These requirements are key to the development and sustainability of life on Earth.
Every living organism requires energy to survive, and this energy comes from a variety of sources, including sunlight, food, or chemical reactions. It's necessary to have a source of energy to fuel metabolism, as it helps with the growth, development, and reproduction of an organism. A source of molecules from which to build living cells
These molecules can include things like amino acids, sugars, and lipids. A liquid medium is essential for life because it provides an environment in which chemical reactions can occur. Most chemical reactions require water to proceed, and water is also the medium in which cells operate. This is why water is considered to be the universal solvent and is an essential component for life on Earth.
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oxalic acid (h2c2o4) has a ka of 5.9×10−2, while the hydrogen oxalate anion (hc2o−4) has a ka of 6.1×10−5. is an aqueous solution of a hydrogen oxalate salt (e.g. nahc2o4) acidic, basic, or neutral?
Answers
Hydrogen oxalate anion has acidic nature.
A more detailed explanation of the answer.
An aqueous solution of a hydrogen oxalate salt (e.g., NaHC2O4) would be acidic. To determine this, we can compare the Ka values of oxalic acid (H2C2O4) and hydrogen oxalate anion (HC2O−4).
Step 1: Identify the Ka values
Oxalic acid (H2C2O4) has a Ka of 5.9×10⁻².
Hydrogen oxalate anion (HC2O−4) has a Ka of 6.1×10⁻⁵.
Step 2: Compare the Ka values
Since the Ka of oxalic acid is greater than the Ka of the hydrogen oxalate anion, it means that oxalic acid is a stronger acid than the hydrogen oxalate anion is a weak acid.
Step 3: Determine the nature of the solution
In an aqueous solution of NaHC2O4, the hydrogen oxalate anion (HC2O−4) will partially ionize to produce H+ ions, making the solution acidic. Since the hydrogen oxalate anion is the only species contributing H+ ions to the solution, the overall nature of the solution will be acidic.
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At the completion of work, you should _______________ the problem and solution and _______________ up with the customer to verify satisfaction.
Answers
At the completion of work, you should analyze the problem and solution and follow up with the customer to verify satisfaction.
1. Analyze the problem: Once you have completed the work, take some time to evaluate the problem you were trying to solve. Consider whether the solution addressed the problem effectively and if any additional steps or adjustments are needed.
2. Analyze the solution: Next, assess the solution itself. Determine if it achieved the desired outcome and if it met the requirements and expectations set by the customer. Consider if there are any areas for improvement or if any changes need to be made.
Remember, this process is crucial for maintaining good customer relationships and ensuring that the work you have done is effective and satisfactory. It allows you to make any necessary adjustments or improvements based on feedback and ensures that the customer's needs are met.
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PLEASE help — I’m failing!
Determine each of the following for a 4.23 x 10-3 M solution of HCl:
a. H3o+
b. OH-
c. pH
d. pOH
Answers
Answer:
a.
\([H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M\)
b.
\([OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M\)
c.
\(pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37\)
d.
\(pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63\)
To what final volume in L should 380mL of a 0.47M solution be diluted if you want a final concentration of 0.094M?
Answers
ANSWER
The final volume of the solution is 1900mL
EXPLANATION
Given information
The initial volume is 380mL
The initial concentration is 0.47M
The final concentration is 0.094M
To find the final volume of the solution, follow the steps below
Step 1: Write the dilution formula
\(\begin{gathered} \text{ C1V1 = C2V2} \\ \text{ Where} \\ \text{ C1 = initial concentration} \\ V1\text{ = Final volume} \\ \text{ C2 = initial concentration} \\ \text{ V2 = Final concentration} \end{gathered}\)Step 1: Substitute the given data into the formula in step 1
Let the final volume be V2
\(\begin{gathered} \text{ 0.47 }\times\text{ 380 = 0.094}\times V2 \\ 178.6\text{ = 0.094}\times\text{ V2} \\ \text{ Divide both sides by 0.094} \\ \text{ }\frac{178.6}{0.094}\text{ = }\frac{0.094\times V2}{0.094} \\ \text{ V2 = 1900mL} \end{gathered}\)Hence, the final volume of the solution is 1900mL
I NEED HELP ASAP PLEASE HELP!!!
1)Calculate the pH of a 0. 03 M solution of nitric acid.
2)Calculate the hydronium ion concentration of a sulfuric acid solution with a pH of 5. 43.
3)Calculate the pOH of a 0. 025 M solution of sodium hydroxide.
4)Calculate the pH of a 0. 002 M solution of lithium hydroxide
Answers
pH = -log[H+]
where [H+] is the concentration of hydronium ions in the solution.
Since nitric acid is a strong acid, it completely dissociates in water to form H+ ions and NO3- ions. Therefore, the concentration of H+ ions in a 0.03 M solution of nitric acid is also 0.03 M.
