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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Calculate the number of molecules in 2.86 g CO2.
A. 6.48 x 1015
B. 1.30 x 1022
C.3.91 x 1022
D. 1.17 x 1023
E. 9.26 X 1024
Atoms constitute single neutral particles, and there are 3.91 x 1022 molecules in 2.86 g of CO2. By bonding together two or more atoms, molecules are neutral particles.
WHAT IS a molecule, and give some examples?The smallest component of a material, a molecule is made up of two or more atoms that are joined by chemical bonds and preserve the structure and characteristics of the larger substance. Chemistry is built on molecule-level principles. A subscript indicating the number of atoms is used after the element symbol to identify molecules.
How do you refer to the smallest molecule?An atom is the tiniest component of an element and shares all of its chemical characteristics with the element as a whole. Dalton's Atomic Theory was the first valid theory describing the makeup of stuff. 1. Atoms were indivisible and unbreakable, and they make up all matter.
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Complete the abundance diagram. below, by identifying the species present n an aqueous solution of 1.00 M acetic acid (CH3COOH). The Ks, of acetic acid is 1 8 times 10-3 Noting to transcribe What is the approximate pH of a solution of 1.00 M CH3COOH?
The abundance diagram is as attached in the image.
The approximate pH of a solution of 1.00 M CH3COOH is less than 4.74.
In chemistry, pH, which originally stood for "potential of hydrogen," is a scale used to determine the acidity or basicity of an aqueous solution. Acidic solutions (solutions with greater H+ ion concentrations) have lower pH values than basic or alkaline solutions.
The pH scale may be traced back to a collection of standard solutions whose pH has been determined by worldwide agreement.
The potential difference between a hydrogen electrode and a standard electrode, such as the silver chloride electrode, is measured in a concentration cell with transference to derive primary pH standard values.
A glass electrode with a pH metre, or a color-changing indicator, can be used to test the pH of aqueous solutions. pH measurements are critical in chemistry, agronomy, medicine, water treatment, and a variety of other fields.
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Can someone help me please. The elements are made up but similar to real elements. Can someone check if my answers are correct. Please help someone. No fake answers please. I genuinely need help
Yes, it is the right response. Although the elements are imaginary, they resemble actual elements .Nomenclature is an organism name system used in biological classification.
What does nomenclature mean?The Latin words nomen (name) and calare (to call) are the source of the word nomenclature. Both the Latin word nomenclatura and the English word nomenclator, which also denotes a source or broadcaster of names, relate to a list of names.
What exactly is nomenclature and how is it crucial?Nomenclature is an organism name system used in biological classification. Genus & species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species whereby the creature belongs.
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Complete the Lewis dot structure for C2F6 (which contains a C?C bond). Complete the molecule by placing fluorine atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
Lewis structure is the representation of the valence shell electron in a molecule. Lewis structure of C2F6 can be represented by the Lewis dot structure rule.
Lewis dot Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms. First we have to draw a skeletal structure for the molecule. Then Count total number of valence electrons in the molecule. Then assign 2 electrons to each bond. If there are remaining electrons, they can be used to complete the octet of the central atom. If we have run out of electron, we are required to use lone pairs of electrons from a terminal atom to complete the octet on the central atom by forming multiple bond(s).
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When DNA replication is complete the end result is two identical molecules that are each half old and half original strand What is this type of replication called?
Semiconservative replication is a type when DNA replication is complete the end result is two identical molecules that are each half old and half original strand
Having one strand makes it feasible to replicate the other strand since the two strands complement one another. According to this concept of replication, the double helix's two strands separate during the replication process and each one acts as a template from which the next complimentary strand is copied.
Each of the two strands that make up the double helix acts as a template from which new strands are copied during DNA replication. The parental or "old" strand and the new strand will complement one another. One new daughter strand and one new parental strand make up each new double strand. Semiconservative replication is what is meant by this. When two DNA copies are created, they are equally divided into two daughter cells and have an identical nucleotide base sequence.
