The protective methods for backflow prevention devices in the order of decreasing effectiveness are Air gap, VB, RPZ, and DCVA. So, Option A) is the correct answer.
An air gap is considered the most effective method of preventing backflow as it creates a physical separation between the potable water supply and the potential source of contamination. Vacuum breakers (VB) are also highly effective as they work by allowing air into the system to prevent backflow. Reduced pressure zone devices (RPZ) are designed to prevent backflow by creating a zone of reduced pressure, which prevents water from flowing back into the potable water supply.
Finally, double-check valve assemblies (DCVA) are considered the least effective method of backflow prevention, as they consist of two check valves and are prone to failure due to wear and tear. It is important to note that the type of backflow prevention device required will depend on the specific application and level of risk. Regular testing and maintenance of backflow prevention devices are also essential to ensure their continued effectiveness in protecting public health and safety.
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Im a titration of a weak acid with a strong base, what is the pH of the solution at the equivalent point?
A >7
B 7
C <7
D 0
Answer:
C
Explanation:
Question 72
The gases frequently found in water that encourage corrosion are
a. Methane and oxygen
b. Oxygen and carbon dioxide
c. Chlorine and carbon dioxide
d. Methane and hydrogen sulfide
The gases frequently found in water that encourage corrosion are: b. Oxygen and carbon dioxide. The correct answer is option B)
The gases frequently found in water that encourage corrosion are option b: oxygen and carbon dioxide. These gases can react with the metal in pipes and cause corrosion over time. Chlorine can also contribute to corrosion, but it is not as common as oxygen and carbon dioxide. Methane and hydrogen sulfide are not typically found in water and are not significant contributors to corrosion.
Oxygen and carbon dioxide are two gases that are typically present in water and promote corrosion. These gases have the potential to corrode pipes over time by reacting with the metal. While chlorine is not as prevalent as oxygen and carbon dioxide, it can nevertheless lead to corrosion. Since they are not frequently present in water, methane and hydrogen sulphide do not significantly contribute to corrosion.
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Which of the following describes how blood helps to maintain homeostasis by working with the immune system?
Homeostasis is the process by which a body is able to adapt to different conditions and keep the body in relatively stable internal conditions at all times.
During homeostasis, blood helps regulate the body temperature by eliminating excess heat, maintaining the pH balance of the body, and maintaining the internal osmotic pressure.
The immune system assists in homeostasis by screening and destroying pathogens and helps prevent autoimmunity as well as regulates immune reactions periodically. If the immune system fails to do these processes, then it may result in the appearance of cancer.
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Answer:
c
Explanation:
Around 90% of all the atoms in the universe are ________________, and they were all made by the Big
Bang, more than 13 billion years ago.
Around 90% of all atoms in the universe are made of hydrogen, the simplest and lightest element, and they were all produced during the Big Bang.
Conditions were extremely hot and dense for the initial few minutes of the cosmos. The simplest element, hydrogen, was created in this atmosphere through a process known as nucleosynthesis. Helium was produced through the fusion of protons and neutrons during this process, along with trace amounts of lithium and beryllium. Hydrogen atoms would eventually go on to create stars and galaxies, resulting in the intricate universe we know today. As the most prevalent element in the universe, hydrogen is frequently used as a benchmark by astronomers who research the cosmos.
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12.8 liters of a gas are prepared at 750 mmHg and -108o C. the gas is then forced into a .855-liter cylinder in which the temperature warms up to 22o C. what is the new pressure in mmHg.
The new pressure in mmHg is 11.23 if 12.8 liters of a gas are prepared at 750 mmHg and -108o C. the gas is then forced into a .855-liter cylinder in which the temperature warms up to 22o C.
What is the new pressure in mmHg?According to Boyle's Law
[tex]P_{1}V_{1} =P_{2} V_{2}[/tex]
Substituting the value in the equation
[tex]750*12.8=P_{2} *855[/tex]
[tex]P_{2}[/tex]= 11.23 mmHg
Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law, is an experimental gas law that specifies the relationship between pressure and volume in a confined gas.
