Answer:
Covalent bond.
Explanation:
how is the HFusion used to calculate the mass of solid that 1kJ of energy will melt?
The equation to use Hfusion to calculate the energy needed to melt a mass of solid is Grams solid × mol/g × H fusion
what is Hfusion?
The heat of fusion is the amount of heat required to turn 1 g of solid into a liquid without causing a change in temperature.
1Kg×1/H fusion ×g/mol solid
Numerous everyday household products have been produced using the heat of fusion technique, which has numerous other uses. Melting ice into water is the most typical application of the heat of fusion. Manufacturing is where you'll find the great majority of instances of heat of fusion in use. The following examples have been in use for many centuries and are still refined today. Heat of fusion is a necessary step in the production of things such as coins, glass, forged metal, and household goods made from blow-molded plastic.
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Balance the reaction for the combustion of heptane:
?C7H16+?O2??CO2+?H2O
Enter the four coefficients in order, separated by commas (e.g., 1,2,3,4), where 1 indicates the absence of a coefficient.
The balanced chemical equation for the combustion reaction of heptane is:
[tex]C_7H_16+11O_2\longrightarrow 7CO_2+8H_2O[/tex]
What is the balanced chemical equation?The chemical equation in which the number of atoms of each type of element is equal on the reactant, as well as the product side of the equation, is known as a balanced chemical equation.
From the law of conservation of mass, the total mass of the elements on either side of the equation must be equal in a balanced chemical equation.
Given the combustion reaction of heptane can be represented as:
[tex]C_7H_16+11O_2\longrightarrow 7CO_2+8H_2O[/tex]
Therefore, the coefficients required to balance the chemical equation are 1, 11, 7, and 8.
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If an element has an atomic number of 15 then (a) the atomic mass must also be 15 (b) the atom has 15 electrons (c) there are 7 electrons in the outermost shell (d) the atom has 15 neutrons (e) the atom must have only one orbital
Answer:
if an element has atomic number of 15 then the atom has 15 electrons also.
Option (b)
Explanation:
remember the atomic number of an element is also the number of protons of that element, we know that protons have a positive charge, neutrons have no charge and electrons have a negative charge.
we also know that an element is atomically neutral, meaning it overall has no charge, this is because the positive proton attracts a negative electron and hence their charges cancel off.
this is why in all elements, the atomic number(proton number) will always be equal to the electron number.
Note the neutron number cannot be predicted this way, as far as I know, the neutron purpose is mainly to add Mass to the atom so that it can be more stable, though often times the neutron number is similar to the proton number also. You're not required to learn off atomic masses as far as I know because it will be given to you in the exams
To which of the following half-reactions must 2 electrons appear as products in order to balance the equation?
H2 + 2OH- → 2H2O
H2O + PbO → PbO2 + 2H+
The correct option is ,H2 + 2OH- → 2H2O .
What is an electron example?Electrons are the lowest of the elements that constitute a molecule, and thus hold a negative charge. In a neutral atom, there are an equal number of ions and neutrons. One proton and one hydrogen are all that the hydrogen atom has. From the other hand, the uranium atom possesses 92 protons, which means 92 electrons.
Briefing :
Now we have introduced more hydrogen, so we need to balance hydrogen on the left side in acidic solution, we get
[tex]2H^{+} +H_{2} O_{2}[/tex] → [tex]2H_{2} O[/tex]
Now all the atoms are balanced but charge is not balanced. We see that the left side there are two positive charge. So, we balance the charge by adding two negative charge on the left side in the reaction, we get
[tex]2e^{-} +2H^{+} +H_{2} O_{2}[/tex] → [tex]2H_{2} O[/tex]
Therefore, the correct option is,
[tex]2e^{-} +2H^{+} +H_{2} O_{2}[/tex] → [tex]2H_{2} O[/tex]
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(a) construct the d-orbital energy diagram of an octahedral complex, w(co)6.
The octahedral splitting diagram of the complex has been shown in the image attached to this answer.