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if a 10.0 g sample of cobalt -60 is left alone how much will be left after 21.2 years the half-life of cobaltt-60 is 5.3 years
If a 10.0 g sample of cobalt -60 is left alone 0.63 g will be left after 21.2 years the half-life of cobaltt-60 is 5.3 years.
What is half life period ?The term half life period is defined as the time required by a radioactive substance to transform into a different substance.
Given :
T = half life of cobalt-60
= 5.3 years
λ = decay constant for cobalt-60 = ?
decay constant is given as follows
λ = 0.693 / T
Substituting the given values
λ = 0.693/5.3
= 0.131
N₀ = initial amount of cobalt-60
= 10 g
t = time of decay
= 21.2 years
N = final amount of cobalt-60 after time "t"
final amount of cobalt-60 after time "t" is given as
N = N₀
Substituting given values
N = 10
N = 10 x 0.0622 g
N = 0.63 g
Thus, if a 10.0 g sample of cobalt -60 is left alone 0.63 g will be left after 21.2 years the half-life of cobaltt-60 is 5.3 years.
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Determine whether 1-chloro-2-methylbutane contains a chiral center. How many different substituents do you count at atom #(2)? (To help yourself, draw 1-chloro-2-methylbutane on a piece of paper.). Submit Answer Try Another Version 1 item attempt remaining
1-chloro-2-methylbutane does not contain a chiral center. A chiral center, also known as a stereogenic center, is a carbon atom that is bonded to four different substituents.
In this molecule, the carbon atom at position 2 is bonded to a chlorine atom, a methyl group, and two methylene groups, so it is not a chiral center.
There are two different substituents at atom #2, a chlorine atom and a methyl group. This is because atom #2 is bonded to a chlorine atom and a methyl group, which are chemically distinct and different from one another.
It's worth noting that the presence of chiral centers in a molecule is important because it can give rise to stereoisomers, which are molecules that have the same chemical formula and bonding arrangement, but differ in the arrangement of atoms in space.
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Dissolved oxygen is very important for the survival of aquatic life. Which of the abiotic factors influence dissolved oxygen?.
The abiotic factors that influence dissolved oxygen include temperature, salinity, and sunlight.
What is an abiotic factor?
An ecosystem can be shaped by abiotic factors, which are non-living components. Examples may be the amount of heat, light, or water in a terrestrial ecosystem. Ocean currents and salinity are examples of abiotic elements in a marine ecosystem. A unique ecosystem is made possible by the interaction of biotic and abiotic elements.Abiotic variables can be made up of substances including water, light, radiation, heat, humidity, atmosphere, acidity, and soil. On the persistence and procreation of species in an ecosystem, these variables have a considerable bearing.Biologic and abiotic elements coexist in ecosystems. Water, soil, and the atmosphere are examples of abiotic factors, which make up an ecosystem but do not contain any live species; biotic factors, on the other hand, include things like bacteria, plants, and animals.To learn more about an abiotic factor refer to:
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The Lewis structure of acetone (CH3)2CO is shown below. (i) Predict the arrangement of the electron pairs around the three C atoms and the O atom using VSEPR theory. (ii) Assign the hybridisation of the three C atoms and the O atom
Acetone, (CH3)2CO, has 3 sp3 hybridized carbon atoms and 1 sp2 hybridized oxygen atom, according to VSEPR theory. The carbon atoms are tetrahedral and oxygen atom is trigonal planar in shape.
i) Using VSEPR theory, we can predict the arrangement of electron pairs around the atoms in a molecule. The Lewis structure of acetone shows that the carbon atoms have four electron pairs around them (two from the single bonds and two from the double bond) and the oxygen atom has two electron pairs around it.
