We won't be able to use Polaris to determine the latitude if we are present south of the equator because from the south we can't see the Polaris.
How we can determine latitude?We can determine latitude by measuring the angle of the North Star, which is called Polaris that is present above the horizon. There is no similarity to Polaris in the South, but to find your latitude if you are in the Southern hemisphere you can use a band, called the Southern cross and two stars called the Southern Pointers. Polaris cannot be seen from the south of the circuit. The altitude of a star is the estimation in degrees of the angle of the star above the horizon. which has an unusual name, the zenith. Polaris is used to determine the star is by no means the brightest star in the sky, and cannot help you determine longitude at all, as it is always on the meridian.
So we can conclude that Polaris is pointing directly toward the north pole there is no equivalent of Polaris in the South.
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How does quantum theory relates to Nanoparticles in Medicine please provide as much info as possible need help ASAP
Certain metal-based nanoparticles have the potential to interact with the hydrogen peroxide found in every cell and change it into a hydroxyl radical that can enter the nucleus and cause DNA damage.
What purposes do nanoparticles serve?Scratch-resistant eyewear, crack-resistant paint, anti-graffiti coatings for walls, transparent sunscreen, stain-repellent fabrics, self-cleaning windows, and ceramic coatings for solar cells are all products made with nanoparticles today.
Where can one find nanoparticles?In addition to living matter, naturally produced nanoparticles can also be found in volcanic ash, ocean spray, fine sand, and dust (e.g. viruses). The diversity of synthetic nanoparticles is on par with that of its counterparts in nature, if not greater.
Are nanoparticles accepted by the FDA?The usage of nanoscale materials in medications, medical devices, biologics, cosmetics, and food is anticipated to rise significantly in the coming years, according to the FDA, which has already assessed and authorized a few nanotechnology-based items.
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Which gas will need the slowest time to get out of a gas syringe?
The gas that will need the slowest time to get out of a gas syringe is helium.
Helium is the second lightest element, and it has a low boiling point of -456°C. As such, it will take longer than any other gas to escape from a gas syringe.
Helium is a noble gas and is less reactive than other gases, so it will not react with the needle as quickly. Helium also has low conductivity, which means it takes less energy to transport helium through an object than it does for other gases. In addition, helium is odorless and tasteless, so it won't create any unwanted odors or smells when you use it in your experiments.
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Calculate the mass in kilograms for
204 mol BrCl3
The molar mass of Br is 79.904 grams/mole and the molar mass of Cl is 35.453 grams/mole.
There are 3 Cl atoms so we'll multiply it's molar mass by 3. So:
35.453 x 3 = 106.359
Now we add this number to the molar mass of Br and we get:
106.359 + 79.904 = 186.263
The molar mass of BrCl3 is 186.263 grams/mole
Now we just multiply this number by the amount of moles in the question which is 204.
186.263 x 204 = 37997.652 g which is 37.997652 kg or 38.0 kg if significant figures are important.
Which of the following is an example of a heterogeneous mixture? *
a teaspoon of sucrose
a gold ring
a handful of pebbles
O a pot of salted pasta water
A pot of salted pasta water is an example of a heterogeneous mixture.
Heterogenous mixture :If a mixture's composition varies over the course of the mixture, it is said to be heterogeneous. Vegetable soup is a complex concoction. The proportions of the different vegetables and other ingredients will vary from mouthful to mouthful. Mixtures that contain two or more phases are said to be heterogeneous. Examples include ice cubes in a beverage, sand and water, and salt and oil.
What is a homogeneous mixture?A homogenous mixture is one whose composition is constant across the entire mixture. Because the soluble salt is distributed evenly throughout the whole salt water sample, the salt water described above is homogenous.
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Which of these is the source of the energy that plant cells use for photosynthesis?
Choose the correct answer.
Responses
radiant energy from the sun
radiant energy from the sun
kinetic energy from the wind
kinetic energy from the wind
potential energy from the soil
potential energy from the soil
mechanical energy from animals
Radiant Energy from the sun is the source of the energy that plant cells use for photosynthesis. The first response is the correct answer.