P1V1=P2V2 when temperature remains constant, according to Boyle's Law. Boyle's Law also indicates that pressure is inversely linked to volume. This indicates that as pressure increases, volume decreases (and vice versa). PV=k (k = the proportionality constant) is also stated by Boyle's Law.
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If an equilibrium for a reaction is said to lie to the right then the equilibrium constant
A) is a negative value.
B) is a positive value less than one.
C) is a positive value greater than one.
D) is equal to one.
Answer:
The Answer is C it My GuestHave a Nice Best Day : )
Which device serves the same function as the packing?
a.) Inline suction gland
b.) Packing gland
c.) Mechanical seal
d.) Lantern seal
The device that serves the same function as the packing is mechanical seal . Option (c) is correct.
Packing is the most common form of sealing used in controlling devices. A mechanical seal is considered as a method in which fluid is contained in a vessel for example: pumps and mixers, where one rotating shaft passes through one stationary housing. Mechanical seal is of comparatively low cost. These kind of seals lasts longer than packing.
Therefore, mechanical seals are generally preferred over the commonly used traditional packing seals in applications which controls or prevents leakage problems .Some other advantages of mechanical seals are that these seals are more durable and they use multiple sealing points in order to eliminate any kind of leakage.
Thus, the correct option is (c)
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You can use molecular sieves to remove water to shift the equilibrium in the esterification rex. Why can you not use other drying agents to do the same?
Molecular sieves are effective in removing water to shift the equilibrium in esterification reactions because they have a highly specific pore size that selectively adsorbs water molecules.
This allows them to effectively remove water without reacting with or affecting the other components in the reaction mixture. Other drying agents might not be suitable for this purpose because they can either react with the reactants, products, or catalysts involved in the esterification process, or they may not be selective enough in removing only water, thus potentially affecting the overall reaction equilibrium.
Molecular sieves are often preferred as drying agents in esterification reactions because they have a high surface area and can selectively adsorb water molecules, thereby helping to shift the equilibrium towards the desired product. Other drying agents, such as calcium chloride or magnesium sulfate, may also be used but they have a lower selectivity for water and may also react with the reactants or products, potentially leading to unwanted side reactions. Additionally, molecular sieves can be easily regenerated by heating, making them more cost-effective than other drying agents in the long run.
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Question 28 Marks: 1 The gas causing the distinct "rotten egg" odor in many water sources isChoose one answer. a. hydrogen sulfide b. carbon dioxide c. chlorine gas d. hydrogen carbonate
The gas causing the distinct "rotten egg" odor in many water sources is hydrogen sulfide (H2S).
Hydrogen sulfide (H2S) is a colorless gas with a distinct, unpleasant odor that is often described as smelling like rotten eggs. It is produced by the natural decomposition of organic matter, such as in swamps, sewage treatment plants, and manure pits. It is also produced by some industrial processes, such as petroleum refining and paper production.
Hydrogen sulfide is highly toxic, even at low concentrations, and can cause a range of health effects, including headaches, dizziness, nausea, and even death at high concentrations. It is also flammable and can form explosive mixtures with air.
In water sources, hydrogen sulfide can occur naturally or as a result of human activity, such as mining or drilling. It is often found in well water and can cause water to have a foul taste and smell. The presence of hydrogen sulfide in water can also cause corrosion of plumbing fixtures and appliances, as well as staining of clothing and other materials.
Hydrogen sulfide can be removed from water using a variety of methods, including aeration, oxidation, and chemical treatment. Aeration involves exposing the water to air, which allows the hydrogen sulfide gas to escape into the atmosphere. Oxidation involves adding an oxidizing agent, such as chlorine or hydrogen peroxide, to the water to convert the hydrogen sulfide gas to sulfate. Chemical treatment involves adding chemicals such as iron salts or activated carbon to the water to remove the hydrogen sulfide.
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what dye did we use in bradford assay?
The Bradford assay, we typically use Coomassie Brilliant Blue dye to detect and quantify protein concentration in a sample. This dye binds to amino acid residues in proteins and results in a color change that can be measured spectrophotometrically.