The carbon atoms are all sp3 hybridized, and the oxygen atom is sp2 hybridized.
ii) The three carbon atoms in acetone each have four electron pairs around them, which means they are tetrahedral in shape. Therefore, they are all sp3 hybridized. The oxygen atom has two single bonds and one double bond around it, which means it is trigonal planar in shape. Therefore, it is sp2 hybridized.
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draw the structure of periodic acid hio4 optimize formal charges
The structure of periodic acid [tex]HiO_{4}[/tex] attached at end of the solution.
The formal charge of [tex]HiO_{4}[/tex] is zero.
Lewis structures illustrate the bonds forming between the various atoms in covalent compounds. These further demonstrate the molecule's lone pairs. Lewis dot diagrams, electron dot diagrams, Lewis dot structures, and Lewis dot formula are other names for them. These structures can predict the shape, polarity, and reactivity of covalent compounds.
First, determine the total number of valence electrons. The H atom (group 1) has one valence electron, the I atom (group 17) has seven, and the O atoms have six valence electrons (group 16).
Take two electrons away from each bond in the skeletal framework. In this form, the 5 bonds each receive 10 of the 32 valence electrons.
The other O atom receives the final two valence electrons, completing the octets for the terminal O atoms. Because the iodine atom does not yet have a complete octet.
The diagram is attached at the end of the solution.
Formal charge = v - l - [tex]\frac{b}{2}[/tex]
v = valence electron on a free atom
l = lone pair electrons in bonding atoms
b = bond pairs of electrons
Therefore formal charge on I = +3, 3O = -1
Thus formal charge of [tex]HiO_{4}[/tex] = zero.
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12.0 grams of Barium nitrate react with 6.0 grams of sodium sulfate in a double replacement reaction.Write out the complete balanced reaction including states of matter: What is the theoretical yield of solid compound that we will be able to produce?B.What is the limiting reactant and excess reactant?C. Calculate the quantity of excess reactant remaining.D. Suppose in the lab you actually collected 9.5 grams of the solid compound. Calculate the percentyield of the reaction
A chemical equation shows the reactants (left side) and products (right side) in a chemical reaction.
What is chemical reaction?chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.
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Please help
6.0 mol Al reacts with 4.0 mol O2 to
form Al2O3.
4AI + 302 → 2Al2O3
How many moles of Al2O3 form when
4.0 mol O2 reacts?
[?] mol Al2O3
The number of mole of Al₂O₃ formed when 4.0 moles of O₂ reacts, given the reaction is 2.67 moles
How do I determine the number of mole of Al₂O₃ formed?From the given stoichiometry of the reaction (i.e 6.0 moles of Al reacts with 4.0 moles of O₂ to form Al₂O₃), we can see that O₂ is the limiting reactant.
Knowing that O₂ is the limiting reactant we can easily determine the number of moles of Al₂O₃ formed when 4.0 moles of O₂ reacts as follow:
4Al + 3O₂ -> 2Al₂O₃
From the balanced equation above,
3 moles of O₂ reacted to produce 2 moles of Al₂O₃
Therefore,
4 moles of O₂ will react to produce = (4 moles × 2 moles) / 3 moles = 2.67 moles of Al₂O₃
Thus, we can conclude from the above calculation that the number of moles of Al₂O₃ formed is 2.67 moles
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Answer: 2.67
Explanation:
Balance the following equations
N2O5 -> N2O4 + O2
KNO3 -> KNO2 + O2
NH4NO2 -> N2 + H2O
O3 -> O2
Zn + AgCl -> ZnCl2 + Ag
NaOH + H2SO4 -> NA2SO4 + H2O
Balance equation is 2NaOH + H2SO4 → Na2SO4+2H2O.
1) N2O5 -> N2O4 + O2 Balance equation
N2O5 = N2O4 + 1/2O2 eq. as written
N two on left and two on right
O five on left and six on right. Easiest fix make 1/2O2. Now O five on left and five on right.
Or multiply each side by two to get.
