The three main causes of erosion, or the removal of soil, rock, and other materials, are wind, water, and ice.
What three factors lead to changes in landforms?Compared to plate tectonics, landforms are changed much more quickly by earthquakes, weathering, and people, and these changes are frequently visible.
Sand dunes, Loess Deposits, Yardangs, Ventifact, Deflation Hollow or Blowout, and Desert Pavement are among the geological features.
Glaciers carved a collection of strange valleys with flat bottoms and steep walls. Hanging valleys, fjords, and U-shaped valleys are a few examples of the different sorts of valleys that glaciers can destroy.
Alpine glaciers have their origins in the mountains, in a number of our National Parks. When they form in tiny basins with sloping sides, they are referred to as cirque glaciers (cirques).
U-shaped valleys have been found to be produced by glacial erosion. A massive glacier's journey through the landscape leaves imposing traces. Walls of rock blocks are torn apart by its abrasive force.
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even though the glass apparatus are broken, but we still use them in the laboratory why? explain by 3 points
The majority of laboratory equipment is constructed of glass, since it is an easy-to-clean material and allows for good vision. The majority of the chemicals used in studies don't react with it.
The fact that glass equipment is transparent, which enables researchers to easily monitor the chemical reactions and physical changes occurring within, is one of its main advantages.
This is especially crucial in investigations when the reaction's color or appearance is crucial to comprehending the underlying chemistry. The majority of the chemicals used in studies don't react with it.
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Please if you know the answer put it thanks
The diagram shows a picture of a compound.
What is a compound?A compound is a substance that is made up of two or more different elements that are chemically bonded together in a specific ratio.
This means that the elements are combined in a way that creates a new substance with different physical and chemical properties than the individual elements.
Compounds can be formed through a variety of chemical reactions, such as combining elements through a chemical bond or through a reaction between an acid and a base.
So for the given diagram, we can see that it represents two or more elements chemically combined.
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20/ The IUPAC name of (CH3)3 CCH₂COOH is:- A/ 3, 3-dimethyl butanoic acid B/ 3-methyl pentanoic acid C/ Hexanoic acid D/2, 3-dimethyl butanoic acid
Answer:
I guess correct option is A.
Which phrase describes air density? increases as altitude increases Ο Ο Ο equals mass divided by volume pushes molecules in one direction exerts less pressure as it increases
♡︎PLS HELP IM TIMED PLS WILL GIVE BRAINLIEST!!!♡︎
Answer:
The correct answer is B. equals mass divided by volume
Answer:
They were right, I got all the questions right. If you need answers I got them I guess?
Explanation:
What is the pH of a solution that has a [OH-] concentration equal to 1.36 × 10-10 M?
4.13
O 9.89
7.00
O 5.00
Answer:
Explanation:
pOH = -log1.36 X 10^-10 = 9.87
pH = 14-pOH = 14-8.97 = 5.03
Which statement correctly describes atoms? *
-Atoms combine to make all the substances on Earth.
-Atoms of all substances have the same chemical properties.
-Atoms are easily destroyed when matter is cooled or heated.
-Atoms come in different sizes, but most are visible using a simple hand lens.
Answer: Atoms combine to make all the substances on Earth.
Explanation:
Atom is a smallest entity of any matter. The atoms of different elements combine together in order to form new substances. The atoms have electrons, neutrons, as well as protons. The atoms are combined by the chemical bond. When two or more atoms combine they form a molecule. The molecules combine to form compound. Atoms cannot be broken into sub parts. The two atoms of hydrogen and one of oxygen forms water which is an essential liquid on planet earth. Other substances like carbon dioxide, coal, and sodium chloride.
Which type of mutation has no effect on protein function?
A silent mutation is a type of mutation that has no effect on protein function. This is because the mutation does not change the amino acid sequence of the protein.
What is silent mutations ?Silent mutations can happen when a single base pair in the DNA is altered without changing the amino acid that the codon is meant to encode. For instance, a silent mutation could turn the initial G in the codon for the amino acid alanine from GCG to A, creating the codon GCA. The function of the protein is unaffected since the codon GCA still codes for the amino acid alanine.
