28 grams of N2 x (1 mol N2/14.0 grams of N2) x (2 mol NH3/1 mol N2) x (17.0 g NH3/ 1 mol NH3) = 68 grams NH3
25 g H2 x (1mol H2/2.0 g H2) x (2 mol NH3/3 mol H2) x (17 grams NH3/2 mol NH3) = 141.7 grams of NH3
So, 68 g NH3 can be produced because N2 is the limiting reactant, and you will run out of it first.
To find how much excess reagent is left, we need to do the reaction backward using the previous answer.
68 g NH3 x (1mol NH3/17.0 g NH3) x (3 mol H2/2 mol NH3) x (2.o g H2/1 mol H2) = 12 g H2
25-12=13 g H2 "
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(1) Draw all significant resonance structures of cycloserine. In step 1 draw the resonance form that forms a carbocation next to the oxygen. Include lone pairs and charges in your structure.
(2) In step 2 draw the resulting resonance structure. Include lone pairs and charges in your structure.
Resonance structures of cycloserine can be produced with the help of rotating arrows, produced with a carbocation in step 1 and the resultant resonance structure in step 2 after the double faced arrow.
An antibiotic called cycloserine was discovered in the bacterium Streptomyces orchidaceous. When treating tuberculosis, it is used with other medications. To depict the motion of the electrons in the "original" resonance structure, use curved arrows. By following the arrows, the "new" resonance structure should be a "product" that is automatically created. It will have two resonance structures as depicted in the image attached. Carbocation produced is the step 1 and the resultant compound is the step 2 in the image.
Resonance structures are collections of Lewis structures that explain how the electrons in a polyatomic ion or molecule become delocalized. Because molecules and polyatomic ions frequently have partial charges and fractional bonds, a single Lewis structure frequently falls short of explaining the bonding in a molecule or polyatomic ion.
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draw the lewis structure for a thiol [SH-] ion
A link between hydrogen and sulfur is created by sharing the one electron that hydrogen possesses. In its association with sulfur, there isn't another atom. In order to complete the octet, the sulfur atom has a .
Why is hydrogen used?Methane, widely known as natural gas, has a healthy substitute in hydrogen. According to estimates, it makes about 75% of the universe's mass and is the most prevalent chemical element. Huge quantities of hydrogen atoms are present on earth in water, plants, animals, and, of course, people.
The location of hydrogen.The sun and the majority of stars include it, while Jupiter is primarily made of it. The most prevalent form of hydrogen on Earth is water. Just under 1 part per million by volume, it only exists as a gas in trace concentrations in the atmosphere.
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suppose your given a Stock solution of 15..110 M nitric acid. what volume of water must you add have ready to add your acid to (in mL) to prepare a solution with a nitric acid molar concentration of 2.895 M and a volume of 602.244 mL?
The volume of water must you add have ready to add your acid to (in mL) to prepare a solution with a nitric acid molar concentration of 2.895 M and a volume of 602.244 mL is 487.02 mL
What is the dilution formula?The dilution formula is used to determine the concentration and volume of reagents in a dilution process of acids, bases, or any other solution.
The dilution formula is:
C₁V₁ = C₂V₂
where;
C₁ is the initial concentration
V₁ is the initial volume
C₂ is the final concentration
V₂ is the final volume
Using the dilution formula:
V₁ = C₂V₂/C₁
V₁ = 602.44 * 2.895 / 15.110
V₁ = 115.42 mL
The volume of water needed = 602.44 - 115.42 mL
The volume of water needed = 487.02 mL
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How many grams of phosphoric acid are formed from 36.4 grams of sulfuric acid?
The amount of phosphoric acid that can be formed from 36.4 grams of sulfuric acid would be 24.50 grams.
Stoichiometric problemPhosphoric acid can be formed from sulfuric acid when the acid is reacted with calcium phosphate according to the following balanced equation:
[tex]Ca_3(PO_4)_2 + 3H_2SO_4 -- > 3CaSO_4 + 2H_3PO_4[/tex]
From the equation of the reaction, the mole ratio of sulfuric acid to phosphoric acid is 3:2.
