The atomic mass is defined as the mass an atom of an element. The atomic mass in approximation is equal to the sum of number of neutrons and protons in the nucleus of an atom (mass number). The units which are used for measuring the atomic mass is atomic mass unit, [tex]u[/tex].
Thus, the correct option is option E that is atomic mass unit is used for measuring atomic mass.
Answer:
Explanation:
unit isnt e its d
A sample of propane, C3H8, contains 15.5 moles of carbon atoms. How many total moles of atoms does the sample contain?
Express the total number of moles of carbon and hydrogen numerically.
Answer:
H = 41.3 mol H; Atoms = 56.8 mol
Explanation:
A molecule of propane contains eight atoms of H for every 3 atoms of C or 8 mol H atoms for every 3 mol C atoms.
∴ [tex]\text{Moles of H atoms} = \text{15.5 mol C atoms} \times \frac{\text{8 mol H atoms }}{\text{3 mol C atoms }} = \text{41.3 mol H atoms}[/tex]
Total atoms = 15.5 mol C atoms + 41.3 mol H atoms = 56.8 mol atoms
Given 15.5 moles of carbon atoms in a sample of propane (C3H8), there are a total of 56.87 moles of atoms (carbon and hydrogen combined). This is calculated by dividing the given carbon moles by the count of carbon atoms in a propane molecule, then multiplying the result with the total count of atoms in one molecule of propane.
Explanation:The question pertains to the calculation of total moles of atoms in propane (C3H8), given the moles of carbon atoms as 15.5. Propane is a hydrocarbon which contains 3 moles of carbon atoms and 8 moles of hydrogen atoms per molecule. Therefore, for every 1 mole of propane, there are 3 moles of carbon and 8 moles of hydrogen, totaling 11 moles of atoms.
If 15.5 moles of carbon atoms are present, this means that there are 15.5/3 = 5.17 moles of propane. Therefore, the total moles of atoms in your propane sample would be 5.17 moles propane x 11 moles atoms/mole propane = 56.87 moles of atoms. This figure consists of the number of moles of carbon and hydrogen atoms combined in the propane sample.
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Which of the following is true about carbon dioxide?
a.) Carbon and oxygen are chemically bonded in it.
b.) Carbon and oxygen retain their original identity in it.
c.)It can be separated into carbon and oxygen using physical methods.
d.)The proportion of carbon and oxygen is different in different samples of the gas.
a) Carbon and oxygen are chemically bonded in carbon dioxide.
The elements lose their individual identities in CO₂, and they always combine o the proportion C:O = 1:2.
You cannot separate the elements from each other by physical means.
Final answer:
Carbon dioxide is composed of carbon and oxygen chemically bonded by two double covalent bonds, forming a new substance that cannot be separated by physical methods and displays a constant proportion of carbon to oxygen across all samples.
Explanation:
Among the statements provided about carbon dioxide, the correct one is that carbon and oxygen are chemically bonded in it. Carbon dioxide is a chemical compound made up of one carbon atom and two oxygen atoms, and these are joined by two double covalent bonds, represented by the chemical formula O=C=O. This structure means that the carbon and oxygen atoms do not retain their original identity within the compound; they form a completely new substance with different properties. Moreover, this compound cannot be separated into its constituent elements using physical methods; chemical reactions would be required to break these bonds. Additionally, in a large sample of carbon dioxide, the proportion of carbon to oxygen remains constant because molecular compounds consist of identical molecules.
Aerosol cans contain a written warning not to subject the can to high temperatures or incinerate. Suppose an aerosol can is heated from 22°C to 110°C. What would you expect to happen? A) The contents of the aerosol can to vaporize. B) No change in volume or pressure; only an increase in temperature. C) The volume of the gas to decreases proportionately to the increase in temperature. D) The pressure in the can to increase proportionately to the increase in temperature.
A suspension of the liquid droplets or the solid particle under pressure is called aerosol. When the temperature is increased then, pressure will increase proportionally.
What is the ideal gas law?The aerosols are colloidal substances under pressure that gets released as fine particles of spray in the air. They also follow the law of the ideal gas equation.
