900 mL of water is added to 100 mL of a 0.1 M solution. What is the new concentration?
0.1M
0.001M
0.0001M
0.01M
Answers
Answer:
The new concentration of the solution is;
0.01 M
Explanation:
The question relates to concentration of solution and proportion of mixtures
The given parameters are;
The volume of water added to the 0.1 M solution = 900 mL
The initial volume of the solution to which water was added = 100 mL
Therefore, the total final volume of the solution = 100 mL + 900 mL = 1000 mL = 1 L
The concentration of the solution = 0.1 M
The number of moles present in the solution, 'n', is given as follows;
n = 100 mL/(1000 mL) × 0.1 M = 0.01 moles
Given that no more concentrated solution was added, we have;
The number of moles in the 100 mL solution = The number of moles in the 1,000 mL solution
Therefore, the number of moles in the 1,000 mL (1 L) solution = 0.01 moles
Therefore;
The new concentration of the 1,000 mL (1 L) solution = 0.01 moles/(1,000 mL) = 0.01 moles/(1 L) = 0.01 M (By definition of the molarity of a solution)
The new concentration of the 1,000 mL (1 L) solution = 0.01 M.
D. 0.01 M
Given:
The volume of water added to the 0.1 M solution = 900 mL
The initial volume of the solution to which water was added = 100 mL
So,
The total final volume of the solution = 100 mL + 900 mL = 1000 mL = 1 L
The concentration of the solution = 0.1 M
Firstly we need to find the number of moles which is represented by 'n':
\(n = \frac{100mL}{1000mL}* 0.1 M\\\\n = 0.01 \text{moles}\)
The number of moles in the 100 mL solution = The number of moles in the 1,000 mL solution
Thus,
The number of moles in the 1,000 mL (1 L) solution = 0.01 moles
For calculation of new concentration:
Using Molarity formula:
The new concentration of the 1,000 mL (1 L) solution \(= \frac{0.01\text{ moles}}{1000mL} = \frac{0.01\text{ moles}}{1L} = 0.01 M\)
The new concentration of the 1,000 mL (1 L) solution = 0.01 M.
Thus, the correct option is D.
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Related Questions
Who and when found Neutron?
Answers
I NEED HELP WITH THESE QUESTION PLSSSSS
Answers
Answer:
If you still need help on this:
SECTION 1
1. These organelles are found in the cytoplasm, a viscous liquid found within the cell membrane that houses the organelles and is the location of most of the action happening in a cell.
2. Each part of the cell does not work alone, but rather works together with other organelles to keep the cell alive and maintain homeostasis.
3. The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.
4.Vacuoles might store food or any variety of nutrients a cell might need to survive. They can even store waste products so the rest of the cell is protected from contamination. Eventually, those waste products would be sent out of the cell.
a solution of rubbing alcohol is 78.1 %% (v/v) isopropanol in water. how many milliliters of isopropanol are in a 79.9 ml ml sample of the rubbing alcohol solution?
Answers
The volume of isopropanol in a 79.9 ml sample of the rubbing alcohol solution is 62.4 ml.
Percentage by volume, %(v/v), is a measure of concentration that indicates the volume of solute per 100 volume units of the solution. In other words, the volume percent of a component in the solution is defined as the ratio of the volume of the component to the volume of the solution, expressed as a percentage.
% (v/v) = (volume of solute / volume of solution) x 100
Substitute the given information into the equation.
% (v/v) = 78.1 %
volume of solution = 79.9 ml
78.1 % = (volume of solute / 79.9 ml) x 100
volume of solute / 79.9 ml = 0.781
volume of solute = 62.4019
volume of solute ≅ 62.4 ml
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some nitrogen atoms have seven neutrons and some have eight neutrons. these two forms of nitrogen are group of answer choices ions of each other phases of each other isotopes of each other identical in mass to each other
Answers
Some nitrogen atoms contain seven neutrons, while others contain eight. These two nitrogen types are isomers of one another.
How do isotopes work?Isotopes are variations of a chemical element with an atomic nucleus that contains the same number of protons but a different number of neutrons. Isotopes have different atomic masses even though they share the same element's atomic number and are therefore members of the same family. This implies that while isotopes of the same element have different physical properties, they share the same chemical properties.
