what is unique about the spectrum obtained for a fluorescent light
Answers
The fluorescent light is unique in the spectrum it obtains because it emits light at a specific frequency and does not emit a continuous spectrum.
It generates a discrete line spectrum consisting of narrow emission lines at particular wavelengths. A type of light known as a fluorescent light absorbs ultraviolet (UV) light to produce visible light. This radiation isn't noticeable to the natural eye since it has a more limited frequency than apparent light. A phosphorescent material-coated tube is how the fluorescent light works.
The cylinder is loaded up with a low-pressure gas, ordinarily mercury fume, and a limited quantity of argon gas. The gas becomes excited when an electric current is applied to the tube, causing it to produce ultraviolet light. After absorbing the ultraviolet light, the phosphorescent material on the tube re-emits it as visible light.
Because a fluorescent light generates a discrete line spectrum consisting of narrow emission lines at particular wavelengths, the resulting spectrum is unique.
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Related Questions
In general, foods high in saturated fatty acids are found in which food groups?
Select one:
a. Fruits and vegetables
b. Milk and meat
c. Vegetable oils
d. Starches and breads
Answers
In general, foods high in saturated fatty acids are found in milk and meat food groups (Option B).
What are saturated fats?Saturated fats are those that are solid at room temperature and have no double bonds between their carbon atoms. Saturated fats are commonly found in foods of animal origin, such as fatty beef, pork, and poultry, as well as in butter, cheese, and other dairy products.
Lipids that are solid at ambient temperature are known as saturated fatty acids. They are present in meat and dairy products, including cheese, milk, and butter, as well as some plants, including coconut oil, cocoa butter, and palm oil. Foods high in saturated fats are usually of animal origin and are linked to an increased risk of heart disease.
Thus, the correct option is B.
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If a solution is saturated and more salt that is added falls to the bottom of the container what is it called?
A: Supersaturated
B: Saturated
C: Unsaturated
Answers
Answer:
The answer is B
Explanation:
A solution that contains a relatively low concentration of solute is called dilute, and one with a relatively high concentration is called concentrated. If we add more salt to a saturated solution of salt, we see it fall to the bottom and no more seems to dissolve.
What's the meaning of love?
Answers
Answer: Love is when you feel like you can touch the sky when your around that person, when your at your best self or that person and when you put their needs before yours because your needs just don't matter. When you feel like you can't stop thinking about that person or you can stop smiling when you think of them. Its when you feel this warm, safe feeling when your around them. And if you really love them then my answer should be true for you.
Explanation:
because iv'e felt and have been in love before....
Answer:
Love is an intense, deep affection for another person. Love also means to feel this intense affection for someone. Love can also refer to a strong like for something or to like something a lot. Love has many other senses both as a verb and a noun
What is the approximate radius of a 12 Cd nucleus? Express your answer to two significant figures and include the appropriate units.
Answers
The approximate radius of a 12 Cd nucleus is 2.75 femtometers (fm).
The radius of a nucleus can be estimated using the empirical formula given below:
R = r₀ × A¹⁾³
R is the radius of the nucleus,
r₀ is a constant,
A is the mass number (the number of protons and neutrons) of the nucleus.
For a 12 Cd nucleus, A = 12 (the mass number of Cadmium).
The constant r₀ is approximately 1.2 femtometers (1.2 fm).
Now, substituting the values into the formula:
R = (1.2 fm) × (12)¹⁾³
R = 1.2 fm × 2.29
R = 2.75 fm
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in which sell duplet rule is applied, why?
Answers
Answer:
its in explanationExplanation:
the tendency for items have 2 electrons in their outermost shell by interacting with others items through electron sharing or transfer is known as duplet rule. if an atom has 2 electrons in it's outermost shell then it is called duplet rule and if a 8 electrons in it's outermost shell than it is called octet rule .
A 5.72-L football is filled with air at 1.85 atm. At the same temperature, the volume of the football is reduced to 2.13 L. What is the pressure of air in the ball?
Answers
Answer:
4.97 atm
Explanation:
P2=V1P1/V2
I know this is correct because P and V at constant T have an inverse relationship.