According to the law, the factors pressure and volume are directly proportional to the number of the moles, and the temperature of the ideal gas of the system.
When the temperature of the aerosol can is heated and raised from 22 to 110 then the pressure of the can will increase in proportion to the temperature as, [tex]\rm P \alpha T[/tex].
Therefore, option D. pressure increases proportionately to the temperature.
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Most of the mass of an atom is made up of: the electrons and protons the protons and neutrons the neutrons and electrons none of the above
Most of the mass is made of the protons and neutrons.
Answer:
Protons and neutrons
Explanation:
This is a simple answer, but I assure you it is 100% correct and verified.
Hope this helps.
Is putting popsicle molds in the fridge a physical or a chemical change?
Explain why?
When you put a popsicle mold in the fridge, the mold is in a liquid state. Therefore, when it is frozen it turns into a solid state. When you are trying to figure out these types of scenarios you can always ask this question. Can the object go back to its original form? For example, if you burn wood you can't bring it back to the way it was before you burned it. Therefore, since you can't bring it back, it is a chemical change. In this case however, you CAN bring it back. If you freeze the popsicle mold, it will be made of the same stuff, just in a different state of matter. If you put the popsicle outside and keep it in the mold, then it will turn back into the liquid state. Since in this case, you can change it back and forth, it is a physical change.
Placing popsicle molds in the fridge is classified as a physical change because it alters the state of the substance (from liquid to solid) without changing the substance's identity.
Putting popsicle molds in the fridge is an example of a physical change rather than a chemical change. Physical changes are temporary and reversible, involving alterations to states of matter without changing the substance’s identity. Freezing a liquid into a solid does not alter the nature or identity of that substance, in this case, the popsicle mix. However, a chemical change would involve the composition of the substance being altered, which doesn't occur when popsicle molds are put in the fridge to freeze. So, we conclude that when popsicle molds are placed in the fridge, it causes a physical change, not a chemical change.
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How does the ability to conduct heat differ between metals and nonmetals?
Poor electrical conductors like glass, plastic, wood, etc. conduct heat mainly through vibrations among the molecules. As molecules vibrate, they bump into their neighbors from time to time, transferring some of their energy (i.e. heat). Those neighbors then bump in to some of their neighbors on the other side and transfer some of the energy to them. The process continues, and the heat is transferred through the material, but it happens quite slowly because the molecules are mostly stuck in place (because they're part of a solid material. If they were liquid or gas, they could move around more freely and transport heat more quickly. That process is called convection, rather than conduction). Anyway, metals and other good electrical conductors have the ability to transfer energy through an additional mechanism. In this case, the vibrating molecules literally shake off some of their weakly-bound electrons (which are plentiful in metals and all other good electrical conductors). These high-energy electrons then fly away and bump into other molecules or electrons, transferring the heat. Unlike entire vibrating molecules, however, individual electrons are so small that they can travel much longer distances at much, much higher speeds before they bump into anything. (It's sort of like shooting a gun in a forest. The bullet may travel several hundred feet or more before it actually strikes a tree. If you tried to drive a bus in that same forest, however, you couldn't go more than a few feet without running into something) Hope this helps :)
Metals are good conductors of both electricity and heat due to the presence of free electrons that facilitate energy transfer, resulting in high thermal conductivity. Nonmetals are generally poor heat conductors and are considered insulators because they lack these free electrons, which causes them to transfer heat much slower.
The ability to conduct heat distinguishes metals from nonmetals. Metals like copper, aluminum, and silver are good conductors of electricity and, correspondingly, are also good thermal conductors. The thermal conductivity of metals can largely be attributed to the presence of free electrons that facilitate the transfer of energy as heat.
Nonmetals, on the other hand, typically have a lower thermal conductivity and are considered insulators. Materials such as wood, plastic, and rubber have a limited ability to conduct heat, causing them to be inefficient at transferring thermal energy compared to metals.
The difference is so notable that touching a metal object and a nonmetal object at the same temperature often results in the metal feeling colder due to its rapid heat conduction away from the hand. This property of metals is because they allow energy to flow more quickly throughout the material, whereas nonmetals like paper and Styrofoam conduct energy so slowly that they appear to maintain warmth for longer periods.
how are the structure and properties of solids related
The general properties of solids reflect the orderly arrangement of their particles and the fixed locations of their particles.
