Answer:
P < Bac < LBa
Explanation:
The order of increasing atomic radius is:
P < Bac < LBa
The order of increasing atomic radius for the given elements is:
P < Ba < Cl < B
The atomic radius of an element is defined as half the distance between the nuclei of two identical atoms that are bonded together. As we move down a group in the periodic table, the number of energy levels or shells increases, leading to an increase in the atomic radius. As we move across a period, the atomic radius generally decreases due to the increasing effective nuclear charge, which attracts the electrons more strongly towards the nucleus.
Based on this information, we can order the given elements in increasing atomic radius as follows:
P (Phosphorus) has 15 electrons and is in the third period of the periodic table. It has a smaller atomic radius than the other two elements because it is located to the right of Ba and L in the same period. The trend of decreasing atomic radius as we move across a period is observed here.
Ba (Barium) has 56 electrons and is in the sixth period of the periodic table. It has a larger atomic radius than P because it is located below P in the same group. The trend of increasing atomic radius as we move down a group is observed here.
L (Lanthanum) has 57 electrons and is also in the sixth period of the periodic table. It has the largest atomic radius of the three because it is located below Ba in the same group. Similar to Ba, the trend of increasing atomic radius as we move down a group is observed here.
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The image above shows divergent plate boundaries.
A. True
B. False
Please help Chemistry
What is the percent yield of Fe2S3
if 284 g Fe2S3 are collected, rather
than the 863 g Fe2S3 expected
through calculation?
2FeBr3 +3Na₂S → Fe2S3 + 6NaBr
[ ? ]%
The percent yield of [tex]Fe_2S_3[/tex], according to the given parameters, would be 32.91%.
Percent yieldThe percent yield of a particular product from a reaction is the actual amount of that product formed relative to the stoichiometric or theoretical amount that is supposed to be formed.
The percent yield of a reaction can be mathematically expressed as:
Percent yield = actual yield/theoretical yield x 100%
In this case:
Actual yield = 284 g
Theoretical yield = 863 g
Percent yield = 284/863 x 100
= 32.91%
In other words, the percent yield of [tex]Fe_2S_3[/tex] according to the given parameters would be 32.91%.
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Answer:
first answer is correct in accellus
Explanation:
what do biological systems do with matter
Answer:
In biological systems, matter is continuously changing states through chemical processes. For example, carbon in the form of the gas carbon dioxide is changed into glucose, a solid. This change, of course, occurs during photosynthesis.
What is the mass of 3.20 x 1023 formula finite iron(III) oxide
How many moles of carbon are needed to produce 562 grams of carbon dioxide?
The amount, in moles, of carbon that are needed to produce 562 grams of carbon dioxide would be 12.77 mols.
Stoichiometric problemCarbon dioxide can be produced from the reaction of carbon and oxygen according to the following equation:
[tex]C + O_2 --- > CO_2[/tex]
From the reaction, the mole ratio of carbon to carbon dioxide is 1;1.
Recall that: mole = mass/molar mass
Thus, the mole equivalent of 562 grams of carbon dioxide would be:
562/44 = 12.77 mol
This amount of carbon dioxide will also be the amount of carbon that will be required to react since the mole ratio is 1 to 1.
In other words, from the established stoichiometric mole ratio, the number of moles of carbon needed to produce 562 grams of carbon dioxide would be 12.77 mol.
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Calculate the number of molecules present in 0.45 moles of H2O2.
Answer: 2.7099 × 10²² molecules
Explanation:
1 mole of H₂O₂ = 6.022 × 10²² molecules of H₂O₂
No . of molecules in 0.45 moles of H₂O₂ = 0.45 × 6.022 × 10²²
= 45/ 100 × 6.022 × 10²²
= 270.99 /100 × 10²²
= 2.7099 × 10²² molecules
∴ The no. of molecules present in 0.45 moles of H₂O₂ are 2.7099 × 10²² molecules .