Nearly all of the energy on Earth comes from the sun. Through a process known as photosynthesis, it enables plants and other organisms to convert water and carbon dioxide into sugars.
The function of sunlight in photosynthesis is to supply energy. Heat and light are two different types of energy that the sun emits.
Chlorophyll can capture energy, which can then be converted into sugar during photosynthesis. Photosynthesis slows down when a plant receives insufficient sunlight. This implies that the plant's energy source—sugar—might not be getting to it in sufficient amounts. We can clearly see how crucial sunlight is to life.
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How are liquid volume measured? In other words, what are the SI units for liquid volume?
We can measure the volume of a liquid by using the graduated cylinder and the SI unit which is used for the liquid volume is cubic meter (m3).
How can we measure the volume of liquid?Simply we can find or measure the volume of a liquid by using either a graduated cylinder or with the help of the burette. As this is clear from the name of the graduated cylinder is that cylinder in which we can measure the volume of a liquid. The graduated cylinder is sealed from one end and opened from the other side. The scales are also drawn on the graduated cylinder for finding the values.
The SI unit which is used for the liquid volume is called a cubic meter (m3). It is a derived unit. Liter (L) is a special name for the cubic decimeter (dm3). The symbol for the liter is the uppercase letter “ell” (L) is desired to keep away from the danger of misunderstanding among the lowercase letter “ell” (l) and the number one (1).
So we can conclude that graduated cylinder is used for measuring the volume of a liquid and the liquid volume is cubic meter (m3).
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Are animal cells prokaryotic or eukaryotic .
Are plant cells prokaryotic or eukaryotic .
If 100 mg of ferrocene is reacted with 75 mg of anhydrous aluminum chloride and 40 microliters of acetyl chloride and 100 mg of product is isolated, what is the percent yield assuming the product is only mono acetylferrocene? answer with just the number and no % sign.
Assuming that the product is only mono acetylferrocene, the percentage yield is 81.3%.
Ferrocene reacts with Acetyl chloride in the presence of anhydrous aluminum chloride to produce mono acetylferrocene.
Here, anhydrous aluminum chloride is only present as a catalyst, It does not participate in the reaction so we will not take it into our calculations.
So, in order to calculate the theoretical yield of the product let us find out the moles of ferrocene and acetyl chloride, so that we can find out on whose concentration the product is depending.
Moles = given mass of compound/molar mass of compound.
So, number of moles of ferrocene,
Molar mass of ferrocene = 186.04g.
Mass of ferrocene reacted = 100mg = 0.1g.
Moles of ferrocene = 0.1/186.04 = 0.0005373 moles.
Moles of acetyl chloride,
Volume of acetyl chloride = 40 microliters = 0.04 milliliters.
We know that,
Density = mass/volume
Density of acetyl chloride = 1.1gram per meter cube.
Mass of acetyl chloride = 1.1 × 0.04
Mass of acetyl chloride = 0.044g
Molar mass of acetyl chloride = 78.49g.
Moles of acetyl chloride = 0.044/78.49
Moles of acetyl chloride = 0.0005375
As we can see, the number of moles of ferrocene are present in less amount, so ferrocene is controlling the yield of mono acetylferrocene.
Moles of ferrocene = Moles of mono acetylferrocene.
Molar Mass of mono acetylferrocene = 228.07 g
Now,
0.0005375 = m/228.07
m = 0.0005375 × 228.07
m = 0.123 grams.
Mass of mono acetyl ferrocene formed theoretically is 0.123grams.
Experimental yield = 100mg = 0.1 grams.
Percentage yield = experimental yield/theoretical yield × 100
Percentage yield = 0.1/0.123 × 100
Percentage yield = 81.3%
So, the percentage yield of the product is 81.3%
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The law of _____ states that the mass of the reactants will equal the mass of the products.
conservation of energy
conservation of mass
conservation of momentum
inertia
The law of conservation of mass states that the mass of the reactants will equal the mass of the products.