The equivalent mole of 36.4 grams of sulfuric acid would be:
Mole = mass/molar mass
= 36.4/98
= 0.37 mol
From the mole ratio, the mole of phosphoric acid formed would be:
2/3 x 0.37 = 0.25 mol
Mass of 0.25 mol phosphoric acid = 0.25 x 98 = 24.50 grams
In other words, the amount of phosphoric acid that would be formed from 36.4 grams of sulfuric acid will be 24.50 grams.
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Which two particles are found in the nucleus of an atom?
Answer:
electrically positive protons and electrically neutral neutrons.
Explanation:
Atomic nuclei consist of electrically positive protons and electrically neutral neutrons. These are held together by the strongest known fundamental force, called the strong force. The nucleus makes up much less than . 01% of the volume of the atom, but typically contains more than 99.9% of the mass of the atom.
Answer;
Protons and Neutrons
Explanation;
Well, a nucleus consists of protons and neutrons, soo these are the particles
hence Neutrons and Protons.
ct.
the
2.
16 Calculate For a more difficult training session, the
mass to be pushed is increased to 160 kg. If the
players still push with a force of 150 N, what is the
acceleration of the object?
Use Newton's law:
F = ma
150 N =
HWHO () ……..
The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.
From the formula:
F = ma
a = F/m
a = 150/160
a = 0.9375 m/s²
Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.
How would you define Force?The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.
What is the SI unit of Force?The SI unit of force is the newton, symbolised as N. The base units suitable to force are: metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.
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The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.
How would you define Force?The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.
From the formula:
F = ma
a = F/m
a = 150/160
a = 0.9375 m/s²
Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.
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Help me with this pls
In 1 angle AOD is an obtuse angle and is 110° and angle GOD is an acute angle and it is 70°.
What is an acute angle and an obtuse angle?90 degrees is the standard for a right angle. Any angle that is less than 90 degrees is called acute, and any angle that is larger than the 90 degrees is called obtuse.
How to use a Protractor for acute angle?Follow the instructions below to use a protractor to measure an angle. Align the angle's vertex with the protractor's dot in the center. Set the protractor such that one angle's side is parallel to 0 degrees. Find the point where the angle's opposite side crosses the number scale by reading the protractor.
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Do particles of different masses have the same average speed at a given temperature?
No, particles of different masses do not have the same average speed at a given temperature.
Temperature is a measure of the average kinetic energy of the particles. Since particles of different masses have different amounts of kinetic energy due to their different masses, they will have different average speeds.
This means that particles of different masses do not have the same average speed at a given temperature. The higher the mass of the particle, the lower the average speed at the same temperature.
This is because when the mass of the particle increases, the amount of kinetic energy also increases, resulting in a slower average speed. On the other hand, particles with a lower mass will have a higher average speed at the same temperature because they have less kinetic energy.
This is why particles of different masses do not have the same average speed at a given temperature.
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I need help please anyone?!!
Answer:
# of neutrons
Explanation:
its how isotope is defined
What is the number of nitrogen molecules that reacted with excess hydrogen to make 2x10^10 molecules of ammonia?a. 3 x 10^10b. 1 x 10^10c. 2 x 10^10d. 5 x 10^10
The number of Nitrogen molecules required to make 2 * 10^10 molecules of Ammonia is 3 * 10^10. Hence, the correct option is option A.
We are already aware of the simple molecular reaction between hydrogen, nitrogen which produces ammonia which goes as thus -
= N₂+3H₂ = 2NH₃
This molecular reaction tells us that one mole of nitrogen reacts with three moles of hydrogen in order to create two moles of ammonia.
Here, it is given that we have 2 * 10^10 molecules of Ammonia (NH₃).
