2. List the layers of Earth from the center out to the crust. What is the composition of each layer?
At what temperature would a 1.50 m nacl solution freeze, given that the van't hoff factor for nacl is 1.9? kf for water is 1.86 ∘c/m .
Final answer:
To determine the freezing point of a 1.50 m NaCl solution, we need to calculate the freezing point depression using the formula: ΔT = Kf × m × i, where ΔT is the freezing point depression, Kf is the freezing point depression constant for water, m is the molality of the solution, and i is the van 't Hoff factor. In this case, the van 't Hoff factor for NaCl is given as 1.9. The freezing point of the solution can be found by subtracting the calculated freezing point depression from the freezing point of pure water.
Explanation:
To determine the freezing point of a 1.50 m NaCl solution, we need to calculate the freezing point depression using the formula:
ΔT = Kf × m × i,
where ΔT is the freezing point depression, Kf is the freezing point depression constant for water, m is the molality of the solution, and i is the van 't Hoff factor. In this case, the van 't Hoff factor for NaCl is given as 1.9.
Let's substitute the given values into the formula:
ΔT = 1.86 °C/m × 1.50 m × 1.9,
ΔT = 5.31 °C.
To find the freezing point of the solution, we subtract the calculated freezing point depression from the freezing point of pure water, which is 0 °C:
Freezing point = 0 °C - 5.31 °C = -5.31 °C.
Therefore, the 1.50 m NaCl solution would freeze at a temperature of -5.31 °C.
What is the name of this hydrocarbon
Answer : The name of the given hydrocarbon is, 2-methylpropane.
Explanation :
The basic rules for naming of organic compounds are :
First select the longest possible carbon chain.For the number of carbon atom, we add prefix as 'meth' for 1, 'eth' for 2, 'prop' for 3, 'but' for 4, 'pent' for 5, 'hex' for 6, 'sept' for 7, 'oct' for 8, 'nona' for 9 and 'deca' for 10.A suffix '-ane' is added at the end of the name of alkane.If two of more similar alkyl groups are present, then the words 'di', 'tri' 'tetra' and so on are used to specify the number of times these alkyl groups appear in the chain.In the given hydrocarbon, the longest possible carbon chain number is 3 that means we add prefix 'prop' and suffix '-ane' and a substituent present at 2nd position of the longest carbon chain. So, the name of given hydrocarbon will be, 2-methylpropane.
Hence, the name of the given hydrocarbon is, 2-methylpropane.
When parasites are found in food, the food has been exposed to _____ contamination.
Answer: Coli contamination/ E.coli contamination
Explanation:
When there are harmful substance in, whether microorganisms or chemicals in food which can cause adverse effects on animals, the term for it is called food contamination. Food contamination can be caused contamination by pathogenic bacteria, viruses, and protozoa.
One of the microorganisms that can be found in food and poses threat to animals life is the Escherichia coli. Escherichia is a bacteria. Naturallyy, the Escherichia coli can be found in animals(including humans) intestines. So, some kinds might be harmless.
While some are poisonous and cause food poisoning. Some of the symptoms include: pneumonia, diarrhea, respiratory illness and so on.
Count: electrons move around the nucleus of atoms in specific shells, shown by the rings around the atoms in the gizmo. the first ring holds two electrons, and the second holds eight. (electrons in the inner rings are not shown; you can assume these rings are full.)
a. observe the sodium and chlorine atoms. assuming that the inner rings are full of electrons, how many electrons are there total in each atom? sodium: ____________________ chlorine: ___________________
b. each atom is neutrally charged, which means that each atom has the same number of protons and electrons. based on this, how many protons are in each atom? sodium: ____________________ chlorine: ___________________
A neutrally charged atom has the same number of electrons and protons. Therefore, a sodium atom has 11 electrons and 11 protons, while a chlorine atom has 17 electrons and 17 protons.
Explanation:A given atom's electron count can be identified by looking at its atomic number because a neutrally charged atom has an equal amount of protons and electrons. Sodium has an atomic number of 11, which means it has 11 electrons if it is neutrally charged. Similarly, chlorine, with an atomic number of 17, has 17 electrons.
As stated, a neutrally charged atom has an equal number of protons and electrons. Thus, the proton count is also dictated by the atomic number. Sodium, therefore, has 11 protons, and chlorine will have 17 protons.