Final answer:
The structure of solids, whether crystalline, amorphous, or metallic, dictates their properties such as melting points, hardness, thermal conductivity, electrical conductivity, malleability, ductility, elasticity, and strength.
Explanation:
The structure of solids is intimately linked to their properties. The arrangement of atoms, ions, or molecules in a solid determines how the solid will interact with its environment. For instance, a solid with a crystalline structure, where the particles are arranged in a highly ordered pattern, typically has distinct melting and boiling points.
Materials like diamond, with a rigid lattice structure, have high hardness and high thermal conductivity because of the strong covalent bonds holding the carbon atoms in place. In contrast, amorphous solids like glass lack a long-range order, resulting in different physical properties, such as varying melting points and lower thermal conductivity.
In metals, the structure is characterized by a metallic bonding where electrons are delocalized, allowing them to conduct electricity and heat efficiently. Additionally, the arrangement of atoms within metals allows them to deform under stress without breaking, giving them malleability and ductility.
Moreover, polymers have structures that range from crystalline to amorphous, determining their elasticity, strength, and plasticity. For example, the highly ordered structure of Kevlar makes it incredibly strong, while the less ordered structure of rubber makes it flexible and stretchy.
Thus, understanding the relationship between structure and properties is essential in material science for predicting and explaining the behavior of different materials.
Consider the following data showing the initial rate of a reaction (A→products) at several different concentrations of A. [A](M) Initial rate (M/s) 0.15 0.014 0.30 0.113 0.60 0.905. What is the order of the reaction? Express your answer as an integer.
Given:
A → Products
[A] M Rate(M/s)
1. 0.15 0.014
2. 0.30 0.113
3. 0.60 0.905
To determine:
Order of the reaction
Explanation:
The rate of the given reaction can be expressed as:
Rate = k [A]ⁿ-----(1)
where k = rate constant
[A] = concentration of A
n = reaction order
Based on equation (1) the Rates 1 and 2 can be expressed as:
0.014 = k[0.15]ⁿ ------(3)
0.113 = k[0.30]ⁿ-------(4)
Dividing eq (4) by (3) we get:
0.113/0.014 = [0.30/0.15]ⁿ
8 = 2ⁿ
i.e. 2³ = 2ⁿ
n = 3
Ans: Thus, the order of the reaction is 3
The order of the given reaction is [tex]\boxed{3}[/tex] .
Further Explanation:
Order of reaction:
This indicates dependence of rate on power of concentration of reactants involved in the chemical reaction. On the basis of order of reaction, reaction can be first-order, second-order and so on.
Given reaction is as follows :
[tex]A\rightarrow\text{Products}[/tex]
Consider n to be the order of this reaction. So rate of reaction for the given reaction is expressed as follows:
[tex]\text{Rate}=k\left[A\right]^n[/tex] ...... (1)
Here,
k is the rate constant for the reaction.
[A] is the concentration of A.
n is the order of reaction.
When concentration of A is 0.15 M, rate of reaction is 0.014 M/s.
Substitute 0.15 M for [A] and 0.014 M/s for rate in equation (1).
[tex]\text{0.014\text{M}}=k\left[0.15\right]^n[/tex] ...... (2)
When concentration of A is 0.30 M, rate of reaction is 0.113 M/s.
Substitute 0.30 M for [A] and 0.113 M/s for rate in equation (1).
[tex]\text{0.113\text{M}}=k\left[0.30\right]^n[/tex] ...... (3)
Dividing equation (3) by equation (2),
[tex]\begin{aligned}\dfrac{\text{0.113\text{M}}}{\text{0.014\text{M}}}=&\dfrac{k\left[0.30\right]^n}{k\left[0.15\right]^n}\\\left(2\right)^3=&\left(2\right)^n\end{aligned}[/tex]
Solving for n,
[tex]n=3[/tex]
Therefore order of reaction becomes 3.
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Answer Details:
Grade: Senior School
Subject: Chemistry
Chapter: Chemical Kinetics
Keywords: order, rate, k, A, products, 3, n, rate constant, order of reaction, 0.15 M, 0.30 M, 0.113 M/s, 0.014 M/s.