Isotopes can be created artificially or naturally. Carbon, for instance, has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14, whereas other elements, like iodine or mercury, have a number of artificially produced isotopes.
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One brand of laundry bleach is an aqueous solution containing 4. 55% sodium hypochlorite (naocl) by mass. What is the molarity of this solution? (assume a density of 1. 02 g/ml. ).
Answers
The mass concentration of sodium hypochlorite (NaOCl) in the aqueous solution is 4.55%, and its molarity is 0.000623 M.
The amount of sodium hypochlorite in 1 liter of the solution, measured in moles, is used to determine the solution's molarity. One liter of the solution has 0.04641 g, or 4.55% of the sodium hypochlorite mass of 1.02 g/mL. The number of moles in 0.04641 g is then determined by using the molar mass of sodium hypochlorite (74.44 g/mol), which is equal to 0.000623 moles.
We can get the molarity by dividing the number of moles of sodium hypochlorite in 1 liter of solution by the number of liters of solution.
1 liter Equals 0.000623 moles molarity
Molarity equals 0.000623 M
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draw the correct organic product for the reaction shown. ignore stereochemistry in the product. the starting material is a 4 carbon chain where carbon 2 is double bonded to an oxygen. this reacts with sodium borohydride followed by an aqueous workup to give the product.
Answers
The organic product of the reaction is a 4 carbon chain with a hydroxyl group (-OH) attached to carbon 2.
The reaction involves the reduction of the double bond between carbon 2 and oxygen in the starting material. Sodium borohydride (NaBH4) is a commonly used reducing agent that can convert aldehydes and ketones to their corresponding alcohols. In this case, the double bond between carbon 2 and oxygen is similar to a ketone functional group.
When sodium borohydride reacts with the starting material, it donates a hydride ion (H-) to the carbon-oxygen double bond. This hydride transfer leads to the formation of a new carbon-oxygen single bond and the conversion of the oxygen atom into a hydroxyl group (-OH). As a result, the product obtained is a 4 carbon chain with a hydroxyl group attached to carbon 2.
In the subsequent aqueous workup, any remaining sodium borohydride and reaction byproducts are removed. This step ensures the isolation of the desired product and the removal of any impurities. It is important to note that the reaction does not affect the stereochemistry, as mentioned in the question.
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10. Un volumen de 1.0 mL de agua de mar contiene casi 4.0 3 10212 g de Au. El volumen total de agua en los océanos es de 1.5 X 1021 L. Calcule la cantidad total de Au (en gramos) existente en el agua de mar y su valor total en dólares (Suponga que el oro tiene un precio de 948 dólares por onza)
Answers
Answer:
eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Explanation:
Explain how the information given below could be used to determine the concentration of an unknown sample.
Concentration (M)
0.20
0.3
0.40
0.50
Absorbances
0.27
0.41
0.55
0.69
Answers
Answer:
See below
Explanation:Plot the known concentrations and adsorbance data. Draw a best fit line through thwe points. When the absorbance of a solution of unknown concentration (but same substance) is determined, find the concentration from the line at that absorption value. See attached graph.
E.g., an sample of the same substance had an absorbance of 0.35. Find that on the x scale and then determine the concentration that would be required to produce that level of absorbance. 0.483M in this case.
Which of these represents the rate of reaction at equilibrium?
The reverse reaction moves faster at equilibrium
The forward and reverse reactions move at the same rate
The forward reaction moves faster at equilibrium
Answers
At equilibrium, the forward and reverse reactions move at the same rate. This means that the rate of the forward reaction is equal to the rate of the reverse reaction.
What is equilibrium?In chemistry, equilibrium refers to a state in which the forward and reverse rates of a chemical reaction are equal, meaning that the concentrations of reactants and products are no longer changing over time. At equilibrium, the rate of the forward reaction is exactly balanced by the rate of the reverse reaction, resulting in a stable system that is often characterized by the specific values of concentration, pressure, or temperature. Equilibrium can be reached in a chemical reaction when the reactants are consumed and converted into products, and the concentration of the reactants and products reach a constant value. At this point, the reaction is said to be at dynamic equilibrium, where the rate of the forward reaction is equal to the rate of the reverse reaction.