What is the octahedral splitting diagram?We know that if a complex is said to posses the octahedral geometry, it means that the crystal field splitting of the complex is due to the presence of six ligands which acts as point charges.
The octahedral splitting is common in the ions or the transition metal atoms that have a [tex]d^6[/tex] configuration. In the case of tungsten metal here, there are six electrons as we can see from the electron configuration of the atom; [Xe] 6s² 4f¹⁴ 5d⁴.
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a 192.0 ml solution of 0.114 m mgcl2 reacts with a 31.74 ml solution of 0.613 m naoh to produce mg(oh)2 and nacl.
The answer is 87%.
Solution:
Number of moles of MgCl2 = Volume* Molarity
nMgCl2 = 0.114*0.192= 0.021888 moles
Similarly, nNaOH = 0.02564*0.613= 0.015 moles
Now, according to the reaction, 1 mole of MgCl2 will react with 2 moles of NaOH to produce 1 mole of Mg(OH)2 and 2 moles of NaCl
Thus 0.021888 moles of MgCl2 will react with 0.021888*2 = 0.043776 moles of NaOH which is less than 0.015.
Hence NaOH will be the limiting reagent and will get totally consumed.
Now, according to the equation, 2 moles of NaOH corresponds to 1 mole of Mg(OH)2.
Thus the number of moles of Mg(OH)2 actually produced in the reaction is 0.015/2 = 0.007 moles
Mass of Mg(OH)2 that should have been produced produced = 0.007*58 = 0.406 gm
But actual mass-produced = 0.357 gm
Yield percent = (0.357*100)/0.406 = 87%
Aqueous solutions of magnesium chloride and sodium hydroxide react to form solid magnesium hydroxide and aqueous sodium chloride. This is a neutralization reaction, also called a double displacement reaction. This is a neutralization because you added the base magnesium hydroxide to the acid HCl. The products are salt and water.
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If a liquid is sealed in a container, kept at a constant temperature, how does vapor pressure change over time?.
If a liquid is sealed in a container and kept at constant temperature, how does its vapor pressure change over time?
a. It continues to steadily increase.
b. It increases at first, then remains constant.
c. It increases at first, then decreases.
d. It continues to steadily decrease.
Answer
The vapor pressure of the container sealed with liquid will increase first and then it will remain constant when kept at constant temperature.
Explanation
The vapor pressure in the container containing liquid will increase at first then remain constant. This trend of vapor pressure follows because pressure and vapor is generated by heat. Since the heat container is constant as it is kept at a constant temperature the pressure changes accordingly to the temperature and will remain there unless it is released.
Hence, the vapor pressure of the container containing liquid which is kept at constant temperature increases and remain constant.
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identify the sugars in amygdalin.
Answer:
It consist of glucose. To be specific, it had two molecules of glucose known as benzaldehyde and hydrocyanic acid.
Explanation:
Amygdalin is a white, bitter-tasting, water-soluble, glyosidic power, C20H27NO11, usually obtained from bitter almond seeds and the leaves of plants of the genus Prunus and related genera: used chiefly in medicine as an expectorant.
Now let's go onto the others.
Glucose is a sugar, C6H12O6, having several optically different forms, the common dextrorotatory form (dextroglucose, or -glucose) occurring in many fruits, animal tissues and fluids, etc., and having a sweetness about one half that of ordinary sugar, and the rare levorotatory from (laevoglucose, or -glucose) not naturally occurring.
The benzaldehyde molecule contains a total of 14 atom(s). There are 6 Hydrogen atom(s), 7 Carbon atom(s) and 1 Oxygen atom(s) A chemical formula of benzaldehyde can therefore be written as:C7H6O.
A solution of hydrogen cyanide in water, represented as HCN, is called hydrocyanic acid. Hydrogen cyanide is a colorless, poisonous bas, HCN, having a bitter almond like odor: in aqueous solution it forms hydrocyanic acid.
Thank you,
Eddie
why does a animal cell make it a animal cell under a microscope???