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Express the equilibrium constant for the combustion of propane in the balanced chemical equation c3h8(g)+5o2(g)???3co2(g)+4h2o(g)
Answer:
combustion reaction
Explanation:
there is oxides in the equation c3h8(g)+5o2(g)3co2(g)+4h2o(g)
Which acid is the strongest? pH = 0.5 pH = 2.0 pH = 3.5 pH = 5
Answer:
The most acidic or strongest acid is with pH equal to 0.5
Explanation:
The pH of the solution is defined as negative logarithm of [tex]H^+[/tex] concentration.
Mathematically can written as:
[tex]pH=-\log[H^+][/tex]
[tex]pH\propto \frac{1}{[H^+]}[/tex]
From the above expression we can see that pH of the solution is inversely related to the concentration of the [tex]H^+[/tex] ions.
This means that higher the concentration of [tex]H^+[/tex] ions in the solution higher will be pH and more acidic will be the solution.
So, from the given option the most acidic or strongest acid is with pH equal to 0.5 because the concentration [tex]H^+[/tex] ions is highest in this solution with respect to other solutions.
How Many Atoms Are In 356.13 Grams Of Sn
There are three atoms of Sn (Stannous or Tin) in 356.13 g of Sn.
One atom of Sn has the atomic mass (mₐ) of 118,71u which means:
356.13/118.71=3 atoms of Sn
The mass number (symbol A) also called atomic mass number or nucleon number is the total number of protons and neutrons in an atomic nucleus. It determines the atomic mass of atoms and it is in the periodic table.
What does it mean to standardize the naoh solution why can the molarity of the naoh solution not be determined accurately?
Standardizing a NaOH solution means determining its accurate concentration or molarity. It's necessary because factors like air exposure and the hygroscopic nature of NaOH can distort the accurate measurement of NaOH's weight, leading to inaccurate calculation of molarity. By titration using a known concentration solution, NaOH's accurate molarity can be determined.
Explanation:Standardizing a solution, in this case a NaOH solution, means to accurate determine the concentration (Molarity) of the solution. It is important because the concentration of NaOH cannot be determined accurately just by dissolving it in water. This is due to factors like air exposure and the hygroscopic nature of NaOH,
Hygroscopic substances absorb moisture from the air, and so the actual weight and hence, the accordant molar concentration of the NaOH in the solution can be distorted. But, by a process known as titration, using a solution of accurately known concentration to react with the NaOH solution, the molarity can be determined accurately.
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Final answer:
Standardizing a NaOH solution is necessary to accurately determine its concentration due to the presence of impurities and water absorption. The process involves titrating the NaOH against a primary standard like KHP. Without standardization, the molarity of NaOH solution cannot be precisely known.
Explanation:
Standardizing a NaOH Solution:
To standardize the NaOH solution means to accurately determine its concentration because NaOH solid often contains impurities and absorbs water from the atmosphere, which affects its molarity. The process typically involves titrating NaOH against a primary standard such as potassium hydrogen phthalate (KHP). A carefully weighed amount of dry KHP is dissolved in water and titrated with the NaOH solution. The point at which the reaction between KHP and the NaOH is complete (the endpoint) allows for the calculation of the NaOH's molarity.
One reason the molarity of an NaOH solution cannot be determined accurately without standardization is because commercially available NaOH contains impurities such as sodium chloride (NaCl), sodium carbonate (Na₂CO₃), and sodium sulfate (Na₂SO₄), and it readily absorbs water (H₂O). As a secondary standard, its exact concentration is not known unless standardized against a primary standard.
If we want to prepare 2 liters of a 0.100 M NaOH solution, we would use the equation: Mass NaOH = Molarity (M) x Molar Mass NaOH x Volume NaOH (L). For NaOH with a molar mass of 40.0 g/mol, the calculation is 0.100 mol/L x 40.0 g/mol x 2.00 L, resulting in 8.00 g of NaOH required.
Is the Hertzsprung-Russell diagram still a valid instrument in studying stars, given that it is over 100 years old?
Answer:
Yes.
Explanation:
Hello,
As long as it shows important relationships between the size and color of stars, age wouldn't affect observation and measurement but will just provide more accurate results but the method is still valid.