The Bradford assay, the dye used is called Coomassie Brilliant Blue G-250. This dye interacts with proteins, allowing for the quantification of protein concentrations in a sample. The absorbance of the resulting protein-dye complex can be measured to determine the protein concentration based on a standard curve.The Bradford assay is based on the use of the dye Coomassie Brilliant Blue G-250, which is frequently abbreviated as Coomassie G-250 or Coomassie Blue. This is one of two Coomassie dyes that are often confused.
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How many moles of magnesium are needed to react with 3. 0 mol of O2?
2Mg(s) + O2(g) → 2MgO(s)
Total, 6.0 moles of magnesium were needed to react with 3.0 moles of O₂.
Balanced chemical equation for the reaction between magnesium and oxygen is;
2Mg(s) + O₂(g) → 2MgO(s)
From the equation, we can see that 2 moles of Mg react with 1 mole of O₂ to produce 2 moles of MgO. Therefore, we can set up a proportion to calculate the number of moles of Mg needed to react with 3.0 moles of O₂;
2 mol Mg / 1 mol O₂ = x mol Mg / 3.0 mol O₂
Solving for x, we get:
x = 2 mol Mg / 1 mol O₂ × 3.0 mol O₂
x = 6.0 mol Mg
Therefore, we are needed 6.0 mol of magnesium.
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Which type of plot will be linear for a second order reaction?
A) [A] vs time
B) ln[A] vs time
C) 1/[A] vs time
D) [A]2 vs time
E) None is linear
B) ln[A] vs time. For a second order reaction, the rate law can be written as rate = k[A]². Taking the natural logarithm of both sides yields ln(rate) = ln(k) + 2ln[A].
This can be rearranged to give the linear plot of ln[A] vs time with a slope of 2k and a y-intercept of ln(k). Therefore, the plot that will be linear for a second order reaction is B) ln[A] vs time.
A negative number results from any real integer that is more than 0 but less than 1. The output is zero when the input is 1. And last, any real number that is bigger than 1 leads to a positive number. Therefore, the set of all real numbers bigger than zero is the domain of the natural logarithm function.
We must make advantage of the characteristics of natural logarithmic and natural exponential functions in order to represent a function in terms of these functions.
With e (the natural number) as its base, the natural logarithmic function is represented by the symbol ln(x). E(x) stands for the natural exponential function.
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Comparision of IR of starting materials to products (esterification)
In the process of esterification, there are certain IR (infrared) spectral characteristics that can be used to compare the starting materials with the products. One of the most prominent features of the IR spectrum is the carbonyl peak, which is typically found at around 1700 cm-1 for esters.
In the starting materials, this peak will not be present, but it will appear in the IR spectrum of the products, indicating the formation of an ester bond. Another important feature of the IR spectrum that can be used for comparison is the C-O stretch, which is typically found at around 1200-1300 cm-1 for esters. Again, this peak will be absent in the starting materials but will appear in the products.
Other peaks that can be used for comparison include the C-H stretches, which are typically found at around 2800-3000 cm-1 for alkanes, and the O-H stretch, which is typically found at around 3400 cm-1 for carboxylic acids. These peaks will be present in the starting materials but will not appear in the products. Overall, a comparison of the IR spectra of the starting materials and products in esterification can provide valuable information about the formation of ester bonds and the presence or absence of certain functional groups.
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22. In a linked-based implementation of the ADT list with only a head reference, what is the performance of adding an entry at the end of the list? a. O(n) b. O(n 2 ) c. O(log n) d. O(1)
In a linked-based implementation of the ADT list with only a head reference, the performance of adding an entry at the end of the list is O(1). So the correct option is d.
In a linked-based implementation of an Abstract Data Type (ADT) list with only a head reference, the performance of adding an entry at the end of the list is generally not optimal. This is because, without a tail reference (i.e., a reference to the last node in the list), adding an entry at the end of the list would require traversing the entire list from the head to the last node, which takes linear time.
Therefore, the time complexity for adding an entry at the end of the list in a linked-based implementation with only a head reference would typically be O(n), where n is the number of elements in the list. This is because the time taken for the operation increases linearly with the size of the list, as each element may need to be traversed before reaching the end of the list to add the new entry.
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Question 52
Methyl bromide is used primarily as a a. Fertilizer
b. Herbicide
c. Pesticide
d. fungicide
The correct answer is c. Methyl bromide is primarily used as a pesticide.