Well, animal cells are unique. Like human cells, animal cells serve as the building blocks for the Animalia kingdom along with the organisms within it. Animal cells absorb nutrients and provide energy, form a structure for the organism, and generally help an animal function correctly and move. They can replicate themselves as they contain all the hereditary material of a living organism. But overall, a animal cell is a type of cell known as a eukaryotic cell in which it lacks a actual cell wall along with a genuine, membrane-bound nucleus that consists of other cellular organelles too.
The animal cell consists of the nucleus, cell membrane, mitochondria and cytoplasm -- these 4 cell components can also be found in plant cells.
More information:
Well, “animal cells” are legitimately cells from an animal. They are cells that belong to the same class as "animals," but each one of them may be unique and serve a distinct purpose. The absence of a cell wall and chloroplasts makes them easily distinguishable from plant cells.
animal cell is a really big range of cells, so I’m going to share a few common ones here:
(1) Stem cells are crucial cells that can develop into many types of cells in the human body. They are located in the umbilical cord, where stem cells begin to differentiate into many types of cells with various roles in the developing baby' body.
(2) Red blood cells are a unique class of cells that lack a nucleus, making them targets for the spleen's destruction and breakdown into iron and bile pigments. It has hemoglobin, which binds to oxygen to create oxyhemoglobin, which then carries oxygen to every cell in the body.
(3) White blood cells: These immune system-supporting cells work to protect the body when foreign antigens are ingested. Phagocytes and lymphocytes are the two primary subgroups of white blood cells. While lymphocytes create antibodies and interact with other immune cells, phagocytes primarily ingest foreign particles through a process known as phagocytosis.
(4) Muscle cells are, of all, what allow animals to move about. They contract and relax with the bones to let the bodily component to move. Given that a body is made up of several muscle cells, this truly covers a large spectrum of cells.
Thanks.
in order to secure reliable sources of rubber, tin, rice, scrap iron and liquid fuel, japan decided it must
In order to secure reliable sources of rubber, tin, rice, scrap iron and liquid fuel, japan decided it must both seize much of southeast asia and attack united states pacific bases in hawaii and elsewhere
When first created, natural rubber, also known as caoutchouc or India rubber, is made of polymers of the organic compound isoprene, along with water and trace amounts of other organic compounds. The top two producers of rubber are Thailand and Indonesia. Elastomers are a category for different types of polyisoprene that are used as natural rubbers. At the moment, rubber is mostly obtained from rubber trees or other sources as latex. Making incisions in the bark and collecting the fluid in vessels is a process known as "tapping," which removes the latex, a sticky, milky colloid. The rubber created from the refined latex is then ready for industrial processing. Latex is allowed to coagulate in the collection cup in major areas.
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which of the following statements is true? responses the exact location of an electron can be determined if we know its energy. the exact location of an electron can be determined if we know its energy. ni has two unpaired electrons in its 3d orbitals. ni has two unpaired electrons in its 3 d orbitals. in the buildup of atoms, electrons occupy the 4f orbitals before the 6s orbitals. in the buildup of atoms, electrons occupy the 4 f orbitals before the 6 s orbitals. an electron in a 2s orbital can have the same n, l, and ml quantum numbers as an electron in a 3s orbital. an electron in a 2 s orbital can have the same n , l , and m l quantum numbers as an electron in a 3 s orbital. only three quantum numbers are needed to uniquely describe an electron. only three quantum numbers are needed to uniquely describe an electron.
The statements that are true are, Ni has 2 unpaired electrons in its 3d orbitals, and in the building up of atoms, electrons occupy the 4f orbitals before the 6s orbitals.
The 3d orbitals of Ni are the five orbitals of the d-subshell, which have the following shapes: 3dxy, 3dxz, 3dyz, 3dx2-y2, and 3dz2. These orbitals are able to hold a maximum of ten electrons, and Ni has eight electrons in its 3d orbitals. Of the eight electrons, two of them are unpaired.