Predict the products of the following reactants: Cu + AlCl3 -->
A. 3Cu + 2AlCl3 --> 3CuCl2 + 2Al
B. Cu + AlCl3 --> CO2 + H2O
C. Cu + AlCl3 --> AlCuCl3
D. No reaction will occur
The products of the reactants: 3 Cu +2 AlCl₃ → 3CuCl₂ + 2Al.
What is the chemical equation?A chemical equation involves reactants, formed products, and an arrow indicating the direction of the reaction.
The chemical equation in which the number of atoms of every involved element is equal on both sides of the equation is known as a balanced chemical equation.
The law of conservation of mass needed to be followed by a chemical equation. The total mass of the elements on the reactant side will be equal to the total mass of elements on the product side in any balanced chemical equation.
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What cells are responsible for absorption in small intestine?
The cells responsible for absorption in the small intestine are epithelial cells.
The small intestine is part of the digestive tract which consists of villi, circular muscles, longitudinal muscles, mucous lining, and epithelium. In the small intestine, a chemical digestion process occurs in which enzymes break down complex organic matter molecules into simpler molecules.
Epithelial cells are cells that line the surface of the small intestine in a cylindrical and cube-shaped intestine. On its surface there are villi that expand the surface of the intestine. Epithelial cells function to absorb simple molecules that have been digested chemically through enzymes secreted by the mucous glands, In addition, epithelial cells also play a role in protecting the intestine from microbial infections.
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How is our modern understanding of atomic structure different from thomson’s plum pudding model?
So the plum pudding model is different from the hard-sphere model of the atom because in the hard sphere model of the atom, the atom is the smallest division of matter.
What is atom?Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.Investigate varying electron configurations in electron shells around an atom's nucleus.Investigate varying electron configurations in electron shells around an atom's nucleus See all videos for this articleMost of the atom is empty space. The rest consists of a positively charged nucleus of protons and neutrons surrounded by a cloud of negatively charged electrons. The nucleus is small and dense compared with the electrons, which are the lightest charged particles in nature. Electrons are attracted to any positive charge by their electric force; in an atom, electric forces bind the electrons to the nucleus.To learn more about electron refer to:
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Equipment not kept in your assigned lab drawer is called:
Shared equipment
Departmental equipment
Lab equipment
Community equipment
Equipment not kept in your assigned lab drawer is called: Shared equipment
Departmental equipment are the set of things that is to be used by all the people of department and not necessarily have to be a research equipment. This kind of equipment mostly include some simple machineries and all purpose equipment that can also be used out of the laboratory.
Lab equipment are strictly research related things but can be used for various projects and not strictly used for a particular project. This kind of equipment can be used by research scholars as well as undergraduate or postgraduate student group.
Community equipment are also research related thing but unlike Lab equipment it is used by a group of students or research scholars who are involved in same project or similar kind of project and can't be shared commonly among all the students.
A shared equipment is research related thing but unlike Community equipment it is not shared among the scholars of similar kind of different projects. Shared equipment is assigned for a single group for a particular project and can be shared among the group members only. No members of the group can acquire it all alone.
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how do i balance this equation? Na + H₂O → NaOH + H₁₂
The balanced equation is 2Na + 2H2O → NaOH + H2
What is the balanced sodium-water equation?2Na+2H2O2NaOH+H2 is the balanced chemical equation.
A neutralization reaction is a chemical reaction in which an acid and a base combine quantitatively to generate a salt and water as products. A neutralization reaction involves the formation of water by the interaction of H+ ions and OH- ions.
To meet the rule of conservation of matter, which stipulates that matter cannot be generated or destroyed in a closed system, chemical equations must be balanced. A chemical equation’s balance is governed by the rule of conservation of mass. Water is formed when positive hydrogen ions from HCl and negative hydroxide ions from NaOH mix.
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I wasn't here to learn this can someone help me
A debate among scientists on how new species form is based on speciation.
Divergence explains how organisms on Earth are related because it shows how species are similar or different.
Genes play the role in diversity of carrying information that results in changes from one generation to the next.