Best regards.
Answer:
Yes.
Explanation:
A solution contains 0.133 g of dissolved Lead. How many moles of soduim chloride must be added to the solution to completly precipitate all of the disolved lead?
Calculate the root mean square velocity of gaseous argon atoms at 26 ∘c.
The root mean square velocity of gaseous argon atoms at 26 °C is 364.42 m/s.
Explanation:The root mean square velocity of gaseous argon atoms can be calculated using the equation Vrms= √(3kT/m), where k is the Boltzmann constant, T is the temperature, and m is the mass of the particle.
To calculate the velocity, we need to convert the temperature to Kelvin by adding 273.15 to the value in degrees Celsius. In this case, the temperature is 26 °C, so T = 26 + 273.15 = 299.15 K.
Substituting the given values and the molar mass of argon into the equation, we get Vrms= √(3 (1.38x10-23 J/K) (299.15 K) / (39.948 g/mol)) = 364.42 m/s.
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The root mean square speed of gaseous argon atoms at 26 degrees Celsius is calculated using the root mean square equation and the constants for the Boltzmann constant and the molar mass of argon. The temperature is also converted to Kelvin.
Explanation:In order to calculate the root mean square velocity of gaseous argon atoms at 26 degrees Celsius, we have to use the root mean square speed equation, which is also known as the urms equation. The urms is a measure of the average speed for a group of particles. This equation is calculated as the square root of the average squared speed.
Firstly, we need to convert the temperature to Kelvin by adding 273.15 to the Celsius temperature. Hence, the temperature (T) becomes 299.15K.
The formula for root mean square velocity is Vrms = sqrt(3kT/m) where k is the Boltzmann constant (1.38×10−23 J/K) and m is the molar mass of argon which is 39.95g/mol. Please note, that the molar mass should be converted to kg/mol which becomes 39.95x10^-3 kg/mol.
So, urms=sqrt[(3)(1.38×10−23 J/K)(299.15K)/(39.95x10^-3 kg/mol)]. This will give you the root mean square speed of gaseous argon atoms at 26 degrees Celsius.
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Which element's atomic radius increases the most in size when it becomes ionized? A. Sodium B. Chlorine C. Fluorine D. Lithium
Be sure to answer all parts. treatment of (hoch2ch2ch2ch2)2co with acid forms a product of molecular formula c9h16o2 and a molecule of water. draw the structures of the starting material, intermediate, and final product in the corresponding boxes below. part 1 out of 2 draw structure ... → draw structure ... → draw structure ... (hoch2ch2ch2ch2)2co intermediate final product
A 50.0 −mL sample of 1.50×10−2 M Na2SO4(aq) is added to 50.0 mL of 1.28×10−2 M Ca(NO3)2(aq). What percentage of the Ca2+ remains unprecipitated?
To determine the percentage of Ca2+ that remains unprecipitated, calculate the moles of Ca2+ and SO4^2- and use the limiting reagent to find the remaining Ca2+. Finally, use this value to calculate the percentage.
Explanation:To determine the percentage of Ca2+ that remains unprecipitated, we first need to calculate the moles of Ca2+ and SO42- in the solution.
The moles of Ca2+ can be calculated using the formula Molarity (M) = Moles (mol) / Volume (L). Once the moles of Ca2+ and SO42- are known, we can determine which ion is the limiting reagent and calculate how much of the other ion remains unprecipitated.
The formula for the percentage of the Ca2+ that remains unprecipitated is: (Moles of Ca2+ that remains unprecipitated / Initial moles of Ca2+) x 100%.
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which element has the greatest atomic radius.
As
N
P
Sb
Answer : 'Sb' is the element which has the greatest atomic radius.
Explanation :
The general trend of the atomic radium of the element is that,
As we are going from left to right in a periodic table the atomic radius of the elements decreases and as we are going from top to bottom in a periodic table the atomic radius of the elements increases.
The given elements are the group 15 elements in which the 'Sb' is the element which has the greatest atomic radius as compared to N, P and As because as we are going from top to bottom in group 15 the the atomic radius of the elements increases that means the number of energy shells increases.
Hence, 'Sb' is the element which has the greatest atomic radius.