We also know the formula = No. of atoms/ Avogadro Number = No. of moles
Hence, we can write that -
= No. of atoms of Nitrogen/ 6.022 * 10^23 = 2(2 * 10^10/6.022 * 10^23)
= No. of atoms of Nitrogen/ 6.022 * 10^23 = 0.6 * 10^-13
= No. of atoms of Nitrogen = 0.6 * 10^-13 * 6.022 * 10^23
= No. of atoms of Nitrogen = 3.6 * 10^10 atoms
This can be rounded off to 3 * 10^10. Hence, option A is the correct option.
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I jus need help w my science stuff☠️
Answer:
Explanation:
Sound energy: Crowd cheering
Chemical energy: Body converts nutrients into energy to run
Mechanical energy: The camera filming the photo
give the product of the bimolecular elimination from each of the isomeric halogenated compounds.
An example of the bimolecular elimination from the isomeric halogenated compound would be of Dehalogenation of 1,2-dibromoethane to form ethene and hydrogen bromide: H3C-CH2-Br2 --> H2C=CH2 + HBr.
Bimolecular elimination is a chemical reaction where two molecules react to form a new molecule and a neutral molecule. Isomeric halogenated compounds are compounds that have the same molecular formula but different structural arrangements.
For example, 1,2-dibromoethane and 1-bromo-2-chloroethane are isomers. Bimolecular elimination of these compounds can produce ethene and hydrogen halide (HBr or HCl) as the products. The specific product will depend on the isomeric halogenated compound and the reaction conditions.
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(part 1 of 2)
Hydrogen and oxygen react under a specific
set of conditions to produce water according
to the equation
2 H2(g) + O2(g) −→ 2 H2O(g).
How much hydrogen would be required to
produce 7.5 mol of water?
Answer in units of mol. Answer in units of
mol.
(part 2 of 2)
How much oxygen would be required?
Answer in units of mol. Answer in units of
mol.
Answer: part 1 of 2
1. The amount required of H₂ = 11.0 g.
2. The amount required of O₂ = 88.0 g.
Explanation:
The balanced equation for the mentioned reaction is:
2H₂(g) + O₂(g) → 2H₂O,
It is clear that 2.0 moles of H₂ react with 1.0 mole of O₂ to produce 2.0 moles of H₂O.
Q1: How much hydrogen would be required to produce 5.5 mol of water?
Using cross multiplication:
2.0 mol of H₂ produce → 2.0 mol of H₂O, from stichiometry.
??? mol of H₂ produce → 5.5 mol of H₂O.
∴ the no. of moles of H₂ needed to produce 5.5 mol of water = (2.0 mol)(5.5 mol)/(2.0 mol) = 5.5 mol.
Now, we can get the mass of H₂ needed to to produce 5.5 mol of water:
mass of H₂ = (no. of moles)(molar mass) = (5.5 mol)(2.0 g/mol) = 11.0 g.
Q2: How much oxygen would be required?
Using cross multiplication:
1.0 mol of O₂ produce → 2.0 mol of H₂O, from stichiometry.
??? mol of O₂ produce → 5.5 mol of H₂O.
∴ the no. of moles of O₂ needed to produce 5.5 mol of water = (1.0 mol)(5.5 mol)/(2.0 mol) = 2.75 mol.
Now, we can get the mass of O₂ needed to to produce 5.5 mol of water:
mass of O₂ = (no. of moles)(molar mass) = (2.75 mol)(32.0 g/mol) = 88.0 g.
The number of objects in a mole of something is dictated by which constant?
The number of objects in one mole of something is determined by Avogadro's constant.
Avogadro is known for his contributions to science related to Avogadro's Law, which is a law that states the relationship between the volume of a gas and the number of molecules.
The results of his research were published in 1811 in the Journal de Physique De Lamétherie, de Chimie et d'Histoire naturelle.
In addition, Avogadro also succeeded in formulating the Molecular Theory, which stated that particles could be composed of molecules, where these molecules could be composed of simpler units or atoms.
For this service, the world of science today knows the name Avogadro's Number or Constant = 6.022 × 10²³
This number or constant is used to express the number of particles in one mole of a substance.