Natural selection is part of evolution because it explains why attributes are either in existence or have gone extinct.
What do scientists debate about how species are formed ?One of the main debates among scientists on how new species form centers around the concept of speciation. There are two main hypotheses for speciation: allopatric speciation and sympatric speciation.
Divergence is the process by which different populations or species of organisms evolve from a common ancestor over time. This process is responsible for the diversity of life on Earth. By studying the similarities and differences between different organisms, scientists can infer evolutionary relationships.
Genes are the basic units of inheritance that carry information from one generation to the next. They play a crucial role in creating diversity among organisms. The genetic diversity of a population is the result of mutations, gene flow, and genetic drift.
The theory of natural selection is one of the most important and widely accepted explanations for the diversity of life on Earth. It is the process by which certain traits become more or less common in a population over time, depending on their impact on the survival and reproduction of the organisms that possess them.
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If a jug hold 5 gallon of water. If a gla hold 4 oz of water, how many glae can be drawn from the water jug
The water in the 5-gallon jug will fill 160 glasses.
According to the issue, a glass carries 4 ounces of water while a jug holds 5 gallons. We must convert the jug's volume from gallons to ounces and divide it by the volume of glass in order to determine how many glasses can be filled from it.
The water in the jug needs to be converted from gallons to ounces first. A gallon contains 128 ounces, hence 5 gallons of water equal 5×128 = 640 ounces.
The amount of water in the glass is then divided by the amount of water in the jug. If a glass holds four ounces, then 160 glasses can be filled from the jug, or 640 divided by four.
It's vital to note that we are converting between units in this problem using the rule that 1 gallon = 128 ounces. This conversion factor is based on the units of a gallon and an ounce, which are both common measurements.
We can simply convert gallons to ounces using this conversion factor, which enables us to perform the calculations required to get the solution.
In conclusion, by dividing the volume of the 5-gallon jug of water by the volume of glass, 160 glasses can be filled from it. To accomplish this, we must use a conversion factor to convert water measured in gallons to ounces.
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Use the following Ionic Compounds to write Disassociation Equations:
1.) Ca^+2 and NO3^-1
2.) Fe^+2 and SO4^-2
3.) Al^+3 and PO4^-3
4.) Pb^+2 and CrO4^-2
4.) Pb^+2 and CrO4^-2
When Pb^+2 and CrO4^-2 ions are dissolved in water, they will dissociate into their individual ions. The equation for this is:
PbCrO4 --> Pb^+2 + CrO4^-2
It's worth noting that these equations are showing the dissociation of the ionic compounds in aqueous solution. The degree of dissociation depends on the nature of the compound and the conditions of the solution, and it may not be 100%.
Among the different types of scientific knowledge,
are likely to be modified or discarded most frequently. Long ago, in the 1600s, scientists discarded the phlogiston theory because
Many people in the early days of science thought that combustible stuff was made of a component called phlogiston that this substance was emitted during the burning of combustible things.
A combustible material is what?
Combustible materials are those that, when exposed to fire or heat, will ignite, burn, sustain combustion, or produce flammable gases in the form and circumstances anticipated for their application. Combustible materials include rubber, plastics, rubberized materials, and wood.
What gases are combustible?
A gas that really can ignite inside the air or with oxygen is said to be combustible. Gases like hydrogen, methane, propane, and iso-butane are examples of flammable gases. In the existence of an ignition source, a mixture containing a particular amount of flammable oxygen and gas will explode. The most common reason for gas explosion accidents is combustible gas.
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Decribe the different term: lattice enthalpy and hydration enthalpy. Which proce in quetion 2 i exothermic? Which proce i endothermic? Explain your reaoning
Lattice enthalpy and hydration enthalpy both are always exothermic.
Lattice enthalpy is exothermic it involves the association of positively charged and negatively charged species. These species have an electrostatic forces of attraction to each other and can therefore released a lot of energy when bond is formed. [tex]Na^{+}[/tex] + [tex]Cl^{-}[/tex] → [tex]Na^{+}[/tex][tex]Cl^{-}[/tex]
Hydration enthalpy also exothermic in nature as water molecules surround the ions to form new forces of attraction. It depends upon ionic charge- greater the ionic charge stronger will be the ion-dipole interactions which is formed between the ions in the ionic lattice as well as water molecules.