2N2O5 = 2N2O4 + O2
N is 4=4 and O is 10=10
2) KNO3 -> KNO2 + O2 Balance equation
On heating potassium nitrate decomposes to produce potassium nitrite along with oxygen gas.
The balanced chemical equation of the reaction is as follows-
2KNO3 ->2 KNO2 + O2
3) NH4NO2 -> N2 + H2O Balance equation
NH4NO2=2H2O+N2
N-2,2 balanced
H-4,4balanced
O-2,2balanced
4)O3 -> O2 Balance equation
is 2O3 = 3O2
5) Zn + AgCl -> ZnCl2 + Ag Balance equation
is Zn+2AgCl→ZnCl2+2Ag
6) NaOH + H2SO4 -> NA2SO4 + H2O Balance equation
is 2NaOH + H2SO4 → Na2SO4+2H2O.
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2.
Much of the cost of coal use in the United States comes from transporting it across
the country. If 8% of the price of coal is spent on transportation, how much money is
lost to transportation per short ton?
The cost of coal per short ton in the United States is approximately $50. 8% of this would be $4, meaning that the amount of money lost to transportation per short ton is $4.
What is transportation?Transportation is the movement of people or goods from one place to another. It is a critical part of the global economy and is a key factor in the development of social and economic opportunities. Transportation is also an important factor in the quality of life of individuals and communities. There are many different types of transportation, including public transit, such as buses, trains, and subways; private transit such as taxis, carpools, and ride sharing; and personal transportation such as cars, motorcycles, and bicycles. Transportation is an essential tool for connecting people and goods to the places they need to go, and for providing access to essential goods, services, and opportunities. It is also a key factor in the development of cities and urban areas, as well as in the movement of people and goods between countries and continents.
This is due to the cost of transporting coal from the mine to the point of sale, which can include costs such as fuel, labor, and infrastructure.
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How to find partial pressure from mole fraction and total pressure?
To find partial pressure from mole fraction, we have to multiply mole fraction with total pressure in the event.
How to calculate partial pressure using an example?The formula for partial pressure is expressed as Pfraction = molefraction x Ptotal. Partial pressure is the result of multiplying the mole fraction by the total pressure. Let's look at the example below to make it simpler for you to understand:
Consider a chamber with 2.611 atm of pressure, 24.2 g of He, and 4.32 g of O₂. In this instance, we must first get the mole fraction before calculating the partial pressure.
24.2 g Neon x 1 mol Neon / 20.18 g Neon = 1.199 mol Neon
4.32 g Oxygen x 1 mol Oxygen / 31.998 g O₂ = 0.135 mol Oxygen.
Total moles = 1.199 x 0.135 = 1.334 mol gas
Mole fraction Ne = 1.199 mol/1.334 mol = 0.899
Mole fraction O₂ = Oxygen: 0.135/1.334 = .101
Then find the partial pressure
PNe = mole fraction Ne x Ptot = 0.899 x 2.611 atm = 2.35 atm
PO2 = mole fraction O ₂ x Ptot = 0.101 x 2.611 atm = 0.264 atm
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A space probe is launched into space from Earth’s surface. Which graph represents the relationship between the magnitude of the gravitational force exerted on Earth by the space probe and the distance between the space probe and the center of Earth? Explain your answer. If you don't know, please don't answer, cause this is for a test worth 80% of my grade.
What is the mass in grams of 0.700 moles of water, H2O?
answer choices
18.02g/mol
18.04g/mol
12.6g/mol
14.00g/mol
The mass in grams of 0.700 moles of water (H₂O) = 12.6g/mol (option C)
The mass of a chemical in a mole is known as its molar mass.
It is the total atomic mass of every element that is present in that molecule. The molar mass unit is g/mol.
Determine the molar mass of the water(H₂O):
Molar masses of 1 g/mol of hydrogen and 16 g/mol of oxygen make up a mole.
The chemical formula for water is H₂O.