Substituting this value into the formula, we get:
pH = -log(0.03) ≈ 1.52
Therefore, the pH of a 0.03 M solution of nitric acid is approximately 1.52.
2) The hydronium ion concentration of a sulfuric acid solution with a pH of 5.43 can be calculated using the formula:
pH = -log[H+]
where [H+] is the concentration of hydronium ions in the solution.
Substituting the given pH value into the formula, we get:
5.43 = -log[H+]
Taking the antilogarithm of both sides, we get:
[H+] = 10^(-5.43)
[H+] ≈ 2.15 x 10^(-6) M
Therefore, the hydronium ion concentration of the sulfuric acid solution is approximately 2.15 x 10^(-6) M.
3) The pOH of a 0.025 M solution of sodium hydroxide can be calculated using the formula:
pOH = -log[OH-]
where [OH-] is the concentration of hydroxide ions in the solution.
Since sodium hydroxide is a strong base, it completely dissociates in water to form Na+ ions and OH- ions. Therefore, the concentration of OH- ions in a 0.025 M solution of sodium hydroxide is also 0.025 M.
Substituting this value into the formula, we get:
pOH = -log(0.025) ≈ 1.60
Since pH + pOH = 14, we can calculate the pH of the solution as:
pH = 14 - pOH = 14 - 1.60 ≈ 12.40
Therefore, the pH of a 0.025 M solution of sodium hydroxide is approximately 12.40.
4) The pH of a 0.002 M solution of lithium hydroxide can be calculated using the formula:
pH = 14 - pOH
where pOH is the negative logarithm of the hydroxide ion concentration [OH-].
Since lithium hydroxide is a strong base, it completely dissociates in water to form Li+ ions and OH- ions. Therefore, the concentration of OH- ions in a 0.002 M solution of lithium hydroxide is also 0.002 M.
Substituting this value into the formula, we get:
pOH = -log(0.002) ≈ 2.70
Therefore, the pH of a 0.002 M solution of lithium hydroxide is approximately:
pH = 14 - pOH = 14 - 2.70 ≈ 11.30
Classify each statement as an observation, a law, or a theory. Drag the appropriate items to their respective bins
Answers
Classify each statement as an observation, a law, or a theory.
Drag the appropriate items to their respective bins.:
(A): Neon does not react with sodium at room temperature and pressure.
(B): Chlorine reacts violently with sodium at room temperature and pressure.
(C): If elements are listed in order of increasing mass of their atoms, their chemical reactivity follows a repeating pattern.
(D): The reactivity of elements depends on the arrangement of their electrons.
Observation: (A), (B)
Law: (C)
Theory: (D)
The statement given for law and theory were wrong. But of observation is correct.
From the given data,
Observation:Neon is inert gas.
Chlorine is highly reactive gas.
This can be said that Neon belongs to group 18 which have stable configuration.
While, chloride require one electron to get stable configuration of noble gas. They are electronegative in nature. Therefore, it is highly reactive in nature.
LawIf the element are listed in order of increasing mass of their atom their chemical reactivity follows a repeating pattern.
TheoryThe reactivity of element depends on the arrangements of their electrons.
Thus, we concluded that the statement given for law and theory were wrong.
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Do you think your skin is polar or non-polar? Explain.
Answers
Answer:
hope it helps
Explanation:
It is polar. That is why water sticks to your skin, unlike wax, a nonpolar substance.
1) Which of the following reactions is most likely to have a positive ASsys? (System refers to the reaction.)
a. SiC(s) + 2CO(g) → SiO2(s) + 3C(s)
b. 6CO2(g) + 6H2O(g) → C6H12O6(aq) + O2(g)
c. CO(g) + Cl2(g) → COCl2(g)
d. 2HNO3(1) + NO(g) + 3NO2(g) + H2O(1)
Answers
Answer:
D
Explanation:
Of the four given equations, we want to determine which will most likely have a positive ΔS.
A positive ΔS indicates an increase in entropy. Recall that entropy can be described as the "randomness" of a substance. Therefore, gases have the highest entropy, followed by liquids and solids.
Examining each answer choice:
A is unlikely to have a positive ΔS, as gases are being converted into solids. As a result, entropy is lowered. B is likewise unlikely to have a positive ΔS. Multiple moles of gases are being converted into solution and another gas, leading to a decrease in "randomness."While all species involved in C are gases, we can see that two moles of gases react to form only one. Because the amount of gases decrease as the reaction proceeds, the amount of "randomness" likewise decreases, indicating a decrease in entropy. D is the best answer. One mole of gas reacts to form three moles of gas, thereby increasing "randomness" and hence increasea entropy.List three ways that energy could be lost between water and food
Answers
Work allows energy to be transferred from one object to another. To do work, an agent must exert a force on an object over a long distance.