How much chalcopyrite had to be mined to produce 100 pennies if reaction 1 had a percent yield of 63.00 % and all other reaction steps had yield of 100%?
1) Balanced chemical reaction 1:
2CuFeS₂ + 3O₂ → 2CuS + 2FeO + 2SO₂.
Balanced chemical reaction 2: 2FeO + SiO₂ → 2FeSiO₃.
Balanced chemical reaction 3: 2CuS → Cu₂S + S.
Balanced chemical reaction 4: Cu₂S + S + O₂ → 2Cu + 2SO₂.
m(Cu) = 3.0 g; mass of copper in one penny.
n(Cu) = m(Cu) ÷ M(Cu).
n(Cu) = 3 g ÷ 63.55 g/mol.
n(Cu) = 0.047 mol; amount of copper in one penny.
2) From balanced chemical reactions: n(Cu) : n(CuFeS₂) = 1 : 1.
n(CuFeS₂) = 0.047 mol.
ω(CuFeS₂) = 63.00% ÷ 100%.
ω(CuFeS₂) = 0.630; a percent yield of chemical reaction 1.
m(CuFeS₂) = 0.047 mol · 183.54 g/mol ÷ 0.630.
m(CuFeS₂) = 13.692 g; mass of chalcopyrite for one penny.
m(CuFeS₂) = 13.6927 g · 100.
m(CuFeS₂) = 1369.27 g; mass of chalcopyrite for 100 pennies.
The percent yield of a reaction indicates the percentage of the theoretical maximum product that is actually obtained. Due to a 63% yield in the first reaction stage, more chalcopyrite than the actual weight of 100 pennies needs to be mined. This original amount of chalcopyrite can be found by reverse calculating the theoretical yield that leads to 250g as the actual yield.
Explanation:To answer this question, we need to first understand the concept of percent yield. This is a measure of how much of a product is obtained in a chemical reaction relative to the theoretical maximum amount that could be produced. It is calculated using the formula:
Percent Yield= (actual yield/theoretical yield) x 100%
In the given question, the percent yield of the reaction involving chalcopyrite is 63.00%. Post that, all other reaction steps had a yield of 100%, implying no loss in those stages. Therefore, to produce 100 pennies, we would need to mine more chalcopyrite than the actual weight of 100 pennies, to account for the loss in the first stage of the reaction.
Assuming a penny weighs about 2.5 g and is composed primarily of copper, 100 pennies would weigh approximately 250 g. To calculate how much chalcopyrite needed to be mined considering the percent yield, we would reverse calculate the theoretical yield that gives us 250g as actual yield at 63%. That would indicate the original amount of chalcopyrite needed to be mined.
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which set of numbers gives the correct possible values of l for n = 2
Answer:
The possible values are l={0,1}
Explanation:
Hi,the possible values that the Azimuthal number (l) are given by the value of the Principal quantum number (n) of the atomic level you are in:
[tex] l=[0;n-1][/tex]
In this case:
For [tex]n=2 \longrightarrow n-1=2-1=1[/tex] so l values will be 0 and 1
This different values the Azimuthal numbar can have, determine the different types of sublevels that atomic level has.
For example:
l=0 is sublevel sl=1 is sublevel pl=2 is sublevel dWhat does the existence of coal beds in Antarctic mean
The existence of coal beds in antarctic means the presence of trees and plants 35 million and 55 million years ago.
Explanation:Coal forms in swamps as plants dieThey are buried before they can be completely decomposed.It means there were plants that buried in antarctic for long period of time.the ratio of the mass of a substance to its volume is called
I believe it is called, Density.
Answer : The ratio of the mass of a substance to its volume is called density.
Explanation :
Density : It is defined as the mass of a substance contained per unit volume.
The unit of mass is gram (g) and the unit of volume is milliliter (ml). So, the unit of density is g/ml.
Formula used :
[tex]Density=\frac{Mass}{Volume}[/tex]
For example : If mass of object is 550 grams and volume of water displaced 25 ml. Calculate the density of an object.