- Hope that helps! Please let me know if you need further explanation.
what is atomic radius periodic table
Answers
For example:
The atomic radius of Na is smaller than the atomic radius of Cl. However, the atomic radius of Ts is larger than the atomic radius of Cl
identify the most likely cause of earthquakes that occur in the area shown on the map
Answers
The most likely cause of earthquakes that occur in the area shown on the map is due to fault lines in the earth's crust.
What are earthquakes?Earthquakes are natural phenomena characterized by the shaking or trembling of the Earth's surface.
They occur due to the sudden release of energy in the Earth's crust along fault lines, which creates seismic waves that propagate through the Earth.
The Earth's crust is composed of several large tectonic plates that float on the semi-fluid layer of the Earth's mantle.
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Arrange the amino acids coded for in the translation portion of the interactive in the correct order, starting with the first amino acid at the top.a. leucine b. histidine c. glycine d. methionine
Answers
The correct order for the amino acids is:
d. methionine
a. leucine
b. histidine
c. glycine
This order is determined by the sequence of nucleotides in the mRNA molecule, which is transcribed from the DNA template. The sequence of nucleotides in the mRNA molecule determines the sequence of amino acids in the protein that is synthesized during translation. The process of translation begins with the recruitment of a ribosome to the mRNA molecule, and the addition of a special amino acid called methionine to the growing protein chain. The ribosome then moves along the mRNA molecule, adding one amino acid at a time to the growing protein chain, in a sequence determined by the sequence of nucleotides in the mRNA molecule. In this case, the first amino acid added to the protein chain is methionine, followed by leucine, histidine, and glycine.
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The correct order for the amino acids is:
d. methionine
a. leucine
b. histidine
c. glycine
This order is determined by the sequence of nucleotides in the mRNA molecule, which is transcribed from the DNA template. The sequence of nucleotides in the mRNA molecule determines the sequence of amino acids in the protein that is synthesized during translation. The process of translation begins with the recruitment of a ribosome to the mRNA molecule, and the addition of a special amino acid called methionine to the growing protein chain. The ribosome then moves along the mRNA molecule, adding one amino acid at a time to the growing protein chain, in a sequence determined by the sequence of nucleotides in the mRNA molecule. In this case, the first amino acid added to the protein chain is methionine, followed by leucine, histidine, and glycine.
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salts are composed of both cations and anions, both of which can potentially affect ph. which of the following salts would you test if you wanted to observe how just anions affect ph? group of answer choices nach3coo cacl2 nahco3 tris-hcl na2co3 nh4cl
Answers
The salt which you would test if you wanted to observe how just anions affect pH is Na2CO3.
What is salt? Salts are inorganic compounds made up of a cation and an anion. Salts are formed by the neutralization of an acid with a base, for example, hydrochloric acid and sodium hydroxide form table salt: NaCl. The cation is typically a metal or a positively charged organic compound, whereas the anion is generally a non-metal or a negatively charged organic compound. The salt's properties are a function of the cation and anion and are hence unique.
Salt's effect on pH: Salts are made up of cations and anions, both of which can have an impact on pH. Cations and anions can both have an impact on the pH of the solution, but they can do it in different ways. The pH of a solution can be affected by the anion of the salt since it can act as a base or an acid. The pH of a solution can be affected by the cation of the salt since it can act as an acid or a base. For instance, if we dissolve copper sulfate in water, the pH of the solution will be acidic since the sulfate ion will be hydrolyzed to create sulfuric acid, H2SO4.
However, if we dissolve sodium carbonate in water, the pH of the solution will be basic because the carbonate ion acts as a base, picking up H+ ions from water molecules to generate HCO3- ions. Hence, Na2CO3 is the salt which you would test if you wanted to observe how just anions affect pH.
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FIRST TO ANSWER GETS BRAINLIEST! :)
Answers
C- main sequnce
Regulus A is a binary star consisting of a blue-white main sequence star of spectral type B7V, which is orbited by a star of at least 0.3 solar masses, which is probably a white dwarf. The two stars take approximately 40 days to complete an orbit around their common centre of mass.
which of the following is a type of physical weathering? group of answer choices thermal expansion dissolution oxidation hydration
Answers
Thermal expansion is a type of physical weathering, where rocks are broken down by changes in temperature.