The most frequent sort of mutation is a silent mutation, which can be brought on by a number of things, including mistakes in DNA replication, contact with environmental mutagens, and random chance. Silent mutations typically have no detrimental effects on the organism.
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What is the energy of light with a wavelength of 589 nm? (The speed of light
in a vacuum is 3.00 × 108 m/s, and Planck's constant is 6.626 × 10-34 J.s.)
The energy of light with a wavelength of 589 nm is approximately 3.36 × 10^(-19) Joules.
To calculate the energy of light, we can use the equation E = hc/λ, where E represents the energy, h is Planck's constant (6.626 × 10^(-34) J·s), c is the speed of light in a vacuum (3.00 × 10^8 m/s), and λ is the wavelength of light.
Given that the wavelength is 589 nm (which is equivalent to 589 × 10^(-9) m), we can substitute the values into the equation:
E = (6.626 × 10^(-34) J·s × 3.00 × 10^8 m/s) / (589 × 10^(-9) m)
Simplifying the equation, we get:
E = (1.9778 × 10^(-25) J·m) / (5.89 × 10^(-7) m)
Dividing these values, we find:
E ≈ 3.36 × 10^(-19) J
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A sample of argon has a volume of 1.20 L at STP. If the temperature is increased to 28.0 °C and the pressure is lowered to 0.800 atm, what will the new volume be, in L?
The new volume of the sample of argon, in L, will be 1.43 L.
At STP (Standard Temperature and Pressure), the temperature is 0 °C (273 K) and the pressure is 1 atm. Therefore, the initial conditions can be expressed as:
T1 = 273 K
P1 = 1 atm
V1 = 1.20 L
To find the new volume, we can use the combined gas law:
(P1V1) / T1 = (P2V2) / T2
We can rearrange this equation to solve for V2:
V2 = (P1V1T2) / (P2T1)
Substituting the given values, we get:
V2 = (1 atm x 1.20 L x 301 K) / (0.800 atm x 273 K)
V2 = 1.43 L
At a temperature of 28.0 °C and a pressure of 0.800 atm, the new volume of the argon sample is 1.43 L.
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Which term names an icy object that orbits the sun and has a tail?
meteorite
comet
meteor
asteroid
Answer:
Comets are small, icy objects that have very elliptical orbits. When they are close to the Sun, they form comas and tails, which glow and make the comet more visible.
Explanation:
Hope This Helps!!
(brainliest please, if possible)
Answer:
comet's
Explanation:
what the other user said
what is the hardest part of the periodic table?
Answer:
carbon
Explanation:
I hope this helps :)
Answer:
carbon
Explanation:
YOU CAN MARK ME AS BRAINIEST IF YOU WANT
Calculate the pOH if the [OH-] concentration is 5.9 x 10_, M? Is the solution ACIDIC, BASIC, or NEUTRAL?
If the [OH-] concentration is 5.9 x 10^(-M), the pOH of the solution is approximately -4.77 and the solution is basic.
To calculate the pOH of a solution, we can use the formula:
pOH = -log[OH-]
Given that the [OH-] concentration is 5.9 x 10^(-M), we can substitute this value into the formula:
pOH = -log(5.9 x 10^(-M))
Calculating this expression, we find:
pOH = -log(5.9 x 10^(-M))
pOH ≈ -log(5.9) + (-log(10^(-M)))
Since log(10^(-M)) is equal to -M, the equation simplifies to:
pOH ≈ -log(5.9) - M
Now, we need the value of M (the exponent) to calculate the exact pOH value. It appears that the value of M is missing in the given information. However, assuming M is a positive value, we can continue the calculation.
If we consider M = 6, for instance, the equation becomes:
pOH ≈ -log(5.9) - 6
Now, we can evaluate the expression:
pOH ≈ 1.23 - 6
pOH ≈ -4.77
Therefore, if the [OH-] concentration is 5.9 x 10^(-M), the pOH of the solution is approximately -4.77.
To determine whether the solution is acidic, basic, or neutral, we can use the relationship between pH and pOH. The sum of the pH and pOH of a solution at 25°C is always equal to 14.