What is the law of conservation of mass?The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.Physical and chemical changes can cause matter to transform into different forms, but no matter what happens, matter is always conserved. There is no creation or destruction of matter; the amount of matter is the same before and after the transformation.To learn more about : the law of conservation of mass
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Order the following regions of the EM spectrum from lowest to highest energy: infrared, microwaves, ultraviolet, visible, X-rays, gamma rays
In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Which comes first in terms of energy, X-rays, radio waves, or microwaves?Radio waves lack the energy that microwaves do. There are even more in infrared, which is followed by visible, ultraviolet, X, and gamma rays.
In general, the electromagnetic spectrum is split into seven sections, rising in energy and frequency and decreasing in wavelength. Radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays are some of the popular names for these phenomena.
Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, and gamma rays are the seven different forms of waves. Gamma rays have the shortest wavelength and the highest frequency, whereas radio waves have the longest wavelength and lowest frequency.
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Tasha and Marco examine a cell through a microscope. Tasha suggests that the cell is a protist. Marco thinks it might be a bacterium. What evidence would prove Tasha right?
The evidence that might prove Tasha is right if she and Marco examine a cell through a microscope and Tasha suggests that the cell is a protist is the presence of organelles and cell nucleus.
What is a eukaryotic cell?A eukaryotic cell such as observed in protists contains organelles and a cell nucleus where the genetic material is found compartmentalized, conversely to bacteria which are prokaryotic cells that do not contain a cell nucleus nor membrane-bound organelles.
Therefore, with this data, we can see that eukaryotic cells contain cell nuclei and organelles.
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In the first reaction of the citric acid cycle, oxaloacetate, which contains blank______ carbons, is combined with acetyl-coa, which contains blank______ carbons in its acetyl group, to produce citric acid, which contains blank______ carbons.
Four-carbon, four-carbon, four-carbon molecule.
What is citric acid cycle?In eukaryotes, the citric acid cycle occurs in the matrix of mitochondria, as does the conversion of pyruvate to acetyl-CoA. In prokaryotes, these two steps occur in the cytoplasm. The citric acid cycle is a closed loop; the last part of the pathway re-forms the molecule used in the first step. There are eight main steps in the cycle.
In the first step of the cycle, acetyl-CoA combines with a four-carbon acceptor molecule, oxaloacetate, to form a six-carbon molecule called citrate. After a rapid rearrangement, this six-carbon molecule releases two of its carbons as carbon dioxide molecules in two similar reactions, each time releasing a molecule of NADH.
Start superscript, 1, end superscript. The enzymes that catalyze these reactions are important regulators of the citric acid cycle, speeding it up or slowing it down depending on the energy requirements of the cell^2 2
squared.
The remaining four-carbon molecule undergoes a series of further reactions that first produce a ATP molecule-or, in some cells, a similar molecule called GTP and then the electron carrier FAD to for_2FADH 2, start subscript, 2, end subscript, and finally generation of another NADH. This reaction sequence regenerates the starting molecule oxaloacetate, allowing the cycle to be repeated.
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a volume of 35.60 ml of 0.2255 m sodium hydroxide was required to completely react with 19.90 ml of phosphoric acid solution. find the molarity of the phosphoric acid solution
M(molarity of the phosphoric acid solution)=0.13 mole/L
molarity is a measure of the concentration of solute in a solution.
EQUATION OF BALENCE REACTION---->
3NaOH + H3PO4 ---->Na3PO4+3H2O
n MOLE OF NaOH REQUIED n/3 MOLE OF H3PO4 to completely react.
formula required to find the molarity is
n= number of mole
M= molarity
V= volume
n=M×V
n= 0.2255 m×35.60 ml
n= 8.02 m mole.
and, mole of H3PO4 to completely react = n/3
=8.02 /3
=2.67 m mole
now, according to question-->
2.67 m mole=M×19.90 ml
concentation of the solute in phosphoric acid solution is 0.13 mole/L
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compare and contrast the arrangements of particles at the atomic level for a liquid and a solid
The arrangements of particles at the atomic level for a liquid and a solid are compared as the particles in gas do not follow any specific order and are uniformly spaced out.