Physical weathering is a type of weathering that involves the breakdown of rocks and other materials on the Earth's surface. Physical weathering occurs when rocks are broken down into smaller pieces through the action of physical processes. These processes can include the effects of temperature, pressure, and mechanical forces.
Thermal expansion is a process in which a material expands as it is heated. This process occurs because the molecules in the material begin to move more rapidly as they are heated, causing them to spread out and take up more space. This can cause the material to become distorted or deformed.
When this process occurs in rocks and other materials on the Earth's surface, it can cause them to crack and break apart, which is a form of physical weathering.
Dissolution is the process of breaking down a substance into smaller particles. This process is a form of chemical weathering, not physical weathering. Oxidation is also a form of chemical weathering, in which a substance reacts with oxygen to produce a new substance. Hydration is the process of adding water to a substance. This can cause the substance to expand or change in other ways, but it is not a form of physical weathering.
Therefore thermal expansion is a type of physical weathering, which involves the breakdown of rocks without any chemical changes.
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how long does it take for a plastic bag to decompose
Answers
It can take hundreds of years for a plastic bag to decompose.
Plastic bags are made from synthetic polymers, which are materials that do not biodegrade easily. In the environment, plastic bags can break down into smaller and smaller pieces, but they never completely disappear. In ideal conditions, a plastic bag can take anywhere from 10 to 1000 years to decompose, but the exact amount of time depends on a number of factors such as the type of plastic, exposure to sunlight and heat, and presence of other decomposers like bacteria and fungi.
Because plastic bags do not decompose quickly, they can persist in the environment for a long time and cause problems for wildlife, ecosystems, and human health. For this reason, many communities have implemented plastic bag reduction and recycling programs to help reduce their impact on the environment.
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.
Three students are asked to discuss why the CO2 produced from the reaction
rose upward out of the mouth of the test tube even though CO2 is denser than
air. Select the student that employs correct scientific reasoning.
Student 1: The reason the carbon dioxide rose despite being denser than air is because the heat
caused it to condense.
• Student 2: The carbon dioxide produced by decomposition of baking soda was able to rise above
the air because the oxygen in the test tube was consumed.
• Student 3: The carbon dioxide rose up because the heat expanded the gas and it became less
dense.
O Student 3
OStudent 1
O Student 2
Answers
Answer:
Student 3
Explanation:
This question lets us know something about how the density of a gas varies with temperature.
When a gas is heated, its molecules spread out and expand. When this happens, the volume of the gas increases. Remember that density is defined as mass/volume. Thus as the volume increases, the density of the gas decreases.
Therefore, the carbon dioxide rose up because the heat expanded the gas and it became less dense.
consider a solution made from a nonvolatile... consider a solution made from a nonvolatile solute and a volatile solvent. which statement is true? multiple choice the vapor pressure of the solution is always greater than the vapor pressure of the pure solvent. the boiling point of the solution is always greater than the boiling point of the pure solvent. the freezing point of the solution is always greater than the freezing point of the pure solvent.
Answers
The correct statement is "the boiling point of the solution is always greater than the boiling point of the pure solvent." When a nonvolatile solute is added to a volatile solvent, the vapor pressure of the resulting solution is lower than that of the pure solvent.
This is known as vapor pressure depression. As a result, the boiling point of the solution is raised above that of the pure solvent, as more energy is required to reach the higher boiling point. Similarly, the freezing point of the solution is lowered below that of the pure solvent, as the nonvolatile solute disrupts the formation of the pure solvent's crystal lattice.
This is known as freezing point depression. Therefore, the correct option is the second statement: "the boiling point of the solution is always greater than the boiling point of the pure solvent."
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Please help thank you!