Since pOH = -4.77, the pH would be:
pH = 14 - pOH
pH ≈ 14 - (-4.77)
pH ≈ 18.77
A solution with a pH above 7 is considered basic. In this case, the calculated pH is greater than 7. Therefore, the solution is basic.
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Read each question carefully, and answer yes or no to each one. At the end of each section, follow the directions to score your answers (pay close attention as the directions for scoring may change for each section). After you complete the entire assessment, total the points from all seven sections. This will give you a total health score. The higher the score, the more healthy your lifestyle. If you feel you have a low score, look back through the assessment and identify areas where you can change your unhealthy habits, and explain what changes you would make and why. Write your assessment in the essay box below.
Section 1: Physical Fitness
Do you exercise or play a sport for at least 30 minutes three or more times a week?
Do you stretching before and after exercising?
Do you warm up before exercising and cool down afterwards?
Do you think that you are at a healthy weight?
Are you mostly happy with the way your body looks and feels?
Do you think you have enough energy?
Give yourself one point for each No response and two points for each Yes response. Section score: ____
Section 2: Family History
Do you have a family member who:
has high blood pressure?
has diabetes?
has heart disease?
has cancer?
is extremely overweight?
Give yourself one point for each Yes response and two points for each No response. Section score: ____
Section 3: Hygiene and Medical Care
Do you floss your teeth every day?
Do you brush your teeth at least twice a day?
Do you visit the dentist at least once a year?
Do you use sunscreen?
Do you know basic first aid?
Are all your immunizations current?
Do you get your vision and hearing checked each year?
Do you see the doctor for a check-up once each year?
Do you feel you get enough sleep at night?
Do you know the warning signs for cancer?
Give yourself one point for each No response and two points for each Yes response. Section score: ____
Section 4: Nutrition
Do you eat a lot of red meat or eggs?
Do you add salt to your food?
Do you add sugar to your food?
Do you eat a lot of high-fat or high-sugar foods?
Do you add butter or cheese to your food?
Do you choose fried foods more often than baked or broiled foods?
Do you drink caffeinated drinks, such as coffee or sodas?
Do you skip meals?
Give yourself one point for each Yes response and two points for each No response. Section score: ____
Section 5: Drug Use
Do you smoke or chew tobacco?
Do you drink alcohol?
Have you ever used marijuana or other illegal drugs?
Have you ever abused a prescription drug?
Give yourself zero points for each Yes response and two points for each No response. Section score: ____
Section 6: Safety
Have you ever ridden with drivers who were under the influence of alcohol or drugs?
Have you ever ridden with drivers who speed or disobey traffic laws?
Do you ever forget to wear your seat belt?
Do you ever forget to wear a helmet when riding a bike or skateboarding?
Do you ever play with matches or hazardous materials?
Is there a gun in your house?
Give yourself zero points for each Yes response and two points for each No response. Section score: ____
Section 7: Emotional and Social Health
Do you have hobbies or activities that you enjoy?
Do you give your best effort when doing your work?
Do you find it easy to laugh?
Do you express anger in an appropriate way?
Do you easily fall asleep at night?
Do you share personal problems with someone you trust?
Do you feel well liked by others?
Do you have someone you can turn to if you need help?
Are your family members and close friends in good health?
Are you generally happy?
Give yourself one point for each No response and two points for each Yes response. Section score: ____
Total Health Score: ____
Answer:
Yes
Yes
Yes
All yes
Explanation:
The volume of a sample of gas is 2.00 L when the temperature is 111C. While
the pressure remains constant the temperature is changed to a new value
which causes the volume to become 3.00L What was the temperature changed
to?
Answer:
Explanation:
Charles Law
V1/T1 = V2/T2
T2= T1V2/V1 = 384.15 X 3/2=576.23K or 303.08 Celsius
6 Give five is appliedays in which these heat transfer in our everyday life
Heat transfer plays a crucial role in various aspects of our everyday lives. Here are five examples of how heat transfer occurs in our daily activities:
Cooking; Cooling; Central Heating; Ironing; Showering
Cooking: Heat is transferred from a stove or an oven to the cooking utensils and food. Conduction occurs when the heat is transferred through direct contact between the heat source and the cooking pan. Convection takes place when hot air circulates around the food, evenly cooking it. Radiation is also involved when heat is emitted by the heating elements and absorbed by the food.