The first unpaired electron is in the 3dxy orbital. This orbital is a degenerate orbital, which means it can hold two electrons with opposite spins. When Ni has two electrons in the 3dxy orbital, one of them will have an up spin and the other will have a down spin, meaning they can occupy the same orbital without having to repel each other.
The second unpaired electron is in the 3dx2-y2 orbital. This orbital is also a degenerate orbital, which means it can hold two electrons with opposite spins. When Ni has two electrons in the 3dx2-y2 orbital, one of them will have an up spin and the other will have a down spin, meaning they can occupy the same orbital without having to repel each other.
In the second statement 4f orbitals are filled before the 6s orbitals due to the fact that the 4f orbitals have lower energy than the 6s orbitals. This means that electrons will fill the 4f orbitals first as they are closer to the nucleus and therefore have lower energy. The 6s orbitals are further away from the nucleus and therefore have higher energy than the 4f orbitals. This means that the electrons will fill the 4f orbitals before they fill the 6s orbitals.
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The leaves of the unhealthy plant are yellow. What substance is missing from them but present in green leaves?.
Answer:
Chlorophyll
Explanation:
im pretty sure
consider the enthalpy of formation for c3h8(g) a. write the balanced chemical equation describing the heat of formation of c3h8(g).
The enthalpy of formation for C₃H₈ is -394,286 kJ/mol.
Definition of enthalpy of formation
Enthalpy of formation also known as the heat of formation and also called standard heat of formation, enthalpy of formation, or standard enthalpy of formation is the amount of heat absorbed or evolved when one mole of a compound is formed from its constituent elements and each substance being in its normal physical state (gas, liquid, or solid).
The balanced chemical equation describing the heat of formation of C₃H₈.
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
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the cataylic triad is typically found in a wide range of enzymes that do hydrolysis draw the curved arrows to show how serine is converted to a better nucleophile
The catalytic triad of serine, glutamic or aspartic acid, and histidine is present in serine esterase's
What is catalytic triad?
A trio of coordinated amino acids known as a catalytic triad can be found inside the active site of certain enzymes. The most typical catalytic triads in enzymes are those in hydrolase and transferase. A typical motif for producing a nucleophilic stains for covalent catalysis is an acid-base-nucleophile triad. A charge-relay network is formed by the residues to polarise as well as activate this same nucleophile, which then attacks the substrate and forms a covalent intermediate that is hydrolyzed to start releasing the product but also regenerate free enzyme. The amino acid serine or cysteine is the nucleophile most frequently, but threonine and even selenocysteine can occur.
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In the next three problems, we will attempt to solve the problem: What is the standard entropy change for the combustion of 1 mole of diamond at room temperature?C (s, diamond) +O2( g)→CO2
For the combustion of 1 mole of diamond at room temperature, the standard entropy change is 6.22 J/K mol.
The reaction is given as :
C (diamond) + O₂ -----> CO₂
At room temperature the value of S° is given as follows :
carbon, C = 2.38 J / Kmol
oxygen, O₂ = 205.2 J/Kmol
carbon dioxide, CO₂ = 213.8 J/Kmol
The standard entropy change is given as :
ΔS° = ∑S° product - ∑ S° reactant
ΔS° = ( 213.8 ) - ( 2.38 + 205.2)
ΔS° = 213.8 - 207.58
ΔS° = 6.22 J / K mol
The standard entropy change for the combustion of 1 mole of diamond at room temperature is 6.22 J / K mol.
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li2s lewis structure
Which of the following types of infiltration techniques does one open up to by posting sensitive personal information and details about one's workplace on social networking sites? Password theft Social engineering Physical threats Phishing Virus infections
Social engineering types of infiltration techniques does one open up to by posting sensitive personal information and details about one's workplace on social networking sites.
What is the which means social engineering?
Social engineering is an assault vector that is predicated closely on human interplay and frequently includes manipulating human beings into breaking regular safety techniques and satisfactory practices to benefit unauthorized get entry to systems, networks or bodily places or for economic benefit.