Answers
Saturated steam at 0. 276MPa (Tsat-1310C) flows inside a steel pipe having an inside diameter of 2. 09cm and an outside diameter of 2. 67cm. The convective heat transfer coefficients on the inner and outer pipe surfaces may be taken as 5680 W/m2 K and 22. 7W/m²K respectively. The surrounding air is at 294K. Find the overall heat transfer coefficient, U. (W/m. K) and heat loss per meter (W/m) of this bare pipe. If now this pipe is covered with 3. 8cm thickness of 85% magnesia insulation, find the new overall heat transfer coefficient U beat loss of this pipe per m length and thereby estimate the percent reduction in heat loss due to insulation Take k values of steel=42. 9W/mK and 85% magnesia=0. 0675W/m. K
Answers
The overall heat transfer coefficient, U, is the sum of the individual heat transfer coefficients on the inner and outer surfaces of the pipe. To find U, we need to calculate the individual heat transfer coefficients and then sum them.
First, let's calculate the individual heat transfer coefficient on the inner surface of the pipe. We can use the convective heat transfer coefficient formula:
h_inner = 5680 W/m^2 K
Next, let's calculate the individual heat transfer coefficient on the outer surface of the pipe. Again, we can use the convective heat transfer coefficient formula:
h_outer = 22.7 W/m^2 K
Now, let's find the overall heat transfer coefficient, U:
U = (1 / h_inner + 1 / h_outer)^-1
Substituting the values we have:
U = (1 / 5680 + 1 / 22.7)^-1
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Which balanced chemical equation contains the correct product(s) for the reaction of rubidium
(Rb) solid with chlorine (C12) gas? (2 Points)
A. Rb(s) + Cl₂(g) → RbCl₂(s)
B. Rb(s) + Cl₂(g) → RbCl(s) + Cl(g)
C. 2 Rb(s) + Cl₂(g) → 2 RbCl(s)
D. 2 Rb(s) + 3 Cl₂(g) → 2 RbCl₂(s) + 2 CI(g)
Answers
The equilibrium chemical equation Rb(s) + Cl₂(g) RbCl₂(s) has the appropriate product(s) for the reactivity of rubidium.
What is Mg S)+ Cl2 G MgCl₂ S's balanced chemical equation?Magnesium chloride (MgCl₂) is created when the elements magnesium (Mg) and chlorine (Cl₂) mix. As a result, the reaction is a combination reaction, and the equation that balances it is as follows: Mg(s)+Cl₂(g)→MgCl₂(s)
What is Cl₂'s reaction ?For instance, salt chlorate, a typical household bleach, is created when chlorine, Cl₂, interacts with sodium hydroxide, NaOH, in a disproportionation process. Sodium and chlorine combine to make sodium chloride, a common table salt.
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Consider a group of 5 students, each of whom makes a potassium chloride (74.55 mol/g) solution in the lab. Individually, each student weighs out an amount of sodium chloride and a volume of water, according to the following table. Use this information to calculate the solution concentration (in moles/liter) each student makes, the average concentration, and the standard deviation for the concentration.
fill out the chart pls
Answers
Normal Concentration = 18.09 moles/L Standard Deviation = 1.89 moles/L
What is Concentration?The capacity for sustained attention on a single thing, activity, or work without being sidetracked is known as concentration. It is the key to success in most endeavors, as it requires a person to ignore any extraneous thoughts, feelings, or stimuli and instead focus on the task at hand. Concentration is a mental skill that can be developed and improved with practice, such as with mindfulness, meditation, and various cognitive exercises. Concentration can also be adversely affected by poor physical health, lack of sleep, and stress, so it is important to maintain a healthy lifestyle if one wants to stay focused.
Student | Weight (g) | Volume (L) | Concentration (moles/L)
1 | 5.0 | 0.25 | 19.82
2 | 8.0 | 0.50 | 15.89
3 | 4.0 | 0.20 | 20.23
4 | 7.0 | 0.30 | 18.52
5 | 6.0 | 0.40 | 16.96
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Predict the sign of DSsurr for the following processes.
a. H2O(l) → H2O(g)
b. I2(g) →I2(s)
Answers
For process a, H2O(l) → H2O(g), the sign of DSsurr is expected to be positive.
For process b, I2(g) → I2(s), the sign of DSsurr is expected to be negative.