Cooling: Heat transfer is essential in cooling processes, such as using refrigerators or air conditioning systems. In refrigeration, heat is transferred from the interior of the refrigerator to the outside environment through the process of convection and radiation. In air conditioning, heat is absorbed from the indoor air and released outside, again utilizing convection and radiation.
Central Heating: Many homes and buildings use central heating systems to warm up indoor spaces. Heat is produced by a furnace or boiler and then distributed through convection and radiation. Radiators or air vents release the heated air, raising the temperature in the rooms.
Ironing: Ironing clothes involves the transfer of heat to remove wrinkles. The iron's heating element conducts heat to the metal plate, which comes into direct contact with the fabric. Conduction transfers heat from the iron to the clothes, causing the fibers to relax and remove the wrinkles.
Showering: When taking a hot shower, heat transfer is involved in multiple ways. Firstly, conduction occurs as the hot water comes into contact with your skin, transferring heat. Secondly, convection takes place as the warm water surrounds your body, creating a warm sensation. Lastly, radiation occurs as the hot water radiates heat, making the shower enclosure feel warm.
These are just a few examples, but heat transfer is involved in numerous other activities, from using hairdryers to heating water for tea. Understanding heat transfer is crucial for designing efficient systems and ensuring our comfort and safety in everyday life.
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Question 6
How many moles of carbon is found in 98.22g of carbon?
Answer:8.18 moles C
Explanation:
98.22g x 1 mole C/ 12.011g = 8.18 moles C
Which of the following is a true statement about the Earths tectonic plates?
Answer:
Pretty sure it's C
Explanation:
3. 7.5 g of hydrochloric acid react with 6.5g of zinc to produce
hydrogen gas and zinc chloride. Write the equation below,
balance it, and then determine the grams of hydrogen gas
produced by each reactant,
0.4141 grams of hydrogen gas will be produced from the reaction.
The balanced chemical equation for the reaction between hydrochloric acid (HCl) and zinc (Zn) can be written as follows:
2 HCl + Zn → ZnCl2 + H2
To determine the grams of hydrogen gas produced by each reactant, we need to use the concept of stoichiometry. First, we calculate the number of moles of each reactant.
The molar mass of HCl is approximately 36.5 g/mol, and the molar mass of Zn is approximately 65.4 g/mol.
For hydrochloric acid (HCl):
Number of moles = Mass / Molar mass = 7.5 g / 36.5 g/mol = 0.205 moles
For zinc (Zn):
Number of moles = Mass / Molar mass = 6.5 g / 65.4 g/mol = 0.0993 moles
According to the balanced equation, the mole ratio between HCl and H2 is 2:1. Therefore, for 0.205 moles of HCl, the theoretical yield of H2 is 0.205 moles.
The molar mass of hydrogen gas (H2) is approximately 2.02 g/mol.
To determine the mass of hydrogen gas produced:
Mass of H2 = Number of moles of H2 × Molar mass of H2
= 0.205 moles × 2.02 g/mol
= 0.4141 g
Therefore, 0.4141 grams of hydrogen gas will be produced from the reaction.
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Is this answer correct
Answer:
Yes
Explanation:
The engineering process defines the steps engineers take to create
technology. Which of these describes these steps in the correct order?
A. Identifying a need, researching the background of that need,
making a plan to meet the need, doing the work, evaluating the
results, looking for improvements
B. Identifying a problem, making a solution, testing the solution,
mass production, making improvements
C. Identifying a problem, testing various solutions, researching side
effects of each solution, choosing a solution, looking to improve
the solution, planning how to test the solution
OD. Identifying a problem, brainstorming solutions, researching the
background of each solution, testing solutions, choosing a
solution, production, making future improvements
The steps in the engineering process in order is D. Identifying a problem, brainstorming solutions, researching the background of each solution, testing solutions, choosing a solution, production, making future improvements.
