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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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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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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Effective segmentation identifies where your customers are in the (fill the blank), and assists your customers in taking the appropriate next step in their (fill the blank).
Effective segmentation identifies where your customers are in the buyer’s journey and assists your customers in taking the appropriate next step in their individual customer journey.
Understanding the different audiences permits you to tailor your messaging and direct your marketing efforts as it should be. target audience segmentation lets you better talk and connect to your clients, allowing you to get the proper message approximately the right product to the right human beings on the proper time.
Demographic, psychographic, behavioral and geographic segmentation are considered the four fundamental varieties of marketplace segmentation, however there also are many other strategies you may use, along with numerous versions at the 4 important kinds.
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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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The density of gold is 19.3 g/cm3. a. What is the volume, in cubic centimeters, of a sample of gold that has a mass of 0.715 kg? b. If this sample of gold is a cube, what is the length of each edge in centimeters?
A measure of how compact matter is is what density means. How much "stuff" is crammed into an area, to put it simply.
What is Density?In science, density is defined as the ratio of an object's mass to volume. Mathematical and scientific density comparisons are done using a formula.
In disciplines, such as physics, the focus is on things and matter and relates the notion to the rules of nature.
It is a calculable and manipulable formula in mathematics. In other disciplines, such as social sciences, density relates with population. The amount of people in a specific land area produces the population density.
Therefore, A measure of how compact matter is is what density means. How much "stuff" is crammed into an area, to put it simply.
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select whihc of the following standard entahlpy of formation values is not zer oat 25 mn ch4 fe cl2 n2
The standard enthalpy of formation for CH4, Fe, and Cl2 are all zero. The standard enthalpy of formation for N2 is not zero, as it is equal to -57.6 kJ/mol.
What is enthalpy?
A thermodynamic system's enthalpy, which is one of its properties, is calculated by adding the system's functional energy to the product of the its pressure and volume. It is a state function that is frequently used in measurements of chemical, biological, as well as physical systems at constant pressure, which the sizable surrounding atmosphere conveniently provides. The pressure-volume term describes the effort needed to create space for the system by displacing it's own surroundings in order to determine its physical dimensions. For solids and liquids under typical conditions, the pressure-volume word is very small, whereas it is only moderately small for gases. Therefore, enthalpy serves as a stand-in for energy throughout chemical systems; enthalpy differences are what are commonly referred to as bond, lattice, and solvation "energies" in chemistry.
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When solutions of strontium chloride and sodium sulfate react, which of the following is a spectator ion? A) strontium ion B) chloride ion C) sodium ion D) sulfate ion E) two of these
When solutions of strontium chloride and sodium sulphate react, two of these is a spectator ion.
So, option E is correct.
What do you mean by spectator ion?
Spectator ions may be either cations (positively-charged ions) or anions (negatively-charged ions). The ion is unchanged on both sides of a chemical equation and does not affect equilibrium. When writing a net ionic equation, spectator ions found in the original equation are ignored. Thus, the total ionic reaction is different from the net chemical reaction.
Spectator Ion Examples:
Consider the reaction between sodium chloride (NaCl) and copper sulfate (CuSO4) in aqueous solution.
2 NaCl (aq) + CuSO4 (aq) → 2 Na+ (aq) + SO42- (aq) + CuCl2 (s)
The ionic form of this reaction is:
2 Na+ (aq) + 2 Cl- (aq) + Cu2+ (aq) + SO42- (aq) → 2 Na+ (aq) + SO42- (aq) + CuCl2 (s)
The sodium ions and sulfate ion are the spectator ions in this reaction. They appear unchanged in both the product and reactant side of the equation. These ions just "spectate" while the other ions form the copper chloride. The spectator ions are canceled out of a reaction when writing the net ionic equation, so the net ionic equation for this example would be:
2 Cl- (aq) + Cu2+ (aq) → CuCl2 (s)
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BONUS: What process does this chemical reaction represent? 6CO2 + 6H2O —> C6H12O6 + 6O2
Can someone help me please!!!!???
Part #1
Answer:
which question do you need assistance with?
Sodium chloride reacts with fluorine gas to produce solid sodium fluoride and chlorine gas.
The Sodium chloride reacts with fluorine gas to produce solid sodium fluoride and chlorine gas is 2Na+F₂→2NAF.
What is Sodium chloride ?
One of the most prevalent minerals on Earth and a crucial nutrient for many animals and plants is sodium chloride (NaCl), also known as salt. Seawater and underground rock formations are two natural sources of sodium chloride.
What is fluorine?
The most reactive element in all of chemistry is fluorine (F), which is also the first member of the halogen family. Both fluorides and fluorides-containing compounds, both organic and inorganic, are referred to by the terms "fluoride" and its ionic form (F-), respectively.
∴2Na+F₂→2NAF
Therefore, Sodium chloride reacts with fluorine gas to produce solid sodium fluoride and chlorine gas is 2Na+F₂→2NAF.
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thermal caused by a rising temperature of the ocean, and water being added by the melting of land-based ice, are two important causes of sea-level rise.
Thermal expansion caused by a rising temperature of the ocean, and water being added by the melting of land-based ice, are causes of sea-level rise.