Methyl bromide is primarily used as a pesticide and fungicide. It works by releasing a gas that kills insects, weeds, and fungi. It is used in a variety of agricultural, commercial, and residential settings. In some cases, it is used to fumigate stored grains, ship hulls, soil, and other areas where pests and fungi may be present. It is also used to treat seed beds to kill weeds and fungi before planting. Methyl bromide can also be used in greenhouses to prevent the spread of pests and diseases.
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calculate the total masses of the products for the following equation: 2seo2(g) o2→2seo3(g)
To calculate the total masses of the products for the given chemical equation, we need to balance the equation first. Balancing the equation means making sure that the number of atoms of each element is the same on both the reactant and product sides of the equation.
The balanced equation for the given reaction is:
2SeO2(g) + O2(g) → 2SeO3(g)
From the balanced equation, we can see that two moles of SeO2 react with one mole of O2 to produce two moles of SeO3. To calculate the total mass of the products, we need to use the molar masses of SeO3 and O2. The molar mass of SeO3 is 143.97 g/mol, and the molar mass of O2 is 32.00 g/mol.
Using the equation, we know that two moles of SeO3 are produced for every one mole of O2. Therefore, the total mass of SeO3 produced can be calculated as follows:
2 mol SeO3 x 143.97 g/mol = 287.94 g SeO3
The total mass of O2 consumed can be calculated as follows:
1 mol O2 x 32.00 g/mol = 32.00 g O2
Therefore, the total mass of the products is 287.94 g SeO3 and 32.00 g O2.
The total mass of the products for the given equation is 287.94 g.
To calculate the total masses of the products for the given equation, we need to first balance the equation:
2SeO2(g) + O2(g) → 2SeO3(g)
Now, we can use the balanced equation to determine the total masses of the products. The molar mass of SeO3 is 143.97 g/mol.
2 moles of SeO3 is produced for every 1 mole of O2 consumed. Therefore, if we know the mass of O2 consumed, we can calculate the mass of SeO3 produced.
Assuming we have 1 mole of SeO2, which has a molar mass of 110.96 g/mol, and we consume 1 mole of O2, which has a molar mass of 32 g/mol, the total mass of the products would be:
2 moles of SeO3 x 143.97 g/mol = 287.94 g
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A solution of pH 4 is how many times more acidic than a solution of pH 5?
A 1
B 10
C 25
D 100
The pH scale is a logarithmic scale that measures the concentration of hydrogen ions in a solution. A decrease in one unit of pH corresponds to a ten-fold increase in the concentration of hydrogen ions. Therefore, a solution of pH 4 has 10 times more hydrogen ions than a solution of pH 5.
To answer the question, we can calculate the ratio of hydrogen ion concentrations between the two solutions:
Ratio of hydrogen ion concentrations = 10^(pH5 - pH4) = 10^(5-4) = 10
Therefore, a solution of pH 4 is 10 times more acidic than a solution of pH 5.
The answer is B) 10.
~~~Harsha~~~
What are the strongest types of intermolecular forces that must be overcome in order to:? (a) evaporate benzene (C6H6) (b) boil chloroform (CHCl3) (c) boil liquid ammonia (NH3)
1. (a) dispersion (b) dipole-dipole (c) dipole-dipole
2. (a) dipole-dipole (b) dispersion (c) H-bonding
3. (a) dispersion (b) dispersion (c) dispersion
4. (a) dispersion (b) dipole-dipole (c) H-bonding
The strongest type of intermolecular forces that must be overcome in order to evaporate benzene (C₆H₆), boil chloroform (CHCl₃), and boil liquid ammonia (NH₃) are dispersion, dipole-dipole, and H-bonding, respectively.
What is intermolecular?Intermolecular forces are the forces of attraction or repulsion that occur between neighboring molecules. These forces are weaker than the intramolecular forces that bind atoms together to form molecules, but they still play an important role in determining the properties and behavior of substances.