Is social engineering a cybercrime?
Social engineering is a manipulation approach that exploits human blunders to benefit personal information, get right of entry to, or valuables. In cybercrime, these “human hacking” scams generally tend to trap unsuspecting customers into exposing data, spreading malware infections, or giving get right of entry to constrained systems.
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a chemistry student is given of a clear aqueous solution at . he is told an unknown amount of a certain compound is dissolved in the solution. the student allows the solution to cool to . at that point, the student sees that a precipitate has formed. he transfers the liquid to a clean new beaker and throws away the precipitate. the student then evaporates the water from the liquid in the new beaker under vacuum. it weighs . using
The Solubility cannot be calculated.
Solubility indicates the maximum amount of a substance that can be dissolved in a solvent at a certain temperature. Such a solution is called saturated. Divide the mass of the compound by the mass of the solvent and multiply by 100g to calculate the solubility in g/100g.
The solubility of ionic solutes does not always increase with increasing temperature. In exothermic solution reactions, solubility can decrease with increasing temperature. The number of moles of solute dissolved in a given volume of solution does not represent the solubility of the solution. They dissolve more readily and solubility increases with increasing temperature.
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Describe the orbital diagram of an atom with eight electrons. Explain how this orbital diagram demonstrates Hund's rule.
The orbital diagram of the eight electron atom is shown in the image attached.
What is Hund's rule?The Hund's rule states that the electrons that are found in atom must be filled singly first before pairing can occur. In this case we are dealing with an atom that has a total of eight electrons.
In looking at the orbital diagram, we are going to observe that the five orbitals would first be filed then we would now start to pair the orbitals until we fill in all of the eight electrons as shown in the image attached.
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Answer:
We have an electron that has six electrons, and there are two electrons that singly occupy the 2p orbitals. According to Hund's rule, electrons arise singly in an atom before pairing occurs.
Explanation:
which of the following options correctly describe the products of the reaction between a strong acid and a strong base in aqueous solutions? select all that apply
a. there is no net ionic equation as all species are soluble in water
b. the reaction usually produces an insoluble precipitate
c. the reaction forms a salt and water
d. the net ionic equation is typically given by :
e. H+ + OH- --> H2O
f. the reaction produces H3O and OH- ions
The reaction results in the formation of salt and water, and the net ionic formula is often given by: H+ + OH- --> H2O
Give an illustration of what an ionic equation is:
The electrolyte in aqueous are expressed as dissociated ions in ionic equations, which are chemical equations. Example: 1) Ag+(aq) + Cl-(aq) AgCl >> Salt chloride(aq) + argent nitrate(aq) platinum chloride(s) + salt nitrate(aq) (s) 2) Hydrochloric acid + sodium (s) -> sodium chloride (aq) + hydrogen (g).
How is an ionic formula written?
You first must identify the ion and note its sign and charge before you can determine the formula for an anion. Then, after determining the anion's identity, note its symbol and charges. The two ions should then be combined to create an electrically neutral molecule.
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20.97 during research studies to determine the absolute stereo- chemistry of a bromohydrin, the investigators observed an unexpected skeletal rearrangement.12 provide a plausible mechanism for the forma- tion of epoxide 2 from bromohydrin 1.
The skeletal rearrangement of the forma- tion of epoxide 2 from bromohydrin 1.
Skeletal rearrangement reactions, which contain a exchange of connectivity of the substrate thru cleavage of carbon-carbon, carbon-heteroatom, and heteroatom-heteroatom bonds, have attracted plenty interest as a synthetic method of highly substituted organic.
Intermediate is a 3-membered ring (halonium ion). Halohydrin formation (specifically chlorohydrin and bromohydrin formation) is the end result of the addition of a halogen (Cl or Br--less substituted side) and a hydroxyl institution (greater substituted aspect) across an alkene.
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A ga balloon ha a volume of 90. 0 liter when the temperature i 39 °C and the preure i 740. 0 mmHg. What would it volume be at 15. 0 °C and 780. 0 mmHg?