For process a, H2O(l) → H2O(g), the sign of DSsurr is expected to be positive. This is because the reaction involves a phase change from liquid to gas, which generally leads to an increase in disorder and randomness of the system. As a result, the surroundings are expected to experience an increase in entropy, leading to a positive value for DSsurr.
For process b, I2(g) → I2(s), the sign of DSsurr is expected to be negative. This is because the reaction involves a phase change from gas to solid, which generally leads to a decrease in disorder and randomness of the system. As a result, the surroundings are expected to experience a decrease in entropy, leading to a negative value for DSsurr.
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A compound has an empirical formula BH3 and a molar mass of 27.6 g/mol. What is the molecular formula of the
compound?
Answers
The molecular formula of the compound having an empirical formula BH₃ and a molar mass of 27.6 g/mol is B₂H₆.
Empirical formula is the whole number ratio of the atoms which are present in the compound.
Molecular formula is the number of atoms of each element present in one molecule of compound.
Given -
Empirical formula = BH₃
Molar mass = 27.6 g/mol
We must find the empirical mass of the compound,
Molar mass of B = 10.8 amu
Molar mass of H = 1.00 amu
Therefore,
Empirical mass = 10.8 amu + (3 x 1.00) amu = 13.8 amu
To find molecular formula, we divide the molecular mass by the empirical mass. So,
Molecular formula = Molecular mass
Empirical mass
Molecular formula = 27.6
13.8
Molecular formula = 2
Hence, the molecular formula of the compound is BH₃ = B₁ₓ₂H₃ₓ₂ = B₂H₆
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Which organism obtains energy without depending on another organism
Answers
Answer:
Plants
Explanation:
can anyone please help with this? 20 points
Answers
Answer: I think its c or d
Explanation:
a 15.0 ml solution of ba(oh)₂ is neutralized with 22.7 ml of 0.200 m hcl. what is the concentration of the original ba(oh)₂ solution?
Answers
The concentration of the original Ba(OH)₂ solution if 15.0 ml solution of Ba(OH)₂ is neutralized with 22.7 ml of 0.200 m HCl is 151.3 mol/dm³
To determine concentration of the original Ba(OH)₂ solution, we must know he balanced chemical equation for the neutralization reaction is:
Ba(OH)₂ + 2HCl → BaCl₂ + 2H₂O
From the equation above, the stoichiometric ratio of Ba(OH)₂ and HCl is 1:2. That means one mole of Ba(OH)₂ reacts with 2 moles of HCl. The balanced chemical equation also shows that the number of moles of HCl used is the same as the number of moles of Ba(OH)₂. Hence:
moles of HCl = 0.200 mol/dm³ × 22.7 dm³ = 4.54 mol
Using the stoichiometric ratio, the moles of Ba(OH)₂ in the solution can be calculated to be:
moles of Ba(OH)₂ = 4.54 mol ÷ 2 = 2.27 mol
The volume of the Ba(OH)₂ solution is 15.0 mL, which is 0.015 dm³. Therefore, the concentration of the original Ba(OH)₂ solution can be calculated as:
concentration = moles/volume= 2.27 mol ÷ 0.015 dm³= 151.3 mol/dm³
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The concentration of the original Ba(OH)₂ solution is 0.302 M.
Given data
Volume of Ba(OH)₂ solution used = 15.0 ml
Volume of HCl used = 22.7 ml
Molarity of HCl solution used = 0.200 M
We need to calculate the concentration of Ba(OH)₂ solution, which is not known.Molar ratio of HCl and Ba(OH)₂ in a balanced chemical equation of their neutralization is;
HCl + Ba(OH)₂ → BaCl₂ + 2H₂O
The balanced chemical equation tells us that 1 mole of HCl is required to neutralize 1 mole of Ba(OH)₂.
So, the moles of HCl used in the reaction is;
moles of HCl = molarity × volume (in liters)
moles of HCl = 0.200 M × 0.0227 L = 0.00454 mole
Since one mole of HCl reacts with 1 mole of Ba(OH)₂,
so the number of moles of Ba(OH)₂ used is also equal to 0.00454 mole. Since we know the volume of the Ba(OH)₂ solution used, we can calculate the molarity of the solution as;
molarity = moles of solute / volume of solution in liters
Molarity = 0.00454 / (15.0 / 1000) = 0.302 M
Therefore, the concentration of the original Ba(OH)₂ solution is 0.302 M.