[tex]M^{+}[/tex](g) + aq → [tex]M^{+}[/tex][tex]_{(aq)}[/tex]
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A value of 25 °C is a measurement of
O distance.
O density.
O mass.
O volume.
O temperature
Calculate the molar concentration of 8 g of odium ulfate, Na2SO4(), diolved in 210 mL of olution
The molar concentration of of 8 gram of sodium sulfate(Na₂SO₄) dissolved in 210 ml of solution is 0.267.
Molar concentration is defined as the number of moles of a substance in 1 liter of solution. If molar concentration is denoted by M, number of mole denoted by "n" and volume of solution is denoted by V, then
M = n/V
Atomic weight of sodium sulfate(Na₂SO₄) = (23×2+32+16×4) = 142
142 gram is the weight of 1 mole of sodium sulfate(Na₂SO₄).
1 gram is the weight of 1/142 moles of Na₂SO₄
8 grams is the weight of (1×8)/142 = 0.056 moles
Volume of solution = 210 ml = 0.210 liter
So, the molar concentration, M = 0.056/0.210
M = 0.267
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a spray paint contain flammable gas
help 30 points i need it now
Answer: ignitable gases, such as propane and butane.
Explanation:
That propellant may have hazardous characteristics such as being flammable (spray paint and lubricating sprays) and/or toxic (e.g. chlorinated solvent sprays or cleaning products). Most propellants in spray cans are mixtures of ignitable gases, such as propane and butane.
What is happening to the light when you see a green object?
A: The green light is absorbed
B: The green light is reflected .
C: The green light goes through the object.
Answer:
A. The green light is absorbed
How to work out rate of reaction
The forested mountains of upstate New York are filled with sugar maples, oaks, and yellow birch trees. They are also home to predators like bobcats. These animals live alone and wander over large areas to search for food and to breed with other bobcats. Recently, a dairy farmer who lives in the area and who supplies large amounts of milk to stores decided to build a fence around his farm in order to prevent his grazing cows from wandering off. The farmer is happy with these changes because it allows him to increase his milk production.
Will these changes around the farm affect the bobcat population? (Yes or No) (EXPLAIN) your answer.
Answer: His decision to add a fence to prevent his cows from straying will result in a long-term decline in the bobcat population. Most likely, the cows are being preyed upon by the bobcats when they stray and are fed in return. Because the cows are unable to cross a particular limit when the farmer constructs a fence, bobcats have less opportunity to hunt the cows.
Explanation:
draw the electron configuration for a neutral atom of iron.
The electron configuration for a neutral atom of iron (Fe) is [Ar] 3d^6 4s^2
The electron configuration is a way of describing the arrangement of electrons in an atom. It is written by listing the various electron shells and the number of electrons in each shell. In the case of iron, it has 26 electrons, which are arranged in the following way:
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6
The first two electrons go in the 1s orbital. The next two electrons go in the 2s orbital, and then six electrons go in the 2p orbitals. The next two electrons go in the 3s orbital, six electrons go in the 3p orbitals, and the last two electrons go in the 4s orbital. The last 6 electrons go in the 3d orbitals. The electron configuration shows that the last six electrons in the 3d orbitals are the valence electrons which are responsible for chemical reactions.
The element Iron (Fe) belongs to the group 8 of the periodic table, the elements of this group are known as transition elements, which have an incomplete d-subshell.
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How do you think the atoms in metal elements are different from those in nonmetals or metalloids?
Explanation:
Metaloids and nonmetals are more likely to have the properties of liquids and gases.Though they can be elements and compounds like metals, it is less likely for you to see metaloids and nonmetals in a solid state like metals.
Hope this helps !
Why are plants so important to humans and other animals?