The volume of gas is 32.84 L.
given that :
Volume V1 = 90 L
Temperature T1 = 39 °C
pressure P1 = 740 mmHg
Volume V2 = ?
Temperature T2 = 15 °C
pressure P2 = 780 mmHg
according to the ideal gas equation we get :
P1 V1 / T1 = P2 V2 / T2
V2 = (P1 V1 T2) / P2 T1
V2 = ( 740 × 90 × 15 ) 780 × 39
V2 = 32.84 L
Thus, A ga balloon ha a volume of 90. 0 liter when the temperature i 39 °C and the pressure i 740. 0 mmHg. it volume be at 15. 0 °C and 780. 0 mmHg is 32.84 L
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A 250-L tank is evacuated and connected to a 50.0-L bulb filled with compressed argon. After they are joined, the pressure in the bulb falls to 2.20 atm. If the temperature remains at 25 °C throughout the process, what was the initial pressure in the 50.0-L bulb?
The initial pressure in the 50.0L bulb is 2.75 atm.
What is Boyle's Law?According to Boyle's law in a constant temperature, the volume of a gas is inversely proportional to its pressure.
V ∝ 1/P
PV = constant.
It is given to us, Initial volume(V) = 250L and Final volume(V') = 50.0 L
Say final pressure is P', that implies initial pressure P = P'- 2.20
Now, according to the concept of Boyle's law, PV = P'V'
⇒P' = PV/V'
⇒P' = (P'-2.20)*250 / 50
⇒P' = 2.75 atm
So, the initial pressure in the 50.0L bulb is 2.75 atm.
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Aqueous silver nitrate reacts with solid copper to form a cupric nitrate solution and silver crystals
I really need help on this
The balance equation is [tex]Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag[/tex]
Balanced equation means that the number of atoms in the reactant side and the number of atoms in the product side is equal.
Let's check whether the given equation is balanced or not.
[tex]Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag[/tex]
Reactant Side Product Side
Cu = 1 Cu = 1
Ag = 2 Ag = 2
N = 2 N = 2
O = 6 O = 6
From the above equation we can say that all the atoms in the product side and reactant side are equal so this is a[tex]Cu + 2AgNO_3 \rightarrow Cu(NO_3)_2 + 2Ag[/tex] balanced chemical equation.
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Question:
Write the balance chemical equation for this statement:
Aqueous silver nitrate reacts with solid copper to form a cupric nitrate solution and silver crystals.
radium-224 has a life-life of 3.66 days. what was the mass of the original sample of radium-224 if 0.0500 g remains after 7.32 days?
Answer: 0.2 g
Explanation:
Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the following percent composition by mass: c: 44. 4 percent; h: 6. 21 percent; s: 39. 5 percent; o: 9. 86 percent. Calculate its empirical formula. What is its molecular formula given that its molar mass is about 162 g?.
The molecular formula of the Allicin is, C₁₈H₃₀S₆O₃ and the empirical formula is C₆H₁₀S₂O
the molecular formula can be calculated as follows:
If a percentage is provided, we will assume that the entire mass is 100 grams.
As a result, each element's mass is equal to the percentage indicated.
C weighs 44.4 g.
H weighs 6.21 g.
S weighs 39.5 g.
O's mass is 9.86 g.
C has a molar mass of 12 g/mole.
H has a molar mass of 1 g/mole.
S has a molar mass of 32 g/mole.
O has a molar mass of 16 g/mole.
first, convert given masses into moles.
Moles of C = mass C = 44.4 g = 3.7 moles
molar mass C 12 g/mole.
Moles of H = mass H = 6.21 g. = 6.21 moles
molar mass 1 g/mole.
Moles of S = mass S = 39.5 g. = 1.23 moles
molar mass 32 g/mole.
Moles of O = mass O = 9.86 g. = 0.62 moles
molar mass 16 g/mole.
then we find the mole ratio by divide each value of moles by the smallest number of moles calculated.