Here,
At this point, the concentrations of reactants and products remain constant and there is no further net change in the amounts of these substances. This is known as dynamic equilibrium, and it is a state in which the rate of the forward and reverse reactions are balanced, and the system is in a stable state. Therefore, the answer to your question is that "The forward and reverse reactions move at the same rate" represents the rate of reaction at equilibrium.
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cual de estos ejemplos de refieren a a propiedades generales y cuales se refieren a propiedades específicas
a) El peróxido de hidrógeno se descompone en presencia de luz_________________.
b) En la escala de Mohs, el vidrio es de 6.5 de dureza_________________.
c) Una puntilla expuesta al aire se oxida_________________.
d) El calentamiento de un metal__________________.
e) Las rebanadas de manzana se ponen cafés cuando se exponen al aire_________________.
f) La sustancia es un metal lustroso color blanco plateado_________________.
g) El azufre es de color amarillo_________________.
h) La vaporización del agua_________________.
Answers
Answer:Specific properties of a substance are derived from other intrinsic and extrinsic properties (or intensive and extensive properties) of that substance.
Explanation:
in a titration, 29.79 ml of 0.00285 m ba(oh)2 neutralized 16.6 ml of hcl solution. what is the molarity of the hcl solution? answer in units of m.
Answers
The molarity of the HCl solution is 2.559 M.
To determine the molarity of the HCl solution, we need to use the balanced chemical equation and stoichiometry of the reaction between Ba(OH)₂ and HCl. The balanced equation for the reaction is:
2HCl + Ba(OH)₂ → BaCl₂ + 2H₂O
Given:
Volume of Ba(OH)₂ solution = 29.79 ml
Molarity of Ba(OH)₂ solution = 0.00285 M
Volume of HCl solution = 16.6 ml
First, let's calculate the number of moles of Ba(OH)₂ used in the reaction:
Moles of Ba(OH)₂ = Molarity x Volume
= 0.00285 M x 29.79 ml
= 0.0849265 mol
From the balanced equation, we can see that the stoichiometric ratio between HCl and Ba(OH)₂ is 2:1. Therefore, the number of moles of HCl used in the reaction is half the number of moles of Ba(OH)₂:
Moles of HCl = 0.0849265 mol / 2
= 0.04246325 mol
Next, let's calculate the molarity of the HCl solution:
Molarity of HCl = Moles / Volume (in liters)
= 0.04246325 mol / 0.0166 L
≈ 2.559 M
Therefore, the molarity of the HCl solution is approximately 2.559 M.
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is there DNA in the stucture of prokryotic
Answers
Answer:
i hope this helped
They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid. Prokaryotic organisms have varying cell shapes.
Explanation:
Answer:
Explanation:
The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments.
What geographic obstacle causes water to condense in an air mass as the air mass moves? Explain your answer.
A. Forests
B.oceans
C.prairies
D.mountains
Answers
Answer:
Mountains
Explanation:
Mountains are colder than the lower elevations. When humid air enters a cooler region, the saturated air begins to cool and this reduces the ability of the air to maintain the evaporated water is the gas state. Molecules of water have reduced enerfy at the cooler temperatures. They will slow down and coalesce with other water molecules to form small droplets of water. The atmoshere cannot hold these heaevier droplets and they begin to fall (i.e., rain).
One migh ask why does the air temperature drop at higher altitudes? Heat rises, so why shouldn't it be warmer on top a mountain, compared to the valley. The reason is that the atmosphere becomes less dense the further from Earth's center on gets. This less dense air has a lower water saturation point, so it rains.
A 60kg bucyclist going 2 m/s increased his output by 1800 j .what was his final velocity
Answers
Answer:
8
Explanation:
trust
Consider X driving a car in the morning and works at medical diagnosis in the afternoon. Following his work schedules, which model you used for the two activity of X? Explain with the logic in terms of machine learning.
Answers
The model used for the two activities of X, driving a car in the morning and working at medical diagnosis in the afternoon, is likely a hybrid model combining supervised and unsupervised learning techniques.