What are the steps of the engineering process ?The initial step involves recognizing the predicament that requires resolution. One may achieve this through collaborating with fellow engineers, consulting customers, or conducting studies. After recognizing the issue at hand, the subsequent course of action involves generating ideas or solutions to address it. One way to achieve this is to generate a large number of ideas.
The subsequent phase necessitates the experimentation of potential answers. To achieve this, one must take into account both the outcomes of the assessments and the advantages and disadvantages associated with every proposed resolution. The subsequent action entails generating the resolution. One way to accomplish this is to create a prototype, while another is to manufacture the solution in large quantities. The last stage involves enhancing forthcoming developments.
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Compare and contrast the use of fossil fuels and wind energy. (1 point) Both fossil fuels and wind energy can be used to produce electricity. However, burning fossil fuels does not pollute the atmosphere, while using Earth's wind does. O Both fossil fuels and wind energy contribute negatively to climate change. However, mining for fossil fuels is much more damaging to the environment than using wind power. Both fossil fuels and wind energy can be used to produce electricity. However, wind energy does not pollute the atmosphere, while burning fossil fuels does. Both fossil fuels and wind energy contribute negatively to climate change. However, using Earth's wind for energy is much more damaging to the environment than using fossil fuels.
Answer:
The Answer will be provided below, please pay attention in class next time so that you don't have to be in a hurry like you are in now.
Explanation: The correct option is:
Both fossil fuels and wind energy can be used to produce electricity. However, burning fossil fuels does pollute the atmosphere, while using Earth's wind does not. Both fossil fuels and wind energy contribute to climate change, but the use of fossil fuels is much more damaging to the environment than the use of wind power.
Fossil fuels are non-renewable sources of energy that are formed over millions of years by the decomposition of organic matter. They release harmful greenhouse gases when burned, contributing to climate change. In contrast, wind energy is a renewable source of energy that uses turbines to harvest the power of wind. Wind energy does not produce any emissions, making it an environmentally friendly alternative to fossil fuels. While wind turbines can have some impacts on wildlife and habitats, the impact is much less severe than the effects of fossil fuel extraction and burning.
Added Part: Fossil fuels are non-renewable sources of energy that are derived from the remains of plants and animals that died millions of years ago. These sources include coal, oil, and natural gas. Wind energy, on the other hand, is a renewable source of energy that is generated by the kinetic energy of wind.
Here are some comparisons between fossil fuels and wind energy:
Environmental Impact: Fossil fuels have a significant negative impact on the environment. Burning fossil fuels produces greenhouse gases that contribute to climate change. The extraction of fossil fuels also has negative impacts on the air, water, and soil. Wind energy, however, has a very small environmental footprint. Wind turbines do not produce any emissions and do not require any water to generate electricity.
Energy Availability: Fossil fuels are abundant and have been the primary source of energy for decades. On the other hand, wind energy is a relatively new source of energy and the technology is still developing. However, the availability of wind energy is significant, as wind is a renewable source that is constantly available.
Sustainability: Fossil fuels are non-renewable, which means they will eventually run out. As the demand for energy continues to increase, the availability of fossil fuels will decrease. Wind energy is a renewable source of energy that will never run out.
Here are some pros and cons of both fossil fuels and wind energy:
Fossil Fuels:
Pros:
Reliable source of energy
High energy density
Large global infrastructure
Cons:
Non-renewable source of energy
Significant environmental impact
Price instability
Wind Energy:
Pros:
Renewable source of energy
Small environmental footprint
Low operating costs
Cons:
High initial costs for building wind turbines
Wind is an inconsistent source of energy
Can create noise pollution for surrounding communities
Changes in which measurement shift the equilibrium in the forward direction?
increase time
O increase concentration of products
increase concentration of reactants
O decrease pressure
Answer:
increase concentration of reactants
Explanation:
I took the test
Which of the following compounds contain sterogenic centres (stereocentres)?
The compound that contains sterogenic centre is the 1,3,4-trichloropentane. That is option F.
What are sterogenic centres of a compound?Sterogenic centers are found in compounds where a carbon atom share four bonds to the carbon atom with each to different elements or functional groups.