For C = 3.7 moles = 5.96 ≈ 6
0.62 moles
For H = 6.21 moles = 10.01≈ 10
0.62 moles
For S = 1.23 moles = 1.98 ≈ 2
0.62 moles
For O = 0.62 moles = 1
0.62 moles
The ratio of C : H : S : O = 6 : 10 : 2 : 1
The Empirical formula is C₆H₁₀S₂O
The empirical formula weight = 6(12) + 10(1) + 2(32) + 1(16) = 162 gram/eq
Now we have to calculate the molecular formula of the compound.
Formula used :
n= molecular formula = 486 =3
empirical formula 162
Molecular formula = (C₆H₁₀S₂O)₃ =C₁₈H₃₀S₆O₃
Therefore, the molecular of the compound is, C₁₈H₃₀S₆O₃
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Calculate the amount of energy needed to raise the temperature of 260.5 g of aluminum from 0 °C to 125 °C. The molar heat capacity of aluminum is 24.2 J/K•mol.
Taking into account the definition of calorimetry, the amount of energy needed to raise the temperature is 29,191.25 J.
Definition of calorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without changes in its physical state (phase change). In other words, when heat added or removed from a substance causes a temperature change in it without affecting its molecular structure, it is called sensible heat.
The expression that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
Q is the heat exchanged by a body of mass m.c is the specific heat substance.ΔT is the temperature variation.Amount of energy neededIn this case, you know:
Q= ?c= 24.2 J/Kmolm= 260.5 gmolar mass= 27 g/molemoles= m÷ molar mass= 250.5 g÷ 27 g/mole= 9.65 molesΔT= Tfinal - Tinitial= 125°C - 0°C= 125°C= 125°KReplacing in the definition of sensible heat:
Q= 24.2 J/Kmol× 9.65 moles× 125°K
Solving:
Q= 29,191.25 J
Finally, the amount of energy needed is 29,191.25 J.
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Do the figures in this partial periodic table demonstrate the trend in atomic radius, ionic radius, or neither of these? Relate your answer to the structure of atoms across the periodic table
Connect your responses to the atomic structures shown on the periodic table. Ionic distance. This is due to the fact that as you move to the right on the periodic table, the numbers get gradually smaller.
How important is the periodic table ?Its historical use to encourage filling in the gaps left the Mendeleev that led to the discovery of novel, interesting elements with numerous applications in daily life is where its greatest significance resides. Many of the metals and useful substances we now take for given would not have been found without it.
What makes the periodic table so amazing?To sum up, the table is crucial because it is set up to offer a wealth of knowledge on elements and their interactions in a single, convenient reference. Even qualities of metals that are yet to be found can be predicted using the table.
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How does hybridization of the atomic orbitals in the central atom of a molecule help lower the overall energy of the molecule?
The hybridization of the atomic orbitals in the central atom of a molecule lowers the overall energy of the molecule due to the maximization of the orbital overlap in the chemical bond.
What is the hybridization of the atomic orbitals?The hybridization of the atomic orbitals is a process in chemistry associated with the combination of two different atomic orbitals in a hybrid orbital after the formation of a particular molecule.
Therefore, with this data, we can see that the hybridization of the atomic orbitals depends on the formation of molecules.
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a. What is metallic bonding? b. How can the strength of metallic bonding be measured?
Metallic bonding is described as a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons and positively charged metal ions.
The strength of metallic bonding can be measured via the metal's enthalpy of vaporization.
What is the enthalpy of vaporization?
The enthalpy of vaporization is described as the heat required to vaporize a material at constant pressure.
Metallic bonding is often described as an array of positive ions in a sea of electrons in which the metal is held together by the strong forces of attraction between the delocalized electrons and the positive ions.
The properties of metals that are a consequence of metallic bonding include:
Malleability.Ductility.High melting and boiling point.High electrical and thermal conductivity.Metallic lustre.Learn more about metallic bonding at: https://brainly.com/question/20536777
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