Supervised learning is a machine learning technique where a model is trained using labeled data to make predictions or classify new instances. In the context of driving a car, supervised learning can be used to train a model on labeled data such as images or sensor inputs to recognize objects, detect traffic signs, or make decisions based on road conditions.
On the other hand, medical diagnosis involves analyzing patient data to identify diseases or conditions. This task often involves a combination of supervised and unsupervised learning. Supervised learning algorithms can be trained on labeled medical data to classify diseases or predict patient outcomes. Unsupervised learning techniques such as clustering or anomaly detection can be used to discover patterns, identify outliers, or group patients based on similar characteristics.
A hybrid model that combines supervised learning for specific tasks like object recognition in driving and a combination of supervised and unsupervised learning for medical diagnosis can provide a comprehensive approach to address the different requirements of each activity.
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A 0.200 M NaOH solution was used to titrate a 18.25 mL HE
solution. The endpoint was reached after 31.20 mL of titrant
were added. Find the molar concentration of the original HF
solution.
Answers
Answer:
M₂ = 0.34 M
Explanation:
Given data:
Molarity of NaOH =M₁ = 0.200 M
Volume of HF =V₂= 18.25 mL
Volume of NaOH added = V₁ = 31.20 mL
Molarity of HF solution = M₂ = ?
Solution:
M₁V₁ = M₂V₂
by putting values,
0.200 M × 31.20 mL = M₂ × 18.25 mL
M₂ = 0.200 M × 31.20 mL / 18.25 mL
M₂ = 6.24 M.mL / 18.25 mL
M₂ = 0.34 M
What would be the correct answers
Answers
Answer:
A chemical bond is formed and energy is absorbed I do believe
Explanation:
The balanced chemical equation for the reaction between sodium chloride and silver nitrate is: NaCl(aq) AgNO3(aq) AgCl(s) NaNO3(aq) We can interpret this to mean: ... 1 mole of sodium chloride and moles of silver nitrate React to produce ... moles of silver chloride and moles of sodium nitrate
Answers
Answer:
1 mole of NaCl reacts with 1 mole of AgNO₃ to produce 1 mole of AgCl and 1 mole of NaNO₃
Explanation:
The given reaction is a double decomposition (metathesis) reaction. A reaction in which the products are formed by the exchange of the ions present in the two reactants. NaCL and AgNO₃ exchange ions to form AgCl, which precipitates and NaNO₃.
The balanced equation for reaction is given below;
NaCl(aq) + AgNO₃(aq) ----> AgCl(s) + NaNO₃(aq)
In the reaction above, the mole ratio of the reactants to products is 1 : 1 ---> 1 : 1
This means that 1 mole of NaCl reacts with 1 mole of AgNO₃ to produce 1 mole of AgCl and 1 mole of NaNO₃.
Given the molar mass of the compounds above;
NaCl = 58.5 g/mol; AgNO₃ = 170 g/mol; AgCl = 143.5 g/mol; NaNO₃ = 85 g/mol
Therefore, 58.5 g of NaCl reacts with 170 g of AgNO₃ to produce 143.5 g of AgCl and 85 g of NaNO₃
A person drops two objects from the same height. One object weighs 15 N,
and the other weighs 10 N. How does the mass of the objects relate to the
force of gravity on them?
A. The 10 N object has the same mass as the 15 N object.
B. The 10 N object has more mass than the 15 N object.
O C. The 15 N object has twice the mass of the 10 N object.
O D. The 15 N object has more mass than the 10 N object.
SUBMIT
Im
Answers
Answer:
d. because the 15 newton object has more mass because 10 is less than 15
At a particular pressure and temperature, nitrogen gas effuses at the rate of 82 ml/s. using the same apparatus at the same temperature and pressure, at what rate will nitrogen dioxide effuse?