When work is done, energy is transferred from the agent to the object, resulting in a change in the motion of the object (more specifically, a change in the object's kinetic energy).
What is energy?
Energy is essential to human society and has numerous health benefits. However, each energy source poses some health risks. This article examines the health consequences of each major source of energy, focusing on those with the greatest global impact on disease burden. The harvesting and burning of solid fuels, coal, and biomass have the greatest health consequences, primarily in the form of occupational health risks and household and general ambient air pollution. In the world's poorest households, a lack of access to clean fuels and electricity poses a particularly serious health risk. Although energy efficiency has many advantages, energy use is essential to human society and has numerous health benefits.
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In the box below, draw the open-chain structure (as a Fischer projection) of 2-deoxy-D-glucose. You may draw your Fischer projection without using wedged or hashed bonds. Align the Fischer projection vertically, e.g. Show explicitly the bonds to any hydrogens attached to chiral carbons. Do not show bonds to other hydrogens. A start structure for you modify is provided in the sketcher.
Answers
Below is an example of the open-chain structure (as a Fischer projection) of 2-deoxy-D-glucose.
The Fischer projection should be aligned vertically, with the carbon atoms at the top and bottom and the oxygen atoms on the left and right. The chiral carbon atoms should be labeled and any hydrogens attached to them should be explicitly shown. Note that bonds to other hydrogens should not be shown.
O O | /| | / | | H | H | H | | H | | H | | H | H | H | | H | |H | C--C--C--C--C
The diagram provided is a Fischer projection of 2-deoxy-D-glucose. The vertical alignment of the carbon atoms at the top and bottom, and the oxygen atoms on the left and right is correct. The chiral carbon atoms should be labeled and any hydrogens attached to them should be explicitly shown. Note that bonds to other hydrogens should not be shown.
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if someone were to dump chemicals into a dry river what would happen to those chemicals
Answers
The exact outcome of dumping chemicals into a dry river depends on several factors, including the type and amount of chemicals, the condition of the riverbed and surrounding environment, and the weather conditions.
In general, chemicals that are dumped into a dry river may evaporate, leach into the soil and groundwater, or become trapped in the riverbed. If the chemicals are toxic, they may have negative impacts on the environment, including killing plants and animals, contaminating soil and water, and potentially affecting the health of humans and other species that come into contact with the chemicals or consume contaminated water or food. In some cases, the chemicals may cause chemical reactions with the soil or other substances in the riverbed, potentially leading to fire or explosion. If the chemicals are flammable or reactive, they may also pose a danger to the public and emergency responders.
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How does one recognize a periodic trend on the periodic table?
O A. Find elements in random positions of the periodic table.
B. Look for predictable changes and patterns.
O C. Look for all elements with 2 electrons in
any orbital.
D. Compare an element's properties to the properties of a noble gas.
Answers
Answer:
B. Look for predictable changes and patterns.Explanation:
Answer:
B
Explanation:
NaC2H3O2 product or reactant
Answers
Answer:
the reaction between vinegar and baking soda, the reactants are vinegar (acetic acid) and baking soda (sodium bicarbonate). The products are sodium acetate, water, and carbon dioxide gas.
20. What are the metals in the center of the periodic table referred to as?
Answers
The metals in the center of the periodic table are called transition metals. There are 38 transition metals in total.
Answer:
They are called transition metals.
use the periodic table to select the element that best fits each of the following descriptions. which element below has properties of both metals and nonmetals?
zinc aluminum copper boron
Answers
Answer: Boron is the element which has properties of both metals and nonmetals.
Explanation:
Metals are defined as the elements which loose electrons to attain stable electronic configuration. They attain positive charge and form cation. Example: Zinc (Zn), Aluminium (Al) , copper (Cu)
Non-metals are defined as the elements which gain electrons to attain stable electronic configuration. They attain negative charge and form anion. Example: Chlorine (Cl) , Sulphur (S)
Metalloids are defined as the elements which show properties of both metals and non-metals. There are 7 metalloids in the periodic table. They are Boron (B) , Silicon (Si) , Germanium (Ge) , Arsenic (As) , Antimony (Sb), Tellurium (Te) and Polonium (Po).
Thus boron is the element which has properties of both metals and nonmetals.
Answer:
The answer is A boron!!!!!!
Explanation:
i took the quiz on ed
Name main factors that affect on rates of chemical reaction
write in your own words, please. Don't copy-paste from the internet, please.
Answers
Answer:
There are four main factors that can affect the reaction rate of a chemical reaction:
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
The ratio of boys to girls at a school
dance is shown in the graph.