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Jill mixes two types of concentrations of hci (hydrochloric acid): 0. 375 liters of 25% hydrochloric acid, and 0. 625 liters of 65% hydrochloric acid.
Jill combines two different sorts of HCl (hydrochloric acid) concentrations: 0. 375 liters of 25% and 0. 625 liters of 65%. The mixed solution will have an HCl concentration of 1L of 50% HCl.
In this case, we're interested in learning the concentration of HCl as a proportion of the total amount.
First off, the combined volume is 0.375 + 0.625 = 1 L.
The percentage can be calculated as follows:
37.5% of the required 25% is present.
while 62.5% of the 75% are in presence
When we talk about the percentage present, we're talking about the 1 total liter that is there.
Consequently, the final mixture's concentration will be;
(37.5% of 25) + (62.5% of 65)
= 9.375% + 40.625%
50% is obtained by adding both.
Therefore, the concentration is 1L of 50% HCl.
Your question is incomplete but most probably your full question was
Jill mixes two types of concentrations od hci (hydrochloric acid) 0.375 liters of 25% hydrochloric acid and 0.625 liters of 65% hydrochloric acid. what is the hcl concentration in the mixed solution?
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Which statement is correct about the total mass of glucose formed during photosynthesis? (1 point) a It is equal to the total mass of carbon dioxide and oxygen used. b It is equal to the total mass of carbon dioxide and water used. c It is less than the total mass of carbon dioxide and water light used. d It is greater than the total mass of carbon dioxide and water used.
It is equal to the total mass of carbon dioxide and water used" as the substrates (CO2 and H2O) are just merely converted to the products (C6H12O6 and O2) with no mass being consumed or used as fuel for the reaction. In this reaction, energy is well conserved. The correct option is B
What is photosynthesis?Photosynthesis can be defined as the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Therefore the primary function of photosynthesis is to convert solar energy into chemical energy and then store that chemical energy for future use.
The balanced equation of photosynthesis is: 6CO2 + 6H2O + light energy = C6H12O6 + 6O2.
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According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus?
According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus is specific allowed orbits.
What is orbits?Encyclopedic entry. An orbit is a regular, repeating path that one object takes around another object or center of gravity. Orbiting objects, which are called satellites, include planets, moons, asteroids, and manmade devices.An orbit is a regular, repeating path that one object takes around another object or center of gravity. Orbiting objects, which are called satellites, include planets, moons, asteroids, and manmade devices.Objects orbit each other because of gravity. Gravity is the force that exists between any two objects with mass. Every object, from the smallest subatomic particle to the largest star, has mass. The more massive the object, the larger its gravitational pull. Gravitational pull is the amount of force one object exerts on another object.
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What type of heat transfer heats the air in our homes?
Answer:
Conduction: Heat traveling through a solid material. On hot days, heat is conducted into your home through the roof, walls, and windows.
Explanation:
That's a quick answer from gooogle, i hope this helps you :D
Answer:
Heat transfers through solid materials via conduction. The roof, walls, and windows of your house all carry heat on hot days.
Explanation:
step 1 says to always add water to the tube first, then add additional reagents. Why do you suppose this is the case?
What color wavelength does 590 nm represent? Why is this wavelength chosen and how does this wavelength correspond with the color of bromophenol blue? What subatomic particle is responsible for the absorbance at this wavelength?
How should the absorbance of the 1:50 dilution compare with the dilution at 1:100?
What is the extinction coefficient (or molar absorbtivity constant) for the bromophenol blue?
Part 1 is divided into two sections, A and B. Which section address the accuracy of the pipetted volumes? Which section addresses precision of the pipetted volumes? Which statistical quantity would you use to discuss precision? Which statistical quantity would you use to discuss accuracy?
Yellow color represent 590 nm.
What happens in absorption spectra?The atoms in a cold, diluted gas absorb light at particular frequencies, producing an absorption spectrum. Black lines (absence of light) are produced in the spectrum because the re-emitted light is unlikely to travel in the same direction as the absorbed photon.