Benzene is a nonpolar molecule with no permanent dipole moments and so the strongest intermolecular force is dispersion. Chloroform is a polar molecule and so the strongest intermolecular force is dipole-dipole. Lastly, liquid ammonia is a polar molecule that is capable of forming hydrogen bonds and so the strongest intermolecular force is H-bonding.
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Can you tell me the density of a sample of ozone gas O3 at 755 Torr and 18C
124g/ml is the density of a sample of ozone gas at 755 Torr and 18C. Density is the mass of an object substance per unit volume.
Density is the mass of an object substance per unit volume. d = M/V, wherein d is density, M is the weight, and V is volume, is the formula for density. Grammes per cubic centimetre are a typical unit of measurement for density.
For instance, while Earth has a density of 5.51 grammes per cubic centimetre, water has a density of 1 grammes per cubic centimetre. The metre-kilogram-second (or SI) unit for density is kilogrammes per cubic metre. For instance, air weighs 1.2 kilogrammes per cubic metre.
Density=PM/RT
= 755 ×48/0.0821×291
=124g/ml
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in this experiment, you must use room temperature di water from the larger carboys in the lab to create your alkaline earth hydroxide solution. why must you use the di water from the carboys and not from the tap?
In this experiment, it is crucial to use room temperature deionized (DI) water from the larger carboys in the lab when creating your alkaline earth hydroxide solution. There are a few reasons why you must use the DI water from the carboys instead of tap water.
1. Purity: DI water from the carboys is of higher purity than tap water. Tap water typically contains dissolved salts, minerals, and other impurities that can interfere with the chemical reactions or affect the accuracy of the experiment results. Using DI water ensures that these unwanted contaminants are not introduced into the solution. 2. Consistency: Laboratory carboys are designed to provide consistent water quality, ensuring that the DI water used in the experiment remains the same throughout the process. On the other hand, tap water quality may vary over time, which can introduce inconsistencies and errors into the experiment. 3. Controlled temperature: The DI water in the carboys is maintained at room temperature, which is essential for the accurate preparation and execution of the experiment. Tap water temperature can fluctuate, potentially affecting the chemical reactions and the reproducibility of the experiment results. 4. Reduced risk of contamination: Using DI water from the carboys minimizes the risk of introducing any bacteria or other contaminants that might be present in tap water. This ensures that the experiment is conducted in a controlled environment and that the results obtained are reliable and accurate. In summary, using room temperature DI water from the larger carboys in the lab is crucial for the accuracy, consistency, and reproducibility of the experiment when creating your alkaline earth hydroxide solution. This helps to minimize errors, avoid unwanted reactions, and maintain the purity and reliability of the experiment results.
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What is the daughter nucleus (nuclide) produced when Pb211 undergoes beta decay by emitting an electron
the daughter nucleus (nuclide) produced when Pb-211 undergoes beta decay by emitting an electron is Bi-211.
When Pb-211 undergoes beta decay, it transforms into a new nuclide by emitting an electron. Beta decay occurs when a neutron in the nucleus of an atom is transformed into a proton, and an electron (known as a beta particle) is emitted from the nucleus.
In this case, Pb-211 decays into Bi-211 through beta-minus decay. Beta-minus decay occurs when a neutron in the nucleus is converted into a proton, and an electron (beta particle) and an antineutrino are emitted. The process can be represented as follows:
Pb-211 → Bi-211 + e- + ν
In this equation, Pb-211 represents the parent nuclide, Bi-211 is the daughter nuclide, e- is the beta particle (electron) emitted during the decay, and ν is an antineutrino.
what is beta particle?
A beta particle, also known as a beta particle or beta radiation, is a high-energy, high-speed electron or positron that is emitted from the nucleus of an atom during radioactive decay.
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suppose a vodka martini contains 30% alcohol with the remaining portion of the drink composed of water. what is the solute in this type of martini? group of answer choices ice olive water alcohol none of the above
Suppose a vodka martini contains 30% alcohol with the remaining portion of the drink composed of water What is the solute in this type of martini A ice B water C olive D alcohol E none of the above 6 We dissolve 2.45 g of sugar in 200.0 g water.
The solute in this type of martini is alcohol, as it is the substance being dissolved in the water portion of the drink.