From the list of example given above, the carbon atom of which Ch the second chloride is attached to is sharing bonds with carbon, hydrogen, chloride and another carbon.
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An isomer of C3H7O undergoes one step oxidation reaction. Answer the following questions due to this reaction.
a) Write a full symbol equation for this reaction.b) Name the proper reagent and catalyst for this reaction.c) Why do you think there is no need to remove the product from the reaction vessel?
Answer:
C3H7O + O2 → CO2 + H2O
Explanation:
a) The full symbol equation for the oxidation reaction of an isomer of C3H7O can be represented as:
C3H7O + O2 → CO2 + H2O
b) The proper reagent for this oxidation reaction is O2 (oxygen gas). The catalyst required for this reaction depends on the specific conditions. Common catalysts used for oxidation reactions include transition metals such as platinum (Pt), palladium (Pd), or copper (Cu).
c) There is no need to remove the product (CO2 and H2O) from the reaction vessel because they are typically in the gas or liquid phase and do not significantly interfere with the reaction. The product gases can be easily vented out of the vessel, while the liquid water can be left in the reaction mixture. Additionally, the product CO2 is a stable and inert gas, which does not pose any hazards in most cases. Therefore, it is often not necessary to remove the products after the reaction is complete.
Please help for brainliest
Curious Carl's chemistry teacher asked him to make a sugar solution. Carl dissolved 400 grams of sucrose (C12H22O11 , molar mass 342.3mol) in 1.00 L of water.
If molarity = moles/liter, what is the molarity of Carl's sugar solution?
Question 31 options:
1.2 M
0.86 M
0.40 M
1.0 M
Answer:
The molarity of Carl's sugar solution can be calculated using the formula:
Molarity = moles of solute / liters of solution
First, we need to determine the number of moles of sucrose in the solution. We can do this using the formula:
moles = mass / molar mass
The mass of sucrose is 400 grams, and the molar mass is 342.3 g/mol:
moles = 400 g / 342.3 g/mol
moles = 1.167 mol
Now we can calculate the molarity by dividing the moles by the liters of solution (which is 1.00 L):
Molarity = 1.167 mol / 1.00 L
Molarity = 1.2 M
Therefore, the molarity of Carl's sugar solution is 1.2 M. Answer: 1.2 M.
Explanation:
Arsenate (AsO43-) is structurally and chemically similar to inorganic phosphate (PO43-), and many enzymes that act on phosphate will also use arsenate as a substrate if it is available. However, unlike phosphates, organic compounds of arsenate are kinetically unstable. For example, acyl phosphates (such as 1,3-bisphosphoglycerate) require an enzyme to catalyze phosphate hydrolysis on a biologically relevant timescale, but acyl arsenates hydrolyze almost instantaneously in water without an enzyme.
a) Predict the effect on the net reaction catalyzed by glyceraldehyde 3-phosphate dehydrogenase if phosphate were replaced by arsenate.
b) Write a balanced overall equation for the conversion of glucose to pyruvate in the presence of ATP, ADP, NAD+, and arsenate.
c) Arsenate is extremely toxic to most organisms. Based on your answers above, explain why.
Answer:
A) The effect on the net reaction catalyzed by glyceraldehyde is that
The 1-arsen0, 3-phosphoglycerate will decompose without enzymes hence no ATP will be formed in the reaction ( phosphoglycerate Kinase )
B) There will be no conversion of ADP to ATP from the conversion of glucose to pyruvate hence No balanced overall equation can be derived
C ) Arsenate is very toxic to most organisms and it is used mostly regarded as poisons during the formation of glycolysis, it forms 1-arsen0, 3-phosphoglycerate which hinders the formation of ATP because it is unstable and will hydrolyze quickly, this will also lead to the reduction in oxygen in cells thereby leading to the death of cells
Explanation:
A) The effect on the net reaction catalyzed by glyceraldehyde is that
The 1-arsen0, 3-phosphoglycerate will decompose without enzymes hence no ATP will be formed in the reaction ( phosphoglycerate Kinase )
B) There will be no conversion of ADP to ATP from the conversion of glucose to pyruvate hence No balanced overall equation can be derived
C ) Arsenate is very toxic to most organisms and it is mostly regarded as poisons during the formation of glycolysis, it forms 1-arsen0, 3-phosphoglycerate which hinders the formation of ATP because it is unstable and will hydrolyze quickly, this will also lead to the reduction in oxygen in cells thereby leading to the death of cells
Those structures that are similar in all behavior is called homologous structure.