Answers
The rate at which the nitrogen dioxide, NO₂ will effuse is 64 mL/s
Graham's law of diffusionThis states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass i.e
R ∝ 1/ √M
R₁/R₂ = √(M₂/M₁)
Where
R₁ and R₂ are the rates of each gasM₁ and M₂ are the molar mass of each gasHow to determine the rate at which nitrogen dioxide, NO₂ will deffuseRate of N₂ (R₁) = 82 mL/sMolar mass of N₂ (M₁) = 28 g/mol Molar mass of NO₂ (M₂) = 46 g/molRate of NO₂ (R₂) =?Applying the Graham's law of diffusion equation, we have:
R₁/R₂ = √(M₂/M₁)
82 / R₂ = √(46 / 28)
Cross multiply
82 = R₂√(46 / 28)
Divide both sides by √(46 / 28)
R₂ = 82 /√(46 / 28)
R₂ = 64 mL/s
Thus, nitrogen dioxide, NO₂ will effuse at 64 mL/s
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Seth is making a slideshow about precious metals for a school project. He learns that gold (Au), silver (Ag), and copper (Cu) are often used in jewelry and coins. Seth also learns that they are all transition metals. He wants to explain the properties of these metals to his classmates. Which statement should Seth include in his slideshow?
Answers
Answer:
This question is incomplete without the presence of options which are below
A. These metals have very low melting points.
B. Gold, silver, and copper are highly reactive.
C. These metals resist heat and are less reactive than group 1 and 2 metals.
D. Gold, silver, and copper have very different physical and chemical properties.
The correct option is C
Explanation:
Generally in the periodic table, transition metals (found in the d-block in the periodic table) are less reactive than the alkali metals (group 1 elements) and alkali earth metals (group 2 elements). Hence, they resist heat and thus corrosion. They also have high melting points. It is for these reasons gold, silver and copper and copper are comfortably used in jewelry and coin.
Using highly reactive metals in jewelry and coin will make them react with sweat or rain when the person is beaten by the rain. And could even cause a potential skin/body hazard when worn in a highly heated environment like the kitchen.
Answer:
The correct answer is C.
Explanation:
I'm taking the test on it and I need points lol
determine the formal charge on nitrogen in the nitrite ion (no2-).
Answers
The formal charge on nitrogen in the nitrite ion (NO2-) is +1.
What is nitrite ion's formal charge?To determine the formal charge on an atom, we compare the number of valence electrons it should have (based on its position in the periodic table) with the number of electrons assigned to it in the Lewis structure. In the case of the nitrite ion (NO2-), the Lewis structure shows that nitrogen (N) is bonded to two oxygen (O) atoms and has one lone pair of electrons.
Nitrogen has a valence electron configuration of 5. In the nitrite ion, each oxygen contributes 6 electrons (since oxygen has 6 valence electrons) and the overall charge of the ion is -1.
By applying the formula for formal charge, which is the valence electrons minus the non-bonding electrons minus half of the bonding electrons, we can calculate the formal charge on nitrogen.
Formal charge = 5 - 2 - (6/2) = +1
Hence, the formal charge on nitrogen in the nitrite ion is +1.
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A compound is 53.31% C,53.31% C, 11.18% H,11.18% H, and 35.51% O35.51% O by mass. What is its empirical formula
Answers
The correct empirical formula of the compound is C₂H5 O.
Thus, The definition of an empirical formula for a compound is one that displays the ratio of the components present in the complex but not the precise number of atoms in the molecule. Subscripts are used next to the element symbols to indicate the ratios.
The empirical formula is frequently referred to as the simplest chemical formula. By applying subscripts after the element symbols, it calculates the smallest whole number ratio of the elements in a compound.
There are instances where the empirical formula and the molecular formula, which specifies the precise number of atoms in a molecule, are identical.
Thus, The correct empirical formula of the compound is C₂H5 O.
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HELP PLEASE!
1) What are the harmful effects that global warming can lead to?
2) How can we slow down global warming?
Answers
Answer:
1. Carbon dioxide, increase of green house gas
2. Stop deforestation, cut down amount of cars on the road (encourage public to take public transport), reduce the amount of time u on the air-conditioning
What is 1.0 x 10^4 L in nL?
Answers
Answer:
= 10000000000000 Nanoliters
Explanation:
1.0 x (10^4) L =
10 000 L
10 000L converted into Nanoliters
= 10000000000000 Nanoliters
Hope this helps
K (s) + Br2 (g) → KBr (s) If 35 liters of Br2 are reacted at STP, how many grams of KBr will be produced?