The water's molar mass is thus:
H₂O = (2 x 1) + 16
= 18 g/mol
Moles of water = 0.700
The molar water (H₂O) mass = 18 g/mol
Object's mass is determined by:
m = (moles of the sample) x (molar mass of the compound)
So, mass of the water (H₂O):
= (0.700) x (18)
= 12.6 g/mol
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How many moles of silver bromide will be produced from 26.7 moles of sodium
bromide?
26.7 moles of sodium bromide will produce 26.7 moles of silver bromide.
What is sodium bromide?Sodium bromide is an inorganic compound with the chemical formula NaBr. It is a white, crystalline solid that is highly soluble in water. It is used in a variety of applications, including as a source of bromide ions in chemical synthesis, as a fire reta rdant, and as a disin fectant. It is also used in photography, medicine, and in the production of bromine compounds. In medicine, it is used as a sedative and anticonvulsant.
This is because the reaction between sodium bromide and silver nitrate is a 1:1 mole ratio reaction.
This means that for every mole of sodium bromide, one mole of silver bromide will be produced.
Therefore, 26.7 moles of sodium bromide will produce 26.7 moles of silver bromide.
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How many moles are there when you have 3.5 g SO3?
Draw the structure for:
a). 1,5-dichloro-3-hexyne.
The structure of 1,5-dichloro-3-hexyme consists a six-carbon atom long chain with a triple bond at the third carbon and two chlorine (Cl) atoms attached at the first and fifth carbon positions.
Alkynes are classified into two types. The first has a triple bond at the ends of the carbon chain and is known as a terminal alkyne, while the second has a triple bond somewhere inside the longest carbon chain and is known as internal alkyne.
In the structure of 1,5-dichloro-3-hexyme, the term "3-hexyme" refers to an alkyne with a triple bond between the third and fourth carbon atoms in the longest chain, and "1,5-dichloro" refers to the presence of two chlorine atoms at the first and fifth carbons.
The skeletal structure of 1,5-dichloro-3-hexyne is shown below.
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A 58.0 g sample of unknown composition was carefully analyzed and found to consist of 24.3 g of carbon, 3.072 grams of hydrogen, 5.406 g of oxygen, and the remainder of nitrogen.
Answer:
Mass of nitrogen = 25.222g
Explanation:
We know that the mass of the unknown composition is 58.0g, so the total mass must add up to 58.0g, so let's make the unknown mass of nitrogen = x
24.3g + 3.072g + 5.406g + x = 58.0g
32.778g + x = 58.0g
x = 58.0g - 32.778g = 25.222g
A and B are independent events. Find P(A and B).
1
3
P(A) = P(B) = 7
P(A and B)=
elements If Actions A and B exist independent, then P(A or Bi) = P(A) Plus P(B) - P(A or B) = 7/9 is the chance that either Incident A or Event B will occur.
CAN A and B be independent and mutually exclusive?It is crucial to remember that two mutually incompatible events cannot coexist unless one of them has a probability of occurring, as P (A B) = P (A) P (B) for independent events, and the sole way a product may equal zero is if either of the elements is also zero.
What is the likelihood of two related events?dependent occurrences When the result of the first event affects the result of the second event, two events are dependent. The likelihood of two connected events is the.
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What do the elements highlighted in red have in common?
answer choices
The same number of protons.
The same number of electrons.
The same number of neutrons.
The same number of electron shells
The elements highlighted in red have the same number of electron shells
in common. The correct answert is D.
A row of chemical elements makes up a period in the periodic table. The number of electron shells is the same for every atom in a row. Periods are the horizontal divisions or rows in the periodic table, and groups are the vertical divisions or columns.
Periods are shown in the table from top to bottom, numbered 1 through 7. Because they have the same number of orbitals, elements with the same period have identical masses but different characteristics. In other words, the electrons on the same outermost level, which is precisely the number that distinguishes each period, are a characteristic of the elements of a certain period. For instance, the third period elements have electrons up to level three.The number of the energy level increases as the periodic table's period numbers do.