There is no regular arrangement of liquids next to one another. The solids are regularly arranged and closely packed. Since liquid particles are more dispersed than solid ones, they take on the shape of their container rather than having a distinct shape yet having a distinct volume. Because solid particles are more closely packed together and certain solids even have atomic-level particle patterns, they have a distinct shape that does not alter unless the solid changes state.
The arrangement of the particles in a liquid is more haphazard than that of the particles in a solid. But since they are closely packed, the atoms of solids and liquids are comparable.
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suppose you have 50.0 ml of a solution of hcl of unknown concentration. you use a 0.10m solution of ca(oh)2 as titrant and it requires 13.5 ml of this titrant to reach the endpoint. what was the original ph of the unknown solution?
The pH value of the unknown solution that underwent titration was 1.27.
First, we write the balanced reaction equation between HCl and calcium hydroxide:
[tex]2HCl + Ca(OH)_{2}[/tex] → [tex]CaCl_{2} + 2H_{2}O[/tex]
So we know that 1 mole of calcium hydroxide reacts with 2 moles of HCl. We now calculate the amount of calcium hydroxide used in the titration:
c = n/V ⇒ n = V*c = 0.0135 L * 0.10 M = 0.00135 mol
The amount of HCl will be twice the amount of calcium hydroxide, so 2 * 0.00135 mol = 0.0027 mol.
We can now calculate the concentration of HCl in the original solution (and, because HCl is a strong monoprotic acid, the concentration of H+ ions will be equal to the concentration of HCl):
c = n/V = 0.0027 mol / 0.05 L = 0.054 M
pH value is a negative logarithm of concentration of H+ ions:
pH = -log0.054 = 1.27
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P4O10 + H2O —>
what are the products
Answer:
P4O10 + H2O → H3PO4
Explanation:
independent variable and dependent variable
states with a larger population have more seats in the house of representative
Answer
Explanation:
Give the names of all of the above acids
1.What are the key components represented in the model shown in Figure 2?
2.What relationships are shown in the Figure 2 model?
1. The key component represented in the model is the Reflection of light.
2. Bouncing back of light relationships are shown in the Figure 2 model.
Reflection is when mild bounces off an item. If the surface is smooth and bright, like glass, water or polished metal, the light will reflect at the same angle as it hit the floor. This is known as specular reflection. light reflects from a clean floor on the same angle as it hits the floor.
In line with the law of reflection, the attitude of prevalence equals the perspective of reflection. To view an image of an object in a mirror, you should sight alongside a line at the photo area.
Reflection is the bouncing back of light while it moves a easy surface. Refraction is the bending of light rays whilst it travels from one medium to some other.
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Under conditions of extreme heat and pressure, sedimentary rock can transform into metamorphic rock. True or false?
Answer:
Sedimentary rocks like bituminous coal, limestone, and sandstone, given enough heat and pressure, can turn into nonfoliated metamorphic rocks like anthracite coal, marble, and quartzite. Nonfoliated rocks can also form by metamorphism, which happens when magma comes in contact with the surrounding rock
Explanation: THEREFORE I'D SAY TRUE!
what is the hybridization about a central atom that has three total electron groups, with two of those being bonding groups and one being a lone pair?
The shape becomes bent V-shaped AND, molecular geometry is a triangular planar shape.
In the hybridization model, the number of hybrid orbitals used by the central atom is the same as the number of electron groups around the central atom. Thus, 2 electron groups (linear) = sp hybridization
If there are only three total electron groups, holding the place where two of those are bonding groups and one is a lone pair. then the shape becomes bent V-shaped, 2 bonds and 1 lone pair the shape is bent. For sp² hybridized central atoms the only possible molecular geometry is a triangular planar shape.
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If the density of an unknown liquid is 2.6g/mL, what is the mass of 800mL of the unknown liquid
in grams (g)?
The mass of unknown liquid is 2080g.