The answer of the following question is as follows:-
The effect on the net reaction catalyzed by glyceraldehyde is that the 1-arsen0, 3-phosphoglycerate will decompose without enzymes hence no ATP will be formed in the reaction ( phosphoglycerate Kinase ) There will be no conversion of ADP to ATP from the conversion of glucose to pyruvate hence No balanced overall equation can be derived Arsenate is very toxic to most organisms and it is used mostly regarded as a poison during the formation of glycolysis, it forms 1-arsen0, 3-phosphoglycerate which hinders the formation of ATP because it is unstable and will hydrolyze quickly, this will also lead to the reduction in oxygen in cells thereby leading to the death of a cell.For more information, refer to the link:-
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True or False Polyunsaturated fatty acids are precursors of other molecules.
Dietary fats include polyunsaturated fat. Along with monounsaturated fat, it is one of the good fats. Foods like salmon, vegetable oils, and other plant- and animal-based foods include polyunsaturated fat. They act as precursors of other molecules. The given statement is true.
Precursors of eicosanoids with hormone-like properties including prostaglandins, leukotrienes, and thromboxanes are polyunsaturated fatty acids (PUFA).
Dihomo-linolenic acid (DGLA), arachidonic acid (AA), and eicosapentaenoic acid (EPA) are the three precursors that prostaglandins can be formed from. Depending on the precursor, series 1, 2, or 3 prostanoids is produced.
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Calculate the pH when 90.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴).
The pH of the solution is 10.82.
To solve this problem, we need to determine the concentration of the hydronium ion ([tex]H_3O^+[/tex]) in the solution. This can be done using the following steps:
Write the balanced chemical equation for the reaction between HBr and CH₃NH₂.
HBr + CH₃NH₂ → CH₃NH₃⁺ + Br⁻
Write the expression for the base dissociation constant (Kb) for CH₃NH₂.
Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]
Calculate the concentration of hydroxide ions (OH⁻) in the solution using the Kb value and the concentration of CH₃NH₂.
Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]
4.4 × 10⁻⁴ = x² / (0.400 M)
x = 6.63 × 10⁻³ M
[OH⁻] = 6.63 × 10⁻³ M
Calculate the concentration of [tex]H_3O^+[/tex] using the equilibrium constant for the reaction between HBr and [tex]H_2O[/tex].
[tex]HBr + H_2O = H_3O^+ + Br^-[/tex]
[tex]Kw = [H_3O^+][OH^-] = 1.0 * 10^{-14}\\[H_3O^+] = Kw/[OH-] = 1.51 * 10^{-11}[/tex]
Calculate the pH using the concentration of [tex]H_3O^+[/tex].
[tex]pH = -log[H_3O^+]\\pH = -log(1.51 * 10^{-11})[/tex]
pH = 10.82
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WHAT IS THE PERCENT OF HYDROGEN IN CU(C2H3O2)2?
WITH SOLUTION
Answer:
Hydrogen H 3.330% Carbon C 26.450% Oxygen O 35.234%
Explanation:
URGENT HELP
Which of the following experimental plans will test the effects of pressure on a reaction with gases and what is
the expected result?
A Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.
B Keep pressure constant and increase the temperature of the reaction; reaction rate will decrease.
C Keep temperature constant and decrease the pressure of the reaction; reaction rate will increase.
D Keep pressure constant and decrease the temperature of the reaction; reaction rate will increase.
Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.
option A.
What is Boyle's law?Boyle's law states that pressure of a given mass of a gas is directly proportional to its volume provided, temperature of the gas is kept constant.
Le Chatelier's Principle states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change to reestablish an equilibrium.
So the experimental plans that will test the effects of pressure on a reaction with gases and its expected result is keep temperature constant and increase the pressure of the reaction; reaction rate will increase.
Thus, option A is the correct answer.
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