A first-order reaction has a rate constant of 0.33 min-1. it takes __________ min for the reactant concentration to decrease from 0.13 m to 0.088 m
The time taken for a first-order reaction's reactant to decrease from 0.13M to 0.088M can be calculated using the formula ln([A]start / [A]finish) = kt. By substituting the provided values into the formula and solving for t, we can get the precise duration.
Explanation:A first-order reaction relies on the concentration of only one reactant. The rate at which this reaction proceeds is directly proportional to this reactant's concentration. The reaction mentioned in this question has its rate constant (k) as 0.33 min-1.
One key formula used to quantify the reaction rate is ln([A]start / [A]finish) = kt. In this formula, [A]start and [A]finish represent the concentration of the reactant at the beginning and end of the period, and t represents the time taken for the reaction.
Substituting the given values into the formula gives us ln(0.13 / 0.088) = 0.33t. Solving this equation for t the time taken to decrease from 0.13M to 0.088M.
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Write a net ionic equation for the reaction that occurs when aqueous solutions of hypochlorous acid and sodium hydroxide are combined.
The net ionic equation for the reaction occurs when aqueous solutions of hypochlorous acid and sodium hydroxide are combined is:
[tex]\mathbf{HClO_{(aq)} + OH^-_{(aq)} \to ClO^-_{(aq)} + H_2O_{(l)}}[/tex]
An Oxidation-reduction reaction is a reaction in which the oxidation states of an atom is being transformed from one state to the other.
In an oxidation-reduction or redox reaction, reacting electrons are shifted and transferred from one reacting species to another.
The net ionic equation for the reaction occurs when aqueous solutions of hypochlorous acid and sodium hydroxide are combined is determined as follow:
The complete Ionic equation is:
[tex]\mathbf{HClO_{(aq)} + NaOH_{(aq)} \to NaClO_{(aq)} + H_2O_{(l)}}[/tex]
HClO is unionized in the ionic reaction since it is a weak acid.∴
[tex]\mathbf{HClO_{(aq)} + Na^+_{(aq)} + OH^-_{(aq)} \to Na^+{(aq)} + ClO^-_{(aq)} + H_2O_{(l)}}[/tex]
The net Ionic Equation is:
[tex]\mathbf{HClO_{(aq)} + OH^-_{(aq)} \to ClO^-_{(aq)} + H_2O_{(l)}}[/tex]
We can therefore conclude that the net Ionic Equation is [tex]\mathbf{HClO_{(aq)} + OH^-_{(aq)} \to ClO^-_{(aq)} + H_2O_{(l)}}[/tex]
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Final answer:
The net ionic equation for the reaction between hypochlorous acid (HOCl) and sodium hydroxide (NaOH) is HOCl (aq) + OH- (aq) -> OCl- (aq) + H2O (l). This neutralization reaction forms sodium hypochlorite and water, with sodium ions being spectator ions.
Explanation:
The net ionic equation for the reaction that occurs when aqueous solutions of hypochlorous acid (HOCl) and sodium hydroxide (NaOH) are combined can be written following the principles of a double displacement reaction, which is a type of neutralization reaction. Despite the information provided referring to the reaction of hydrochloric acid (HCl) with NaOH, the question asks about hypochlorous acid specifically. Thus, the reaction between HOCl and NaOH will result in the formation of sodium hypochlorite (NaOCl) and water (H2O), not HCl and NaOH.
Here is the net ionic equation for the HOCl and NaOH reaction:
HOCl (aq) + OH- (aq) → OCl- (aq) + H2O (l)
In this reaction, the OCl- is the conjugate base of hypochlorous acid, and the hydroxide ion (OH-) comes from the sodium hydroxide. The H+ from the acid and the OH- from the base combine to form water, leaving the OCl- and Na+ ions in solution. As Na+ is a spectator ion, it does not appear in the net ionic equation.
For h2o2(g), find the value of δh∘f. (use appendix c in the textbook.)