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What are three concepts that you may explore while learning in a physical science course?
Answers
3. An object that has a volume of 2500 cm³ is dropped into a vat of corn syrup. What is the buoyant force on the object? (The density of corn syrup is 1.38 g/cm³.)
Answers
Answer:3.381 X 10^(-11)
Explanation:
The formula for buoyant force is F = -Volume*density*gravitational acceleration. Convert volume and density to SI units and then apply them in the formula where gravitational acceleration is 9.8m/s^2. Done
consider the structure of lorazapam. provide numbers only, 6, not six. how many lone pairs does the complete lewis structure have?
Answers
The complete Lewis structure of Lorazepam has 6 lone pairs.
Lewis structures, also known as Lewis dot formulas, electron dot structures, or Lewis electron dot structures, are diagrams that depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
Lorazepam is a medication used to treat insomnia and anxiety. The time it takes for lorazepam to start working can vary based on the form it is taken in. Specifically, there are a total of 6 lone pairs in the molecule, with two on each of the oxygen atoms and one on each of the nitrogen atoms.
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identify the conditions for a standard electrochemical cell. select one or more: pressure of 1 atm temperature of 298 k solution concentrations of 1 m pressure of 5 atm solute masses of 1 g temperature of 273 k
Answers
The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.
The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.
There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.
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How many milliliters of an aqueous solution of 0.123 M zinc chloride is needed to obtain 6.57 grams of the salt ?
Answers
The correct is 409 ml of aqueous solution of 0.123 M zinc chloride is needed to obtain 6.57 gm of salt.
To calculate the volume of the aqueous solution a certain mass of zinc chloride needs to be obtained, the molarity (M) and the molar mass of zinc chloride (ZnCl₂) will b used.
Calculating the number of moles of zinc chloride:
moles = \(\frac{mass}{molar mass}\) .............(1)
The molar mass of zinc chloride (ZnCl₂) will be calculated as follows:
M(ZnCl₂) = M(Zn) + 2 X M(Cl)
The atomic masses of zinc (Zn) and chlorine (Cl) are in the periodic table.
M(Zn) = 65.38 g/mol
M(Cl) = 35.45 g/mol
Hence,
M(ZnCl₂) = 65.38 + 2 x 35.45
= 136.28 g/mol
Now, we can calculate the number of moles:
moles = \(\frac{6.57}{136.28}g/mol\)
Now after calculating the number of moles, calculate the volume using the molarity:
volume = \(\frac{moles}{molarity}\)
Given information:
Molarity = 0.123 M
Moles = 6.57 g / 136.28 g/mol (from step 1)
Therefore,
volume = \(\frac{\frac{6.57 }{ 136.28}}{0.123 }\) =0.409 L
Now calculate the volume in milliliters (ml) by multiplying the volume in liters by 1000:
volume (ml) = volume (L) x 1000
= 409 mL
Therefore 409 mL of an aqueous solution is needed to obtain 6.57 grams of salt.
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The equation of line v can be written as x+4y=16. Line w, which is parallel to line v, includes the point (−8,4). What is the equation of line w?
Write the equation in slope-intercept form with no spaces. Write the numbers in the equation as simplified proper fractions, improper fractions, or integers.
Answers
the equation of line w is y = -(1/4)x + 2. To solve for the equation of line w, we first need to find the slope of line v. The slope of line v can be found by subtracting the y-coordinates of two points on the line and dividing by the difference of the x-coordinates of those same two points.
In this case, we can use the points (-8, 4) and (0, 0). The slope of line v is then:
m = (4 - 0) / (-8 - 0) = -1/4
We know that line w is parallel to line v, so it will have the same slope. The slope-intercept form of a line is y = mx + b, where m is the slope and b is the y-intercept. We can plug in the slope of line w, which is -1/4, and the point (-8, 4), which is on line w, to solve for b. This gives us:
y = -(1/4)x + b
4 = -(1/4)(-8) + b
4 = 2 + b
b = 4 - 2
b = 2
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