Temperature is the unit used to describe heat or cold. It illustrates the natural flow of heat energy from a hotter to a cooler body and can be expressed in terms of a variety of arbitrary scales (one at a lower temperature). An iceberg has a much higher total heat energy than a match, despite the fact that a match burns at a much higher temperature. Temperature and a thermodynamic system's energy are not the same thing. In contrast to extensive features like mass or volume, such as temperature is referred to as an intense property—one that is independent of the amount of material being addressed—along with pressure, density, and other similar qualities.
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li2s lewis structure
Multiple Bonds: C4H6
2. Show that this formula is consistent with a Lewis structure with two double bonds
separated by a single bond. Explain/list all steps that would be followed in
constructing the Lewis structure for this molecule.
Lewis formula for C4H6: Since C4H6 is composed up of covalent bonds, the total number of electrons will equal the sum of the electrons in carbon and hydrogen, providing there is no residual charge.
The hydrogen atom has one electron, while the carbon atom has six.
As a result, there will be a total of = (4 6) + (6 1) = 30 electrons.
Steps to draw lewis structure
Find the polyatomic ion or molecule's total number of valence electrons. Add one electron for each negative charge if the compound is an anion. For each positive charge if the substance is a cation, take one electron away.
The least electronegative element other than hydrogen makes up the centre atom. Single bonds join it to the outside atoms.
Fill the outside atoms' octets.
Fill the centre atom's octet.
Form several bonds until the core atom has an octet if you run out of electrons before it does.
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Drag the labels onto the table to indicate when each statement Is true. Labels can be used once, more than once, or not at all. 1. Orange dye moves independently of purple dye. 2. Concentration gradients exist that drive diffusion of both dyes. 3. There is a net movement of orange dye from side A to side B. 4. Purple dye moves only from side B lo side A. 5. There is no net movement of purple dye.
The labels the table to indicate when each statement Is true. Labels can be used once, more than once, or not at all, The orange dye moves independently of the purple dye. 2. Concentration gradients exist that drive diffusion of both dyes. : free water, solute, free water, solute.
In chemistry, attention is the abundance of a constituent divided by way of the total quantity of an aggregate. several types of mathematical descriptions may be prominent: mass concentration, molar concentration, range concentration, and quantity concentration.
it's miles the amount of solute dissolves in one hundred g solvent. If the attention of the answer is 20 %, we understand that there are 20 g solutes in one hundred g solution. instance: 10 g salt and 70 g water are mixed and the solution is ready. find awareness of the answer by means of percentage mass.
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refer to the diagram to the right. the deadweight loss due to a monopoly is represented by the area
Deadweight loss is potential gain that did not go to producer or the Consumer.
As a result of deadweight losscombined surplus (wealth) of the monopoly and the Consumer is less than that obtained by consumer in a competitive market.
In the given figure deadweight loss is shown by area of FHE. That is the option A is correct.
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note- complete question is attached below
Refer to the diagram to the right. The deadweight loss due to a monopoly is represented by the area
A) FHE
B) FQ1Q2E
C) FGE
D) GEH
Which of the following is not a common cost flow assumption used in costing inventory? a. Average cost b. Middle-in, first-out c. Last-in, first-out d. First-in, first-out
Middle-in, first-out is not a common cost flow assumption used in costing inventory.
Explain 3 cost flow assumptions?
Companies utilize the average cost flow assumption to determine the costs associated with terminating inventory, cost of goods sold (COGS), and inventory in storage. Over the course of the accounting period, all items sold from inventory are averaged, and the average cost is then applied to the items.
Know that FIFO, LIFO, and averaging are the three cost flow assumptions that are most common in the US. Recognize the purpose of the LIFO conformity rule and that the existence of this tax rule is a major contributor to the usage of LIFO in the United States.
Therefore, Option B is correct.
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Analyze The IR Spectrum For Camphor And Compare With The Literature Value.
The analysis of the IR Spectrum for Camphor depicts that there are peaks around 1780 cm-1 that show C=O stretching, 3000 cm-1 that shows C-H stretching, 1450 cm-1 and 1375 cm-1 that show CH2 and CH3 stretching, and 1050 cm-1 that shows C-O stretching.
What does IR mean in the spectrum?A popular absorption technique for both qualitative and quantitative evaluations is infrared (IR) spectroscopy. Electromagnetic radiation that can change the rotational and vibrational states of covalent bonds in organic molecules is found in the infrared portion of the spectrum.
The "Tongues" and "Swords" Are The Main Things To Look For In An IR Spectrum.
Is there a broad, rounded peak in the 3400-3200 cm-1 range? There are hydroxyl groups (OH) present.
Is there a strong, abrupt peak in the area between 1850 and 1630 cm-1? That is where carbonyl groups (C=O) appear.
Camphor is a waxy, colorless substance with a potent scent. It is categorized as a cyclic ketone and terpenoid.
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Which statements are true concerning a substance with a high specific heat?
a. An example substance is water.
b. The substance cools down slowly after heating.
c. The substance easily gets hot when heat is applied.
d. An example substance is aluminum metal.