When switching between two states, an atom, ion, or molecule absorbs photons with energies equal to the difference in the energies of the two states. The outcome is an absorbance spectrum showing the intensity of emission as a function of wavelength.
There are two types of absorption processes: chemical and physical, depending on whether the solute and solvent undergo a chemical reaction.
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caused by the intense heat that comes from the surfaces of streets roofs of buildings. Iker convinces his teacher to do an experiment. V of other students, Iker builds a rooftop garden to cover one half of building. For one semester, Iker records the air temperature on the building with the rooftop garden and the half of the building witho garden. He finds that the average temperature near the rooftop ga The average temperature away from the garden is 29°C.Iker is worried about global warming. He believes that much of the problem is caused by the intense heat that comes from the surfaces of streets and the roofs of buildings. Iker convinces his teacher to do an experiment. With the he of other students, Iker builds a rooftop garden to cover one half of his school building. For one semester, Iker records the air temperature on the half of the building with the rooftop garden and the half of the building without the garden. He finds that the average temperature near the rooftop garden is 23° The average temperature away from the garden is 29°C.
Air Temperature is the manipulated variable for the global warming.
Explain about global warming?
Global warming is the long-term warming of the planet due to human activities, such as burning fossil fuels and deforestation, which release greenhouse gases into the atmosphere. These gases trap heat from the sun, raising the Earth’s average temperature. Global warming is causing sea levels to rise, glaciers and Arctic ice to melt, and more extreme weather events, such as heat waves, droughts, floods, and hurricanes. In addition, global warming is affecting ecosystems and biodiversity, as species struggle to adapt to the changing climate. To address global warming, we must reduce our greenhouse gas emissions and transition to renewable energy sources.
The manipulated variable for the global warming experiment is Air Temperature. This is because Iker is measuring the air temperature on the half of the building with the rooftop garden and the half of the building without the garden in order to compare the difference in air temperature between the two locations.
Therefore, option a Air Temperature is the correct answer.
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I'll give brainliest this is making 0 sense
The following data was collected when a reaction was performed experimentally in the laboratory.
Reaction Data
Reactants Products
Fe2O3 Al Al2O3 Fe
Starting Amount in Reaction 3 moles 5 moles ? ?
Determine the maximum amount of Fe that was produced during the experiment. Explain how you determined this amount.
29130
UO 1601m9
Hower
2. How many grams are in 0.50 mol of copper (II) sulfate?
Transform something quickly: Using the molecular mass finder and the number of moles of CuSO4, 1 mole of Copper(II) sulphate equals 159.6086 gram.
1 mole in grams, how much?
Theoretically, the Carbon-12 atom has this atomic mass As a result, a mole of carbon is exactly equivalent to a gram of carbon, or its atomic mass or weight (12 grams). It is known as a 1 molecular (1M) solution when a substance is dissolved in 1 liter of liquid (1mol/L), a 0.5 molecular (0.5M) solution when it is dissolved in 2 liters of liquid (0.5mol/L), and so on.
What is 1 mole's molarity?
A solution that contains 1 mole of a substance dissolved in a volume of 1 litre is known as a 1 molar solution. For instance: One mole (or one gram) of table salt (NaCl) has a molecular weight of 58.44, making 58.44g the molecular mass of one gram. The number of molecules per liter, denoted by the unit signature mol/L or mol/dm3 for SI units, is the most often used unit denoting molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.
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14. A solution of C₂H4O dissolved in water has a boiling point of 101.6 °C. What is the
molality of the solution? (Kb of water is 0-.512 degrees c/m)
The molality of the solution is 3.125 m.
What is the molality of the solution?Let us recall that the boiling point of the solution is one of the colligative properties and the implication of this is that it depends on the amount of the substance that we can find in the solution.