Hi! In a vodka martini with 30% alcohol and the remaining portion composed of water, the solute is alcohol. This is because alcohol is the substance that is dissolved in the solvent water to form the solution martini. It is conventional wisdom in catering circles that at evening events two thirds of people choose white wine as their beverage. The new catering manager at Simmons would like to know whether or not this figure holds true at Simmons.
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What are [Cu+] and [CN−] in a saturated CuCN solution if the Ksp of CuCN is
4x10^−20?
Answer:
The solubility product constant, Ksp, for the reaction of copper(I) cyanide (CuCN) in water is given as 4x10^−20. The balanced chemical equation for this reaction is:
CuCN (s) ↔ Cu+ (aq) + CN− (aq)
The Ksp expression for this reaction is:
Ksp = [Cu+][CN−]
At equilibrium, the solution is saturated with CuCN, which means that the concentration of CuCN is equal to its solubility (S), and the concentrations of Cu+ and CN− are equal to x (the amount that dissolves). Thus, we can write:
CuCN (s) ↔ Cu+ (aq) + CN− (aq)
I S x x
The solubility of CuCN is equal to the amount that dissolves, which is equal to the initial concentration of Cu+ and CN− in the solution. Therefore:
[S] = [Cu+] = [CN−] = x
Substituting these values into the Ksp expression, we get:
Ksp = [Cu+][CN−] = x^2
Solving for x, we get:
x = sqrt(Ksp) = sqrt(4x10^-20) = 2x10^-10
Therefore, the concentrations of Cu+ and CN− in a saturated CuCN solution are both 2x10^-10 mol/L.
both low explosives and high explosives will typically create a crater in the spot where the bomb detonates. true or false
False. While both low explosives and high explosives release energy upon detonation, high explosives generally create a crater due to their faster and more violent energy release. Low explosives, on the other hand, burn at a slower rate and typically do not produce a crater.
An explosive event that occurs at, immediately above, or below the surface can cause material to be ejected from the ground's surface, creating an explosion crater.
An explosive event causes material from the ground to be displaced and ejected, creating a crater. Usually, it has a bowl-like shape. Three processes—high-pressure gas, shock waves—are in charge of making the crater:
-Ground deformation caused by plasticity.
-Ejecta, or material that is thrown up by an explosion, from the ground.
-The ground's surface spalling.
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Yes, both low explosives and high explosives have the ability to create a crater in the spot where the bomb detonates. This is because when explosives are detonated, they rapidly release large amounts of energy, which generates a high-pressure shock wave.
This shock wave then travels outward from the point of detonation, causing the surrounding ground to be displaced and ejected, resulting in a crater. However, the size and depth of the crater will depend on the type and amount of explosives used, as well as the nature of the surrounding soil and terrain. High explosives, which typically contain a higher percentage of energetic materials, are generally more powerful and capable of creating larger and deeper craters compared to low explosives.
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the complete photoelectron spectra (pes) for an element shows three peaks of identical size. what does this indicate about the element?
If the complete photoelectron spectra (pes) for an element shows three peaks of identical size, this indicates that the element has three valence electrons with similar energy levels.
This information can be useful in determining the element's chemical properties and potential reactions with other elements. The complete photoelectron spectra (PES) for an element showing three peaks of identical size indicates that the element has three electron subshells with the same number of electrons in each subshell. This suggests that the element has a balanced electron distribution within its energy levels.
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Why should you use pencil instead of pen when marking on a thin layer chromatography plate?
a. Pencil lead isn't as dark.
b. The components of pen ink will separate along with your sample, while pencil lead will not.
c. Pen ink will not mark on a TLC plate.
d. Pen ink will undergo a chemical reaction with the solvent.
You should use a pencil instead of a pen when marking on a thin layer chromatography plate because the components of pen ink will separate along with your sample, while pencil lead will not. So, the correct answer is b.
Using a pen to mark on a thin layer chromatography plate can cause the ink components to mix with the sample components, making it difficult to accurately analyze the separation of the components. Pencil lead, on the other hand, is inert and will not interfere with the separation process.
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Question 9
When treating water with chlorine in emergency situations, the chlorine dosage should be __ when the water is turbid or colored.
a. tripled
b. discontinued
c. decreased
d. doubled
When treating water with chlorine in emergency situations, the chlorine dosage should be (d) doubled when the water is turbid or colored.