Answers
According to the chemical formula: Potasium (s) + Br2(g) KBr(s), 383.18 grams of KBr will be created.
356 grammes of KBr can be converted into how many grammes of kcl?Purchase stock geometry starting at 356g of KBR times. A mole of Kbr is equal to 119 g Kbr multiplied by two. Alright, one mole of KCL for two modes of Kbr times 74.55g Casey Albert. Hence, K C L mass. That was too 223 g KCL here.
We must first balance the chemical equation to ascertain the reaction's stoichiometry in order to answer this problem:
2K(s) + Br2(g) → 2KBr(s)
The ideal petrol law can be used to determine how many moles of Br2 are reacted in 35 litres of Br2 at STP: PV = nRT
where P = 1 atm (at STP), V = 35 L, n = ?, R = 0.0821 L·atm/(mol·K), and T = 273 K.
Solving for n, we get:
n = PV/RT = (1 atm)(35 L)/(0.0821 L·atm/(mol·K))(273 K) = 1.61 mol
As a result, 3.22 mol of K and 1.61 mol of Br2 react (since 2 moles of K reacts with 1 mole of Br2). The molar mass of KBr (119 g/mol) can be used to compute the mass of KBr generated.
mass of KBr = (3.22 mol KBr) x (119 g/mol KBr) = 383.18 g
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The elementary reaction_.
A)converts reactants to products in a single step
B )has only elements as reactants
C )has only elements as products
D) never needs a catalyst
Answers
Answer:
Explanation:
TOMMY (persistently but a little intimidated by the crowd) It's always that way, in every story I ever read about a ship landing from outer space. —The Monsters Are Due on Maple Street, Rod Serling What scientific fact is Tommy’s theory based on? Meteors can do some crazy things. Spaceships often land on Earth. Technology makes space travel possible. Meteors can move people from planet to planet.
Answers
Answer:
Technology makes space travel possible.
Explanation:
bc the guy above me is wrong I had to guess and I got it right
Answer:
Technology makes space travel possible.
Explanation:
got it right on edge
what is a solution of a homogeneous mixture of one or more solutes dissolved in a solvent
Answers
A homogenous mixture of one or more solutes that have been dissolved in a solvent is known as a solution. Keep in mind that the substance that is present in the highest amount is the solvent.
In a homogenous mixture, what is the solution?
Solutions are homogenous solutions made up of at least two different compounds, referred to as the solute and solvent. The thing that dissolves is called the solute. The emulsifying agent is the solvent. It is impossible to tell the difference between the solvent and the solute when looking at a solution. A solution is a specific kind of homogenous mixture made up of two or more different substances. A mixed type with a homogeneous composition is called a homogeneous mixture. This indicates that it is difficult to separate the chemicals from one another.
The composition and features of homogeneous solutions are constant. Several examples include a cup of coffee, fragrance, cough syrup, a saltwater or sugar water solution, etc.
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Explain why butter and graphite have different melting points?
Answers
Answer:
Differences in melting points between graphite and butter is how their atoms are fixed structurally. Graphite consists of carbon atoms that have covalent bonding with a compact hexagonal arrangement that gives a lot of stability to the compound and makes its melting point elevated to approximately 3500oC.
The allotropes of carbon are diamond and graphite. The allotropes can have same or different physical or chemical properties. Therefore, differences in melting points between graphite and butter is due difference in structure.
What are allotropy?Allotropy is a property by which an element exist in more than one form. The different forms of element are called allotropes.
The features of graphite are :
1.Graphite form strong covalent bonds.
2. Graphite has delocalized electrons but they don't have metallic bonding.
3. There are total four electrons per carbon but only three electrons are available for covalent bond. One electron per carbon is responsible for delocalization.
4. Graphite forms a giant structures.
Graphite consists of carbon atoms that have covalent bonding with a compact hexagonal arrangement that gives a lot of stability to the compound and makes its melting point elevated.
Therefore, differences in melting points between graphite and butter is due difference in structure.
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