Answer : - 136.0 KJ/mol
Explanation : The complete question is attached below; assuming that the bond energies are given as per the question to find out the heat of formation of [tex] H_{2}O_{2}_{(g)} [/tex] we need to draw its lewis dot structure for this reaction;
[tex] H_{2}_{(g)} + O_{2}_{(g)} ----> H_{2}O_{2}_{(g)} [/tex]
[tex] H_{2} [/tex] will have H-H bond and [tex] O_{2} [/tex] will have O=O with 2 pairs of lone electrons on each of O atom.....These are the bonds which are broken
In [tex] H_{2}O_{2}_{(g)} [/tex] has H-O-O-H bonds; Here, O atom again has 2 pairs of lone pairs on each O atom; ....These are bonds which are made
ΔH°f = ∑ {ΔH(bonds broken) - ΔH (bonds made)}
ΔH°f = ∑ { (432 + 494) - [(459 X 2) +142] }
On solving, We get,
ΔH°f = -136.0 KJ/mol
Hence, the heat of formation for [tex] H_{2}O_{2}_{(g)} [/tex] will be -136.0 KJ/mol
Several general characteristics of metabolic reactions or reaction pathways are listed below. sort them into the appropriate metabolic category. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the statements is incorrectly placed.
Metabolism is all chemical reactions that occur in organisms, including those that occur at the cellular level.
Further ExplanationThe three main goals of metabolism are:
Converting food into energy to run cellular processes. Conversion of food / fuel into a constituent of proteins, lipids, nucleic acids and some carbohydrates. Nitrogen waste disposal. The reaction catalyzed by this enzyme allows the organism to grow and multiply, maintain its structure, and respond to its environment.
In general, metabolism has two directional trajectories for organic chemical reactions:
catabolism, which is a reaction that breaks down molecules of organic compounds, such as the breakdown of glucose into pyruvate by cellular respiration;
anabolism, which is a reaction that assembles (synthesis) organic compounds such as proteins, carbohydrates, lipids, and nucleic acids from certain molecules.
Catabolism is a series of metabolic processes that break down large molecules, including breaking down and oxidizing food molecules. The purpose of catabolic reactions is to provide the energy and components needed by anabolic reactions in order to build molecules.
Anabolism is a metabolic pathway that arranges several simple organic compounds into chemical compounds or complex molecules. This process requires outside energy. The energy used in this reaction can be either light energy or chemical energy. The energy, then used to bind these simple compounds into more complex compounds. So, in this process the required energy is not lost, but stored in the form of chemical bonds in the complex compounds formed.
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Grade: College
Subject: Chemistry
keywords: Metabolism, Catabolism, Anabolism.
2.6 g of oxygen gas react with excess hydrogen gas to produce 2.4 g water. What is the percent yield? A. 63% B. 83% C. 160% D. 46%
Answer:
The answer is 83
Explanation:
I took a quiz and 63 was wrong and it was 83
Write the complete electron configuration for an atom of element 3
what kind of element has the greatest tendency to attract electrons?why?
The elements which has the greatest tendency to attract electrons are more electronegative. Elements like halogens, oxygen, nitrogen etc. are the most electronegative elements which easily attracts electrons.
What is electronegativity?The ability of an atomic nucleus to attracts its electrons and the bonded pair of electrons is called electronegativity. From left to right in periodic table electronegativity increases from metals to non-metals.
As the electronegativity increases, ionization energy of elements increases. Elements which are deficient of electrons needs to gain electrons to attain stability. According to octet law, as the valence shell fills 8 electrons the atom becomes stable.
Thus, the elements bonds with other elements to attain electrons for filling their octet. The more electronegative atoms attracts the bonded pair of electrons towards it and acquire a partial negative charge.
Halogens are more electronegative since they have seven valence electrons and thus need only one electron to attain octet. Thereby, there will be more tends to attract one electron. Similarly, oxygen, sulphur, nitrogen etc. are electronegative elements.
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How many liters of water vapor can be produced if 108 grams of methane gas (CH4) are combusted at 312 K and 0.98 atm? Show all of the work used to solve this problem. CH4 (g) + 2O2 (g) yields CO2 (g) + 2H2O (g)
Answer:
176 L liters of water vapor can be produced.
Explanation:
Using the Ideal gas law,
PV = nRT, where P, T, n, R and T stand for pressure, volume, moles, universal gas constant and temperature respectively.
n = m/M, where n, m and M stand for moles, mass and molar mass respectively.