Let us take formula for calculating density
Density = [tex]\frac{mass}{volume }[/tex]
therefore , mass = [tex]density\times volume[/tex]
= [tex]2.6\times 800[/tex]
= 2080 g.
What is mass?The mass is a quantitative measure of inertia in physics, a fundamental property of all matter. It is actually the resistance that a body of matter offers to change its speed or position under the influence of a force. The greater the mass of the object, the smaller the change caused by the force applied to it. In the International System of Units (SI), the unit of mass is the kilogram, which is defined as Planck's constant, which is defined as Planck's constant, which is equal to 6.62607015 × 10–3 joules per second. One joule equals one kilogram times one square meter per second.
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1 2 3 4 5 6 7 8 9 10 Which point on the number line represents the product (5) (negative 2) (negative 1)? A number line going from negative 11 to positive 11. Point A is negative 10, point B is negative 2, point C is 2, point D is 10. Point A Point B Point C Point D
Point on the number line represents the product point D
Number line is the pictorial representation of number on straight line called number line
Here given data is a number line in which 10 numbers are seen and this numbers are toward right side it represent positive numbers and toward left side it represent negative numbers so here the point d represent the product and point a represent the reactant so that's why point d which represent 10 are product
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In the electrolysis of molten magnesium chloride, the overall reaction is: MgCl2(l) → Mg(s) + Cl2(g) (a) Write the half reactions, (b) identify which species is being oxidized and which is being reduced, and (c) calculate the minimum voltage needed to separate magnesium chloride into its elements.
In the electrolysis of molten magnesium chloride;
a. the half reactions are as follows:
Reduction half reaction: Mg²⁺ + 2 e⁻ → Mg (s)
Oxidation half reaction: 2 Cl (aq) → Cl₂ (g)
b. magnesium ion is reduced whereas chloride ion is oxidized.
c The minimum voltage required to separate magnesium chloride into its elements is 386000 C of electricity.
What is electrolysis?Electrolysis is the decomposition of a substance known as an electrolyte when an electric current is passed through a solution or molten form of the substance.
During electrolysis, oxidation and reduction reactions occur that can be split into half equations.
In the electrolysis of molten magnesium chloride, the overall reaction is given below:
MgCl₂ (l) → Mg (s) + Cl₂(g)
a. The half reactions are as follows:
Reduction half reaction: Mg²⁺ + 2 e⁻ → Mg (s)
Oxidation half reaction: 2 Cl (aq) → Cl₂ (g)
b. Based on the half equations given above, the magnesium ion is reduced as it accepts two electrons to become a neutral magnesium atom. Chloride ion is oxidized as two chloride ions lose two electrons to become chlorine gas.
c The minimum voltage required to separate magnesium chloride into its elements is determined from the moles of electrons involved in the reaction.
Magnesium ion and chloride ions require two moles of electrons each to become the neutral element. Thus, 4 moles of electrons are required.
4 moles of electrons = 4 * 96500 C of electricity
4 moles of electrons = 386000 C of electricity.
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what type of dinosaur left foot prints?
its a cer graphic organizer
The term "ichnite" refers to preserved footprints, which are a sort of trace fossil and a window into of dinosaurs. They developed similarly to how our imprints do when we walk on squishy surfaces like mud.
What dinosaurs still exist now?Because they descended from the common ancestor of all dinosaurs, birds can be thought of as a living group of dinosaurs. There is no proof, however, that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive today, with the exception of birds.
Why did dinosaurs die out?Scientists already know that Earth was impacted by an asteroid or maybe a comet off the Mexico. Chicxulub, the subsequent 110-mile/80-kilometer wide crater, is assumed to have been the catalyst for the "impact winter" that wiped out the dinosaurs over a number of decades.
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"The higher the temperature of a gas at constant volume, the greater is its * 10 points
pressure." Which of the following kinetic-molecular explanations of this
principle is NOT correct?
O Molecules move faster at higher temperatures.
The number of molecular impacts per unit area decreases at a higher temperature.
The average kinetic energy of molecules is greater at a higher temperature.
O
The average momentum and rate of molecular collisions is greater at a higher
temperature.