By using formula, we get:
[tex]Density=\frac{550g}{25ml}=22g/ml[/tex]
Thus, density of the object will be 22 g/ml
Super fine 40-gauge copper wire has a diameter of only 0.080mm and weighs only 44.5/gkm . Suppose a spool of 40-gauge wire weighs 600.g less after some wire is pulled off to wind a magnet. How could you calculate how much wire was used?
Diameter of the wire = 0.080 mm
Weight of wire per km = 44.5g
Weight of wire used to wind a magnet = 600 g
Therefore, length of the wire used:
600 g x 1 km/ 44.5g = 13.48 km
The length of the wire used was 13.48 km .
The length of wire that was used is 13.48km
You could calculate how much wire was used by dividing the wire weight in g by the wire weight in per gkm
Length of wire used =Weight of wire in g/
Weight of wire per gkm
Let plug in the formula
Length of wire used=600.g/44.5/gkm
Length of wire used=13.48km
Inconclusion The length of wire that was used is 13.48km
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If 28.0 grams of Pb(NO3)2 react with 18.0 grams of NaI, what mass of PbI2 can be produced? Pb(NO3)2 + NaI → PbI2 + NaNO3
Answer:- 27.7 grams of [tex]PbI_2[/tex] are produced.
Solution:- The balanced equation is:
[tex]Pb(NO_3)_2+2NaI\rightarrow PbI_2+2NaNO_3[/tex]
let's convert the grams of each reactant to moles and calculate the grams of the product and see which one gives least amount of the product. This least amount would be the answer as the least amount we get is from the limiting reactant.
Molar mass of [tex]Pb(NO_3)_2 = 207.2+2(14.01)+6(16) = 331.22 gram per mol
molar mass of NaI = 22.99+126.90 = 149.89 gram per mol
Molar mass of [tex]PbI_2[/tex] = 207.2+2(126.90) = 461 gram per mol
let's do the calculations for the grams of the product for the given grams of each of the reactant:
[tex]28.0gPb(NO_3)_2(\frac{1molPb(NO_3)_2}{331.22gPb(NO_3)_2})(\frac{1molPbI_2}{1molPb(NO_3)_2})(\frac{461gPbI_2}{1molPbI_2})[/tex]
= [tex]39.0gPbI_2[/tex]
[tex]18.0gNaI(\frac{1molNaI}{149.89gNaI})(\frac{1molPbI_2}{2molNaI})(\frac{461gPbI_2}{1molPbI_2})[/tex]
= [tex]27.7gPbI_2[/tex]
From above calculations, NaI gives least amount of [tex]PbI_2[/tex], so the answer is, 27.7 g of [tex]PbI_2[/tex] are produced.
Answer:
27.7 g
Explanation:
i got it right on the test
which of the following statements are TRUE reguarding unicellular and multicellular organisms?
A. Bacteria are made of many cells and are therefore considered multicellular
B. Humans are made up of many cells and are therefore considered unicellular
C. Humans are made of many cells and are therefore considered multicellular
Answer:C
Explanation:
Mark the statement as true or false All of the proposed ideas by Dalton, Thompson, and Rutherford are still used in the modern theory of the atom
False
Although we use many of their ideas to describe atoms today, such as the existence of a tiny, dense nucleus in an atom (proposed by Rutherford), or the notion that all atoms of an element are identical (proposed by Dalton), some of their ideas have been rejected by the modern theory of the atom.
For example, Thompson came up with the plum pudding model to describe an atom, which resembled a sphere of positive charge with electrons embedded in it. We know now, however, that atoms are mostly empty space with a tiny, dense nucleus.
Another example is Dalton's atomic theory, which stated that atoms are indivisible particles. However, this was disproved by the discovery of subatomic particles.
Answer:
Its false
Explanation:
What is the definition of a chemical bond?
A thing used to tie something or to fasten things together.
"she brushed back a curl that had strayed from its bonds"
OR
An agreement with legal force, in particular.
Any of several forces, especially the ionic bond, covalent bond, and metallic bond, by which atoms or ions are bound in a molecule or crystal.
Can someone help me? 20points plz!!!
The answer is 38.05 years
ExplanationTo solve this question, we should convert the given seconds to the year.