PV = [tex]\frac{mRT}{M}[/tex]
Given ,
T = 312 K
P = 0.98 atm
m = 108 g
M (CH4) = 16.04 g /mol
R = 0.0821 Latm/molK
V = [tex]\frac{mRT}{PM}[/tex]
Plugging the numbers in the Ideal gas law we get,
V = [tex]\frac{(108 g)(0.0821 Latm/molK)(312K)}{(16.04g/mol)(0.98atm)}[/tex]
V = 175.99 L
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Which part of a watershed is at the lowest elevation?
A.
divide
B.
boundary
C.
basin
D.
collection area
In an ecosystem, collection area is a part of a watershed which is at the lowest elevation.
What is an ecosystem?An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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What is steam distillation and why is it a preferred technique to purify high boiling liquids that are water-insoluble?
Steam distillation is a separation process for temperature sensitive materials and it is used for purification of organic compounds.
The water vapor carries small amounts of the vaporized compounds (water and organic molecules) to the condensation flask. This is preferred technique because allows easy separation of the components by decantation or other suitable methods, because product od distilation is a two phase system of water and the organic distillate.
Steam distillation is a technique used to purify high boiling liquids that are water-insoluble. It involves introducing steam to vaporize the compound at a temperature lower than its normal boiling point, making the process efficient and preventing decomposition.
What is Steam Distillation?
Steam distillation is a variation of simple distillation technique that involves the use of steam or water in addition to the material to be distilled. The main purpose of utilizing steam is to facilitate the distillation of compounds that are water-insoluble and have high boiling points. When steam is introduced into the distilling flask, it helps in vaporizing the organic compound at a temperature lower than its normal boiling point. This process is ideal for purifying such substances because it reduces the risk of decomposition, which is often linked with the high temperatures required for distilling high boiling point liquids.
The distillation apparatus setup for this method is similar to that of simple distillation, with slight modifications to introduce steam into the system. There are two primary ways to add the steam: indirectly by connecting to a building's steam line, or directly by boiling water within the distillation flask itself.
Steam distillation is especially beneficial in separating and purifying volatile compounds from non-volatile impurities or substances with very high boiling points without decomposition. This method is not only used in laboratory settings but also has wide applications in industrial processes, such as the extraction of essential oils and the refinement of certain petrochemicals.
If pu perform 10 joules of work lifting a 10-N box from the floor to the shelf how high is the shelf
The work can be calculated by multiplying the force by the amount of movement of an object.
Mathematically it can be represented as:
[tex]W=F\times d[\tex]
F represents force,
W represents work
d represents distance
Here,
W is given as 10 J
d is the height of shell
F is given as 10 N
So,
by putting all the values in the equation, we get:
10=10\times d
So, d=1 m
so the height of shell will be 1 m.
Consider the energy diagram below. xn. mc012-1.jpg Which line indicates a higher reaction rate? A because it has a lower activation energy. B because it has a lower activation energy. A because its mc012-2.jpgGrxn is much lower. B because its mc012-3.jpgGrxn is much lower.
Answer is: B because it has a lower activation energy.
For all chemical reaction some energy is required and that energy is called activation energy (energy that needs to be absorbed for a chemical reaction to start), activation energy for reaction B is lower that for reaction A.
Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst.
Chemical reactions occur faster with a catalyst because they require less activation energy.
Answer:
b
Explanation:
Which of the following expands to fill the container it is in, but can be compressed to a smaller volume when pressure is applied
How is graphite different from other allotropes of carbon?
A. Graphite forms only from carbon atoms, without other atoms mixed in.
B. The carbon atoms in graphite are arranged randomly, without a crystalline
structure.
C. The carbon atoms in graphite are arranged in widely spaced layers.
D. The carbon atoms in graphite are packed extremely densely and tightly.
Answer:
C. The carbon atoms in graphite are arranged in widely spaced layers.
Explanation:
Allotropes are different structural forms of the same element that exist is the same physical state. In other words, they differ in their bonding arrangement.
Carbon has two allotropes: diamond and graphite.
In diamond each C atom is sp3 hybridised and is bonded to 4 other C atoms forming a tetrahedral unit which extends into a crystalline network. In contrast, each C atom in graphite is sp2 hybridised and bonded to 3 other carbon atoms in a crystalline hexagonal layer like structure.
Thus, the carbon atoms in graphite are arranged in widely spaced layers.