Note that;
ΔT = K m i
ΔT = Boiling point elevation
K = boiling constant
m = molality
i = Vant Hoff factor
Then;
ΔT = 101.6 - 100.0
= 1.6°C
Thus;
1.6 = 0.512 * m * 1
m = 1.6/0.512
m = 3.125 m
Thus the molality is 3.125 m
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True or False: The particulate matter in emissions such as smoke and soot consist of ____(tiny) particles.
Answer:
true
Explanation:
Particle pollution — also called particulate matter (PM) — is made up of particles (tiny pieces) of solids or liquids that are in the air. These particles may include: Dust; Dirt; Soot; Smoke;
The compound diborane (B2H6) was at one
time considered for use as rocket fuel. Its
combustion reaction is B2H6(g) + 3 O2(ℓ) → 2 HBO2(g) + 2 H2O(ℓ)
The fact that HBO2, a reactive compound,
was produced rather than the relatively inert
B2O3 was a factor in the discontinuation of
the investigation of the diborane as a fuel.
What mass of liquid oxygen (LOX) would be
needed to burn 134.8 g of B2H6?
The mass of liquid oxygen needed to burn 134.8 g of B2H6 is 84.41 mL LOX.
What is liquid oxygen?Liquid oxygen is a form of oxygen in its liquid state. It is a colorless, odorless, and highly reactive substance that is composed of two oxygen atoms bonded together. It can be made by cooling oxygen gas in a cryogenic process to temperatures below -297°F (-183°C).
The combustion reaction of diborane requires 3 moles of oxygen for every 1 mole of diborane, so the mass of oxygen required to burn 134.8 g of B2H6 (1 mole) is:
3 moles of O₂ x (32.00 g/mol O₂) = 96.00 g of O₂
Since liquid oxygen (LOX) has a density of 1.141 g/mL, the mass of liquid oxygen needed to burn 134.8 g of B2H6 is:
96.00 g O₂ ÷ 1.141 g/mL = 84.41 mL LOX
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Be sure to answer all parts. Calculate the formal charge on each second-row atom: :örö-ö: O#1 O#2 O#3 Enter your answers in the provided boxes. Be sure to answer all parts. Assign formal charges to the N and O atom in the given molecule. All lone pairs have been drawn in. -N=0: N: 0: How many covalent bonds are predicted for an atom of N? Enter your answer in the provided box. Select the single best answer. Label the bond in the following compound as ionic or covalent. НІ Covalent Ionic
Covalent bonds are frequently created between the non-metals. These bonds are produced when the atoms are linked electrons. Knowing the number of covalent bonds that exist between any two atoms.
What are three facts about electrons?On the exterior of the nucleus, the negative charge particles termed as electrons spin. They spin so swiftly that it can be hard for scientists to keep up with them. The tiniest particle in an atom are drawn towards the metal cation of the protons; 2000 of them can fit within one proton.
What is an example of an electron?The electron, the smallest constituent part of an atom, has a negatively charged. The quantity of protons and electrons in an atom is equal.
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Below is the structure for the antibiotic mycomycin. How many sp3, sp2, sp hybridized carbons does it have? How many hybridized carbons is there???
The antibiotic mycomycin has seven sp3, sp2, and sp hybridized carbons in its structure. There are a total of seven hybridized carbons in the molecule.
The antibiotic mycomycin is a type of polyketide antibiotic produced by the bacterium Streptomyces mycomyceticus. It is used to treat various infections, including those caused by bacterial parasites, fungi, and protozoa. Mycomycin works by inhibiting the formation of bacterial cell walls, leading to the death of the infected cells. It is effective against a wide range of bacteria, including Gram-positive and Gram-negative bacteria, as well as some fungal species.
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how do you write/ draw a Lewis structure for N?
Lewis dot structure is given in photo .
What is lewis dot structure ?
A Lewis point structure is a type of diagram used to show the distribution of electrons within a molecule or ion. This structure was first introduced in 1916 by chemist Gilbert N. Lewis. The structure consists of dots representing electrons surrounding the chemical symbols of the atoms in the molecule, indicating the number of bonds each atom can form. The dots are placed in pairs around the element symbol and represent the valence electrons (the electrons at the outermost energy level) of that element. The number of valence electrons of an element can be obtained from the periodic table.