0
1
2
3
4
5
6
7
8
9
123456789
Number of Girls
Number of Boys
x
y
Which equation has a greater rate
of change than the rate shown in
the graph?
a. y 5 __
1
5 x
b. y 5 __
1
7 x
c. y 5 __
2
9 x
d. y 5 __
2
3 x
Answers
Answer:
Si tú puedes 1-2-3-4-5-6-7-8-9-10 eso debes de ser más bien dicho sacaran Club Ojalá que te ayude Chau
Explanation:
de Ojalá que te ayude No te olvides de sacar todas las preguntas esas lo que tú dijiste y si tú promoción 123 saquen globo que quieras tú
Please help me out ........
Answers
Answer:c
Explanation:
According to the picture above, which layer contains :
Answers
Answer:
a) layer 4
b) layer 1
Explanation:
Older the layer=older the fossils
Newer the layer=newer the fossilss
1. Why do plant cells have a cell wall in addition to a cell membrane?
2. Think about the function of chloroplasts. Would you expect to find
more chloroplast in the cells of leaves or the roots of a plant?
3.What two cell structures do protists have that bacteria do not?
4. Do all microbes cause disease? Explain
Answers
Answer:
Plant cells have a cell wall and chloroplasts; animal cells do not have either of these structures.
Explanation:
A major difference between a plant cell and an animal cell is presence of chloroplasts in plant cells. Another key difference between plant and animal cells is the presence of a cell wall in plant cells. Both structures are absent in an animal cells.
The cell wall surrounds the plasma membrane of plant cells. This helps to provide the required tensile strength and protection against mechanical and osmotic stress.
Cell walls also help plants to maintain shape and rigidity.
Answer:
1) Plant cells have a cell wall to strengthen the cell
2) Chloroplasts are the site of photosynthesis (turning light energy in sugar) so there would eb a lot more in the leaves that get sunlight than the roots which are underground and receive no sunlight
3) Mitochondria and nucleus
4) No. Some microorganisms are useful to humans, such as the bacteria that create yoghurt, or fungi such as penicillin which are antibiotics, which help us fight bacterial infections
3. Predict Suppose the chef used two silver
pans instead, but one was three times the
mass of the other. How would the energy
change of the two pans compare?
Answers
The specific heat capacity of a substance is the amount of heat needed to elevate it by 1 degree kelvin per gram. The easier it is for something to heat up, then, the smaller the heat capacity. We would suppose that a cook in a hurry would want a pan that heats up more quickly and would choose one with a lesser heat capacity.
What would be the difference in the two pans' energy changes?0.385 for copper and 0.900 for aluminum.
Despite using non-SI units, we can still compare using it. It is obvious to him that copper has a lower specific heat, so he will pick that.
In case you're curious, you can also approach this issue from the perspective of heat conduction. To do this, look up the thermal conductivities of each material, and then apply Fourier's rule of heat conduction to determine that Copper would be best.
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Describe the shape and colour of a typical house in your area
list the materials
Answers
The typical house in my area is a two-story colonial style home with a white or beige brick exterior. The materials used for the exterior walls are:
BrickWoodMetalDescription of the colonial houses of my regionThe roof is usually a dark charcoal grey shingle or metal. The windows are normally rectangular with white frames. The door is usually a solid wooden door painted in a dark color such as hunter green, navy blue, or black. The trim around the windows and door is painted in the same color as the door.The typical house in my area also has a small covered porch in front, usually with a few steps leading up to the door. The porch is usually framed with white columns and a railing along the edge. The landscaping around the house consists of a few small shrubs and trees, as well as a patch of grass. The driveway is usually made of black asphalt and leads to a two-car garage.Learn more about characteristics of colonial houses:
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What happens to the particles in a solution during the process of evaporation?
Answers
Answer:
Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.
Explanation:
I hope I helped you
What happens as water freezes?
OA. The attractions between water molecules hold them in place in a
crystal lattice.
OB. The attractions between water molecules weaken and the crystal
lattice breaks apart.
OC. The water molecules slow down until all molecular motion stops.
OD. The water molecules slow down and move closer together.
Answers
When water freezes, the attractions between water molecules weaken and the crystal lattice breaks apart.
What is water molecules?Water molecules are the molecules which make up water. A water molecule consists of two hydrogen atoms bonded to a single oxygen atom, with the chemical formula H2O. The strong covalent bonds between the hydrogen and oxygen atoms give water many of its unique properties, such as its ability to dissolve many substances, its high surface tension, and its ability to absorb and release large amounts of heat energy.
As the temperature drops, the water molecules slow down and move closer together, forming a crystalline structure. As the temperature continues to decrease, the attractions between water molecules hold them in place in a crystal lattice, and all molecular motion stops.
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Convert 1.25 ug into hg
Answers
The answer is 1.25e-8.
Which of the following has the ability to cause motion and create change?
Energy
Space
Sound
Mass
Answers
Answer: Energy has the ability to cause motion and create change.