Answer:
Plants are a resource of food and are also responsible for turning CO2 into O2
Explanation:
10. A chemist wants to make calcium phosphate using the following reaction:
2K3PO4 (aq) + 3CaCl₂ (aq) → Cas(PO4)2 (s) + 6KCl (aq)
culu
If he has extra calcium chloride and 750.0 mL of a 1.8 M solution of potassium
phosphate, how many grams of calcium phosphate can he produce?
Answer:
So the chemist can produce 418.7 grams of calcium phosphate.
Explanation:
We can start the problem by using the balanced chemical equation for the reaction and the stoichiometry to determine the amount of calcium phosphate that can be produced.
2K3PO4 (aq) + 3CaCl2 (aq) → Ca3(PO4)2 (s) + 6KCl (aq)
From the balanced equation, we can see that for every 2 moles of potassium phosphate (K3PO4) reacted, 1 mole of calcium phosphate (Ca3(PO4)2) is produced.
We are given that the chemist has 750.0 mL of a 1.8 M solution of potassium phosphate. We can convert this information into moles by using the formula:
moles = concentration x volume
moles = 1.8 M x (750.0 mL) / 1000 mL/L = 1.35 moles
To find the number of grams of calcium phosphate that can be produced we can use the molar mass of calcium phosphate which is 310.18 g/mol
grams = moles x molar mass
grams = 1.35 x 310.18 = 418.7 grams
So the chemist can produce 418.7 grams of calcium phosphate.
How many grams of sodium nitrate will be produced from 15.1 moles of silver nitrate?
1284.689 grams of sodium nitrate will be produced from 15.1 moles of silver nitrate.
How to determine grams of sodium nitrate?To determine how many grams of sodium nitrate will be produced from 15.1 moles of silver nitrate, we need to perform a balanced equation and stoichiometry calculation.
The balanced equation for the reaction between silver nitrate and sodium chloride to form silver chloride and sodium nitrate is:
AgNO3 (aq) + NaCl (s) → AgCl (s) + NaNO3 (aq)
We know that 15.1 moles of silver nitrate will react with the stoichiometric amount of sodium chloride, which is 1 mole of sodium chloride for every 1 mole of silver nitrate.
So, we can calculate the moles of sodium nitrate that will be produced by multiplying the moles of silver nitrate by the coefficient of sodium nitrate in the balanced equation:
15.1 moles AgNO3 * 1 mole NaNO3 / 1 mole AgNO3 = 15.1 moles NaNO3
To convert the moles of sodium nitrate to grams, we can use the molar mass of sodium nitrate, which is 84.99 g/mol.
15.1 moles NaNO3 * 84.99 g/mol = 1284.689 g
So, 1284.689 grams of sodium nitrate will be produced from 15.1 moles of silver nitrate.
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What is the mass of 3.25 moles S8?
Answer:
3.25 Moles of Sulfur 8= 833.69 Grams
Explanation: I assumed you meant sulfur
How could you find the number of particles in 4 moles of a substance ?
Answer:
below
Explanation:
Calculating the number of particles
1. The number of particles in a substance can be calculated using:
2. Number of particles = Avogadro constant × the amount of substance in mol.
3. Calculate the number of water molecules in 0.5 mol of water.
4. Number of water molecules = Avogadro constant x amount of substance in mol.
Arrange the oxoacids of bromine according to strength.
Strongest acid
Weakest acid
Answer :
a. HBrO2
b. HBrO
c. HBrO3
d. HBrO4
Oxoacids get more acidic as the number of oxidations on the halogen rises.
Perchloric acid is the most potent acid there is. As NH 4Br is an acidic salt, the solution will be acidic even though the Br ions come from a strong acid (HBr), but the NH 4 + ions come from a weak base (NH 3). Br2 is therefore regarded as a mild Lewis acid. Large acceptor atoms in soft acids have a low positive charge, are highly polarisable, and have poor electronegativity. One of the finest nucleophiles, the bromide ion is a poor base. It chooses to take on a nucleophilic role.
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