The items with a red highlight share the trait of being from the same period, which is period two. As a result, electrons can now reach level 2.
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Bromination of p-methylbenzoic acid
Chlorination of o-benzenedicarboxylic acid
Bromination of p-chlorobenzoic acid
Nitration of p-fluoroanisole
Nitration of p-methoxybenzaldehyde
Nitration of p-tert-butylmethylbenzene
When benzene has both a strong and weak activator group, only the strong activator guides the electrophile towards ortho or para to the that activator group.
An illustration of an electrophileBecause they lack an electron, electrophiles can receive a pair of electrons from organisms that have an abundance of them. Examples include carbonyl compounds and carbocations. A nucleophile is a species that has an abundance of electrons and gives electron pairs to species that lack electrons. Carbanions, water, ammonia, cyanide ions, and others are examples.
What part does the electrophile play?A chemical species known as an electrophile in chemistry accepts an electron pair from nucleophiles to form bonds with them. Electrophiles are Lewis acids because they are electron-accepting molecules.
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a diagram of electronic configuration
A model that shows how electrons orbit atom nuclei is known as an electronic configuration diagram.
What does atomic number mean?The number of protons in an atom's nucleus or the number of electrons in an electrically neutral atom is the atomic number of that element. The capital letter Z is used to represent it. Atomzahl, a more contemporary word for atomic number in German, is where the letter Z gets its name.
How is an electronic configuration made?Electrons are arranged around the central nucleus in energy levels, or shells, and are shown as dots or crosses. It known as electrodot diagrams display the distribution of an atom's valence electrons as dots around the element's symbol.
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What is the difference between composition and reaction stoichiometry?
The main distinction between composition and reaction stoichiometry is that while reaction stoichiometry relates to the number of compounds consumed or created during a chemical reaction, composition stoichiometry refers to the atomic makeup of a chemical compound.
The formulation is frequently referred to as a composition. Formulas are merely combinations of molecules that will combine to make plastics like polyesters, polyurethanes, and epoxies, among others.
The ratio of the reactive groups in the base resin to those in the hardeners is known as reaction stoichiometry. Each component resin and hardener reactive]'s equivalent weight is used to express this.
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807 grams of znso4 equals how many moles
Answer:
807 g = 4.9987 (Rounded Answer)
Explanation:
807 grams = 4.998680645628887 mol
How many carbon atoms are there in 12.0 grams of carbon?
6.022 ×10²³ atoms are present in 12.0 grams of carbon.
Mole (mol) is the amount of material counting 6.02214 × 10²³ particles
The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12.
12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 10²³ atoms
The number of particles in 1 mole is called Avogadro’s Number (6.0221421 x 10²³).
6.022 ×10²³atoms/1mol
or
1 mol/6.022 ×10²³ atoms
Molar Mass is the mass of 1 mol of atoms of an element
An element’s molar mass in g/mol is numerically equal to the element’s atomic mass in amu.
1 mol C/12.01 g C
or
12.01 g C/ 1mol C
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3. Which property remains unaffected during the rock cycle? *
Magma
Igneous rock
Crystallization
of magma
Melting
Magma from molten
curst and mantle
Weathering
and erosion
Slow uplift to
the surface
Transport
and
deposition
Metamorphic rock
Sedimentar
Compaction and cemer
Sedimentary rock
Burial, high temperatures
and pressures
Which type of soil would likely drain water the fastest?
Sandy soil would likely drain water the fastest.
Soil is composed of minerals, organic matter, water and gas. It is divided into three classes viz. sand, silt and clay.
The ability of a soil to absorb or drain water depends upon the pore size of the soil particles.
In case of clayey soil, the pore size is comparatively large than sandy soil so clayey soil will absorb the water molecules in its pores .On the other hand, the pore size of sandy soil is relatively small, so it cannot retain the water in its pores, hence it can drain water easily.
Due to this reason, sandy soil is usually used in filtration process.
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