So,
Number of seconds in a year = [tex]3.154 * 10^7[/tex]
Seconds the man lived = [tex]11.2 * 10^9[/tex].2 * 10^9
How many years, he lived = ?
Here a unit method will be applied as
Total years the man lived= [tex]1.2 * 10^9/3.154 * 10^7[/tex]
Total years the man lived = 38.05 years
What is the correct representation for the sub shell with n=2 and i= 1
The correct representation for the subshell with n=2 and l=1 is the '2p' subshell, which has three orbitals, each capable of holding two electrons, for a total of six electrons. This follows the notation where 'n' indicates the principal quantum number, and 'l' (the azimuthal quantum number) determines the subshell type.
Explanation:The correct representation for the subshell with n=2 and l=1 is the 2p subshell. In the notation used for electronic configurations, 'n' represents the principal quantum number, which corresponds to the principal shell, and 'l' represents the azimuthal quantum number, which corresponds to the subshell. Since 'l' is equal to 1, we refer to the subshell with the letter 'p'. As such, the entire designation becomes '2p', with the number '2' denoting the principal shell and 'p' denoting the type of subshell.
It is important to note that each principal shell has 'n' subshells. Therefore, with n=2, there are two subshells available which are 2s and 2p. The 2p subshell is allowed because n ≥ 2, while a 2d subshell would not exist since a 'd' subshell begins with n=3.
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Was john dalton a good scientist? why?
he is a good scientist because he postulated that chemical reactions resulted in the rearrangement of the reacting atoms
Final answer:
John Dalton was a good scientist known for laying the foundation of modern atomic theory in Chemistry. Unlike his predecessors, he backed his theories with experimental evidence. His work in the field earned him considerable honor and influence.
Explanation:
John Dalton was indeed a good scientist, and his work had a profound impact on the field of Chemistry. Not only did Dalton lay the foundations of the modern atomic theory, but he also provided experimental evidence to support his ideas, which differentiated him from earlier philosophers who merely speculated about the nature of matter.
Dalton observed that matter combined in fixed ratios and that chemical compounds always contain the same proportion of elements by mass, a concept supporting the law of definite proportions. It's also worth noting that Dalton was recognized for his work in science with numerous honors, and his influence was significant enough that over 40,000 people in Manchester paid their respects at his funeral.
Please help me. If you do, thank you so much!
Page:1
Choice 3 would be correct
Page:2
Choice 3 would be correct again
Page : 3
Choice 3
Page: 4
Yes, This is true
I have no idea what to do with this? Its a Niels Bohr and electons practice sheet. Need help asap
The Bohr model describes the arrangement of electrons in atoms. In magnesium, electrons orbit the nucleus in shells, influencing its reactivity. Sodium's Bohr model explains its outer electron's reactivity, useful in cloud seeding. Both models contribute to understanding atomic structure and behavior.
1. The Bohr model for magnesium involves electrons orbiting the nucleus in quantized energy levels or shells. Magnesium has 12 electrons, with the first two in the innermost shell and the remaining 10 distributed in the subsequent shells. The electrons occupy specific orbits, and transitions between these orbits result in the absorption or emission of energy. The outermost shell, containing two electrons, is not fully filled, making magnesium a reactive metal. The production of uranium involves magnesium compounds acting as reducing agents in various steps.
2. In the Bohr model for sodium, electrons are arranged in shells around the nucleus. Sodium has 11 electrons, with two in the innermost shell and the remaining nine in the outer shell. The outer shell has a single electron in a subshell that is easily lost, leading to sodium's high reactivity. Cloud seeding with sodium salts involves releasing sodium ions into clouds, promoting the coalescence of water droplets and enhancing rainfall. The Bohr model helps explain the electronic configuration and reactivity of sodium.
how do you calculate stig figs?
Hope this helps!! Just always remember it's not that zeros arent important, it's the starting zeros that arent important
So the important numbers is the first number that's between 1-9
Significant figures, also known as sig figs, are a way to express the precision of a measured or calculated value. They help to indicate the number of reliable digits in a measurement or result.