When treating water with chlorine in emergency situations, the chlorine dosage should be doubled when the water is turbid or colored. This is because the presence of suspended particles can reduce the effectiveness of the chlorine, so a higher dosage is needed to ensure that the water is properly disinfected.
If the water is cloudy or coloured, you should increase the chlorine dosage when treating it with chlorine in an emergency. This is due to the fact that suspended particles might decrease the chlorine's efficacy, necessitating a higher dosage to ensure that the water is effectively disinfected.
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With the above balanced equation, make at least four mole ratios (one is done for you):
6 KOH
2 K3PO4
The four mole ratios are: 6 KOH / 2 K₃PO₄, 2 KOH / 1 Co₃(PO₄)₂,
1 K₃PO₄ / 1 Co₃(PO₄)₂, 1 Co(OH)₂ / 2 KOH.
What do you understand by mole ratio?Mole ratio refers to the ratio between the number of moles of two substances in a chemical reaction.
The given chemical equation is:
2 KOH + Co₃(PO₄)₂ → K₃PO₄ + Co(OH)₂
And the first mole ratio given is:
6 KOH / 2 K₃PO₄
To find the other mole ratios, we need to first balance the chemical equation. It is already balanced, so we can proceed to find the other mole ratios:
(2) 2 KOH / 1 Co₃(PO₄)₂
This ratio indicates that two moles of potassium hydroxide react with one mole of cobalt(II) phosphate.
(3) 1 K₃PO₄ / 1 Co₃(PO₄)₂
This ratio indicates that one mole of potassium phosphate is produced for every mole of cobalt(II) phosphate that reacts.
(4) 1 Co(OH)₂ / 2 KOH
This ratio indicates that one mole of cobalt(II) hydroxide is produced for every two moles of potassium hydroxide that react.
Therefore, the four mole ratios are:
(1) 6 KOH / 2 K₃PO₄
(2) 2 KOH / 1 Co₃(PO₄)₂
(3) 1 K₃PO4 / 1 Co₃(PO₄)₂
(4) 1 Co(OH)₂ / 2 KOH
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Correct question is:
KOH + Co₃(PO₄)₂ →
With the above balanced equation, make atleast four mole ratios ( one is done for you ):
[tex]\frac{6KOH}{2K3PO4}[/tex] - - -
A balloon with 0.48 moles of gas rises from sea level to the upper atmosphere (0.5 atm, 2oC). What is the volume of the balloon?
The volume of the balloon is 6.24 L. The random motion of the gas particles is consistent with Newton's Laws of Motion.
What is the explanation of the ideal gas law?the rule that states that the sum of the absolute temperature of the gas and the universal gas constant is equal to the product of the pressure and volume of a single gram of an ideal gas.
We can use the ideal gas law,
PV = nRT
P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
Now, we have to convert the temperature to Kelvin:
T = 2 + 273.15 = 275.15 K
We can substitute the values,
P = 0.5 atm
n = 0.48 mol
R = 0.08206 L·atm/(mol·K)
T = 275.15 K
PV = nRT
V = (nRT)/P
V = (0.48 mol * 0.08206 L·atm/(mol·K) * 275.15 K) / 0.5 atm
V = 6.24 L
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Question 14
The chemical used as a measure of the oxidant level of the atmosphere at any given time is:
a. Nitrogen dioxide
b. Carbon dioxide
c. Ozone
d. Sulfur dioxide
The chemical used as a measure of the oxidant level of the atmosphere at any given time is ozone (c).
Ozone is a powerful oxidizing agent and is used as an indicator of the overall oxidant level in the atmosphere.Ozone is a highly reactive gas that is formed by the action of sunlight on oxygen molecules. It is a powerful oxidant and is often used as a measure of the oxidant level of the atmosphere. High levels of ozone in the atmosphere can cause respiratory problems, especially in people with asthma or other respiratory illnesses. Nitrogen dioxide (a), carbon dioxide (b), and sulfur dioxide (d) are not used as measures of the oxidant level of the atmosphere.
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