The option that shows that the kinetic-molecular explanations of this principle is NOT correct is option B: The number of molecular impacts per unit area decreases at a higher temperature.
What is the kinetic-molecular theory?The assumption that matter is made up of microscopic particles that are always in motion forms the foundation of the kinetic-molecular theory, which explains the states of matter.
Therefore, based on the use of observable characteristics as well as the use of behaviors of solids, liquids, as well as gases are known to be explained by kinetic-molecular theory.
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4. What mass of magnesium oxide is formed when 96 g of magnesium reacts with
oxygen?
2Mg + O₂ → 2MgO
Answer:
The mass of MgO formed is 160g
Explanation:
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an atom of U-235 absorbs a neutron and produces an atom of Sb-123, four neutrons and an unknown nuclide, X. Write the decay equation to represent this reaction and identify the other nuclide, X, formed in this reaction
The decay equation to represent the nuclear fission reaction in which an atom of U-235 absorbs a neutron and produces an atom of Sb-123, four neutrons, and an unknown nuclide, X is given below:
²³⁵₉₂U + ¹₀n → ¹²³₅₁Sb + ¹⁰⁹₄₁X + 4 ¹₀n
The nuclide X is Niobium Nb-109.
What are nuclear reactions?Nuclear reactions are reactions that involve changes i the nuclear composition of the atom of elements involved in the reaction.
Nuclear reactions are of two types:
Nuclear fission - this involves the splitting of the nucleus of a heavy atom or large atoms into the nucleus of two or more lighter atoms.
Nuclear fusion - this is the process by which the nucleus of a heavy atom is produced as a result of the fusion or combination of the nucleus of atoms of two or more lighter elements.
The given reaction in which an atom of U-235 absorbs a neutron and produces an atom of Sb-123, four neutrons, and an unknown nuclide, X is an example of nuclear fission reaction.
The decay equation to represent this reaction and the other nuclide, X, formed in this reaction is given below:
²³⁵₉₂U + ¹₀n → ¹²³₅₁Sb + ¹⁰⁹₄₁X + 4 ¹₀n
The nuclide X is Niobium Nb-109.
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Takisha conducted an experiment to determine the effect of salt on the boiling point of water. She measured the boiling points of 100 ml of water with salt added in 5 g increments. As a control, she also recorded the temperature of water with no salt added. What is the purpose of this control?.
The purpose of this control is that it provides a reference value for comparison while doing experiment.
Salt (NaCl) is a Non-volatile means that it does not evaporates readily when heated.
When a non-volatile substance is added to volatile substance. The boiling point of the volatile substance get increased. This phenomena is called elevation in boiling point (colligative property).
She has measured the temperature of the water with no salt added so that she could compare it with the temperature when salt is added in the water.
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when using a water-cooled condenser, the water should choose... the condenser. to make this happen, the water should flow in at the choose... and should flow out at the choose... .
When using a water-cooled condenser, the water should constantly move over the condenser. to make this happen, the water should flow in at the bottom part and should flow out at the top part.
Water cooled condenser is heat exchanger. it will removes heat from the refringent and transfer to the water running through. The advantages of this system is it is lasts year longer. it has higher heat transfer rate
Thus, When using a water-cooled condenser, the water should constantly move over the condenser. to make this happen, the water should flow in at the bottom part and should flow out at the top part.
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PLEASE I NEED HELP, BAD!
Rank the following three transitions in the hydrogen atom in terms of lowest to highest energy, wavelength, and frequency: 8 to3, 6 to 4, 2 to 1
The ranking of the transitions from lowest to highest energy, wavelength, and frequency is;
2 to 1 6 to 48 to 3What is a transition?From the Bohr model of the atom, we know that an electron in the hydrogen atom is able to absorb a photon move from a lower to a higher energy level. This is what we refer to as the excitation of the electron in the atom.
Now we also know that the spectrum of the hydrogen atom can be explained on the basis of the fact that electrons are able to move from a lower to a higher energy level and vice versa, the energy of each of the transition is dependent on the difference between the transition.
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