Explanation:Significant figures, also known as sig figs, are a way to express the precision of a measured or calculated value. They help to indicate the number of reliable digits in a measurement or result. To calculate sig figs, follow these rules:
Non-zero digits are always significant.Any zeros between two significant digits are also significant.Leading zeros (zeros before any non-zero digit) are not significant.Trailing zeros (zeros after the last non-zero digit) are only significant if there is a decimal point present.For example, the number 0.00342 has three significant figures, while 5000 has only one significant figure.
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Calcium, carbon dioxide, and water combine to form calcite. True or False?
Answer:
The given statement is True
Explanation:
Calcium, carbon dioxide, and water combine to form calcite. Calcite is a mineral that is composed of calcium carbonate (CaCO3). The chemical reaction that occurs when calcium, carbon dioxide, and water react together to form calcite is called a precipitation reaction.
The stage of the cell cycle that follows mitosis is called _____.
telophase
metaphase
interphase
cytokinesis
Answer:
The correct answer would be cytokinesis.
Cytokinesis is the part of the cell cycle which takes place after telophase of mitosis.
It is the phase during which the cytoplasm or cellular contents of a parent cell are divided into the two daughter cells.
In animal cells, cytokinesis is achieved by cleavage furrow formation whereas, in plant cells, it is achieved by cell plate formation.
An organic compound was synthesized and found to contain only c, h, n, o, and cl. it was observed that when a 0.150 g sample of the compound was burned, it produced 0.138 g of co2 and 0.0566 g of h2o. all the nitrogen in a different 0.200 g sample of the compound was converted to nh3, which was had a mass of 0.0238 g. finally, the chlorine in a 0.125 g sample of the compound was converted to agcl. the agcl, when dried, weighed 0.251 g. determine the percent mass of each of these elements.
The composition is 25.1 % C, 4.22 % H, 9.79 % N, 49.7 % Cl, 11 % O.
We must calculate the masses of C, H, N, Cl, and O from the masses given.
Mass of C in 150 mg X =138 mg CO₂ × (12.01 mg C/44.01 mg CO₂) = 37.66 mg C
Mass of H in 150 mg X = 56.6 mg H₂O × (2.016 mg H/18.02 mg H₂O) = 6.332 mg H
Mass of N in 200 mg X = 23.8 mg NH₃ × (14.01 g N/17.03 g NH₃) = 19.58 mg N
Mass of N in 150 mg X = 19.58 mg N × (150 mg X/200 mg X) = 14.68 mg N
Mass of Cl in 125 mg X = 251 mg AgCl × (35.45 mg Cl/143.32 mg AgCl) = 62.08 mg Cl
Mass of Cl in 150 mg X = 62.08 mg Cl × 150 mg /125 mg X) = 74.50 mg Cl
Mass of O in 150 mg X = (150 – 37.66 -6.332 -14.68 – 74.50) mg = 16.8 mg
% C = 37.66 mg/150 mg × 100 % = 25.1 %
% H = 6.332 mg/150 mg × 100 % = 4.22 %
% N = 19.58 mg/200 mg × 100 % = 9.79 %
% Cl = 62.08 mg/125 mg × 100 % = 49.7 %
% O = 16.8 mg/150 mg × 100 % = 11 %
TOTAL = 100 %
C4H4O62−(aq) + 2 MnO4−(aq) + 8 H3O+(aq) → 2 Mn2+(aq) + 4 CO2(g) + 14 H2O(l)
element being reduced
element being oxidized
I really do not understand how to do this at all
Oxidized is that which goes up in oxidation number. The Fe goes from +2 to +3. Reduced goes down. Mn goes from +7 to +2. The oxidizing agent gets reduced. Mn. The reducing agent gets oxidized.
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Describe erosion in your own words
When the wind or water removes soil rock or dissolved material from one location to another
Erosion is the process where materials are moved from one place to another, it can be caused my water, wind, or other natural agents. it can also wear down the material in the process.
Which of the following statements is true about ions?
A. Anions are positively charged ions.
B. Cations are common among nonmetals.
C. Charges for ions are always written as numbers followed by a plus or minus sign.
D. When an anion forms, more electrons are transferred to it.
When an anion forms, more electrons are transferred to it.