Lewis point structures are used to predict the number and type of bonds that form between atoms in a molecule and to predict the shape of the molecule. By connecting the points of different elements in a molecule, the lewis structure can be used to determine the bond order, or the number of bonds between two atoms. Information about bond order, combined with the arrangement of atoms in space, can be used to determine the molecular structure of a molecule.
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I'll give brainliest this is making no sense:( can someone please help me. No fake answer please..
Back in 1920, one of the most sought-after jobs on the East Coast was as a dial painter at a watch factory. These workers were all female, and they absolutely loved their jobs. These girls were instructed to paint the number on a watch with paint laced with an element called radium.
Years later, many of these workers developed many medical problems with their bones. Some girls lost their jaw bones, and others' bones broke when they walked across a room. Several doctors thought that phosphorus poisoned the girls' bones. Their companies insisted that radium was not damaging their bones to avoid a lawsuit.
Answer the questions below to answer the big questions:
• Was it the radium or the phosphorus that poisoned the girls' bones?
• Were the factories responsible for the girls' sicknesses?
1. Calcium from milk and dairy in the diet is stored in bone tissue until humans are in their mid-20s. Calcium moves around the body as an ion. Doctors suspected that another ion - either phosphorus or radium - was deposited instead of calcium in the workers' bones. How could you use the periodic table to figure this out?
2. In 1920, no one knew about ions. Which substance is more likely to act as calcium ions in bones of young shopworkers?
Use the organizer below to identify important patterns in calcium ions compared to radium and phosphorus and determine which element- phosphorus or radium- is more likely to have replaced the calcium ions in the workers' bodies and caused their ailments.
Characteristics of Calcium Ions:
Reasons it could be Phosphorus:
Reasons it couldn't be Phosphorus:
Reasons it could be Radium:
Reasons it couldn't be Radium:
3. Argument: What do you think is the source of the poisoning, Phosphorus or Radium? From a chemistry perspective, are the shop owners responsible for poisoning the workers with radium?
1. Calcium has an atomic number of 20 and phosphorus has an atomic number of 15, while radium has an atomic number of 88. This can be used to determine which element was most likely deposited in the workers' bones in place of calcium.
2. Calcium. This is because calcium is an element with an atomic number of 20, meaning it has 20 protons in its nucleus. It is also found in abundance both in the human body and in many foods, making it easy to obtain and store in the body.
Characteristics of Calcium Ions:
- Has a charge of +2
- Located in column 2 of the periodic table
- Atomic number of 20
Reasons it could be Phosphorus:
- Has a charge of +3
- Located in column 3 of the periodic table
- Atomic number of 15
Reasons it couldn't be Phosphorus:
- Has a higher charge than calcium
- Has a different atomic number than calcium
Reasons it could be Radium:
- Has a charge of +2
- Located in column 7 of the periodic table
- Atomic number of 88
Reasons it couldn't be Radium:
- Has a different atomic number than calcium
- Is located in a far different column than calcium on the periodic table
Conclusion
Based on the evidence, it is likely that the source of the poisoning was radium, and from a chemistry perspective, the shop owners were responsible for exposing the workers to this element and, as such, are responsible for their illnesses.
What is the origin of replication Mcq?
The origin of replication (ORI) is a specific location on a DNA molecule where replication, the process of duplicating the DNA, begins.
The ORI is a unique sequence of nucleotides that serves as a starting point for the replication machinery. The ORI is where the replication enzymes bind, helicases, premises, and polymerases that unwind initiate, and elongate the replication process.
In prokaryotes, the ORI is often a specific sequence known as the replication origin sequence (oriC), which is conserved among different bacterial species. In eukaryotic cells, replication origins are dispersed throughout the chromosomes, and the exact location and mechanism of initiation are still not completely understood.
Learn more about the origin of replication here: https://brainly.com/question/14347138
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