Anions are negatively-charged ions that is when an anion forms, more electrons are transferred to it. Anions are common among non metals.
Cations are also called positive ions. Cations are common among metals.
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The correct option is D, as anions are negative ions formed by the transfer of extra electrons to a nonmetal atom, which leads to a negative charge.
Explanation:The true statement about ions among the options provided is D. When an anion forms, more electrons are transferred to it.
Anions are negative ions formed when a nonmetal atom gains one or more electrons, therefore increasing its number of electrons compared to protons, which results in a negative charge. Nonmetals, especially those in groups 16 and 17 of the periodic table, readily form anions by gaining electrons to achieve the electron configuration of the next noble gas. In contrast, cations are positive ions formed when a metallic atom loses one or more electrons from its valence shell. Therefore, the idea that cations are common among nonmetals is incorrect, as nonmetals typically form anions.
The charge of ions is indeed indicated with a number followed by a plus or minus sign, as stated in option C. However, it is critical to note that the convention is to write the sign first, then the magnitude of the charge.
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Determine the number of miles of H in each sample;
4.52 mol H2O?
8.43 mol NH3?
0.102 mol N2H4?
35.0 mol C10H22?
1) Answer is: there are 9.04 moles of the hydrogen in 4.52 mol of the water.
n(H₂O) = 4.52 mol; amount of the water molecules.
In one molecule of the water, there are two hydrogen atoms.
n(H₂O) : n(H) = 1 : 2.
n(H) = 2 · n(H₂O).
n(H) = 2 · 4.52 mol.
n(H) = 9.04 mol; amount of the hydrogen atoms.
2) Answer is: there are 25.29 moles of the hydrogen in 8.43 mol of the ammonia (NH₃).
n(NH₃) = 8.43 mol; amount of the ammonia molecules.
In one molecule of the ammonia, there are three hydrogen atoms.
n(NH₃) : n(H) = 1 : 3.
n(H) = 3 · n(NH₃).
n(H) = 3 · 8.43 mol.
n(H) = 25.29 mol; amount of the hydrogen atoms.
3) Answer is: there are 0.408 moles of the hydrogen in 0.102 mol of the hydrazine (N₂H₄).
n(N₂H₄) = 0.102 mol; amount of the hydrazine molecules.
In one molecule of the hydrazine, there are four hydrogen atoms.
n(N₂H₄) : n(H) = 1 : 4.
n(H) = 4 · n(N₂H₄).
n(H) = 4 · 0.102 mol.
n(H) = 0.408 mol; amount of the hydrogen atoms.
4) Answer is: there are 770 moles of the hydrogen in 35.0 moles of the decane (C₁₀H₂₂).
n(C₁₀H₂₂) = 35.0 mol; amount of the decane molecules.
In one molecule of the decane, there are twenty two hydrogen atoms.
n(C₁₀H₂₂) : n(H) = 1 : 22.
n(H) = 22 · n(C₁₀H₂₂).
n(H) = 22 · 35.0 mol.
n(H) = 770 mol; amount of the hydrogen atoms.
For H2O, NH3, N2H4 and C10H22, the respective numbers of moles of Hydrogen are: 9.04, 25.29, 0.408, and 770.
Explanation:To determine the number of miles of Hydrogen (H) in each sample, we first need to recognize that in each molecule of H2O there are two atoms of hydrogen, in each molecule of NH3 there is three atoms of hydrogen, in each molecule of N2H4 there are four atoms of Hydrogen and in each molecule of C10H22 there are twenty-two atoms of Hydrogen.
Then, to get the number of moles of Hydrogen you multiply the number of moles of the compound by the number of hydrogen molecules in that compound. For example, for H2O, you have 4.52 moles * 2 = 9.04 moles of H.
Therefore, for H2O, NH3, N2H4 and C10H22, we have:
4.52 mol H2O * 2 = 9.04 moles of H 8.43 mol NH3 * 3 = 25.29 moles of H 0.102 mol N2H4 * 4 = 0.408 moles of H 35.0 mol C10H22 * 22 = 770 moles of HLearn more about Determining Moles of Hydrogen here:https://brainly.com/question/32856309
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