The chemical progressively cools after heating. Another illustration of a substance is water..
What is specific heat, precisely?
The amount of energy required to elevate the temperature of 1 kilogram of a substance by 1 degree Celsius (°C) is known as specific heat. Since water has a higher specific heat than other substances, it requires more energy to raise its temperature.
In plain English, what's really specific heat capacity?
A pure substance's heating value per unit mass is referred to as its heat capacity, or just specific heat. It is represented in terms of J/kgK or, more accurately, J/kg°C and therefore is described as the amount of warmth required to raise the temperature pf 1 kg of a substance by 1 K.
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Which type of change results in the formation of a new
substance?
Chemists have categorized different sorts of modifications in the same way that they have categorized elements and compounds.
What is New substance?
Changes are classified as either physical or chemical changes. Chemists investigate the transformations that matter can go through to learn a lot about the nature of stuff.
Physical changes and chemical changes are the two different types of changes that chemists examine.
A physical change is when a sample of matter experiences a change in some of its qualities but not in its identity. Water vapor is created when liquid water is heated.
Therefore, Chemists have categorized different sorts of modifications in the same way that they have categorized elements and compounds.
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find the boiling points of the six compounds that you will study: o-dichlorobenzene, 2-bromo- 2-methylbutane, benzene, p-xylene, 4-methyl-2-pentanol, and decane. predict their order of elution.
The separation compound using diffrence in boiling point melting point like physical properties.
What is physical properties.
A physical property is the any measurable property that whose value describes the state of a physical in system. Changes in the system's physical properties of can be used to describe its transitions between the momentary of state.
A physical property is a characteristic of the matter that is not associated with in a change in its chemicals composition. Familiar to the examples of physical properties that is include density, color, hardness, melting and boiling points, and the electrical conductivity.
There are mainly two types of physical properties extensive and intensive.
Sol-The separation scheme to used to separate the mixture of based on differences in this physical properties- such as boiling point melting point, solubility in a given solvent these are the three components.
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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
An electrolytic cell is A. is cell in which reactant are continuously supplied to the cell B. a battery C. a cell in which an electric current drives a no spontaneous reaction D. a cell in which of the cell reaction is spontaneous
An electrolytic cell is a cell in which an electric current drives a no spontaneous reaction.
What is electrolytic cell?
Any apparatus in which excess electricity is changed into chemical energy or conversely is an electrolytic cell. Such a cell normally includes two electrodes, which can be metal or electrical conductors, kept apart from one another and in interface with an electrolyte (q.v. ), which is commonly an ionic compound that has been dissolved or fused.
For instance, water can be electrolyzed to create gaseous oxygen and gaseous hydrogen with the use of an electrolytic cell.
Electrical energy is transformed into chemical energy in an electrolytic cell. Electricity is generated in this situation as a result of a spontaneous redox reaction. Electricity must be provided to start the redox reaction because it is not spontaneous.
Therefore, Option C is correct.
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which of the following statements about the nucleus of a typical atom is false? group of answer choices the nucleus contains both protons and neutrons the nucleus repels the electrons which move around it the nucleus contains most of the mass of the atom the nucleus has an overall positive charge
False, Protons and neutrons are both present in the nucleus.
What is the nuclear force?
One of the four fundamental forces of nature, along with gravitational and electromagnetic forces, is the nuclear force. In fact, they are also referred to as strong forces since they are 10 million times more powerful than chemical binding forces. A force known as the nuclear force interacts with the protons and neutrons of atoms. The force that holds protons and neutrons in a nucleus together is known as the nuclear force. Protons and protons, neutrons and neutrons, or neutrons and neutrons can all be affected by this force. The nucleus is held together by this force.
The nucleus is at the center of an atom and accounts for the maximum mass of the atoms, a nucleus contains both protons and neutrons giving it an overall positive charge because the neutrons are of neutral or zero charges. As electrons are negatively charged and are very light in comparison to a proton or neutron, it is considered negligible in front of them. Due to the negative charge of the electron, it is under an attractive force known as the nuclear force from the nucleus, as we know opposite charges attract.
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A 170. 00 g sample of an unidentified compound contains 29. 84 g sodium, 67. 49 g chromium, and 72. 67 g oxygen. Find the empirical formula.
The empirical formula is [tex]N_{a2C_{r2} } O_{7}[/tex].
Solution:
Mass of Na = 29.84 g
Mass of Cr = 67.49 g
Mass of O = 72.67 g
For Na = [tex]\frac{1.297}{1.297}[/tex] = 1
For Cr = [tex]\frac{1.297}{1.297}[/tex] = 1
For O = [tex]\frac{4.542}{1.297}[/tex] = 3.5
The ratio of Na: Cr: O = 1: 1: 3.5
To make the ratio in a whole number we are multiplying the ratio by 2, and we get:
The ratio of Na: Cr: O = 2: 2: 7
Taking the mole ratio as their subscripts.
The empirical formula for the given compound is[tex]N_{a2C_{r2} } O_{7}[/tex].
The empirical formula is the chemical formula of a compound and gives the proportion of elements present in the compound, but not the actual number or arrangement of atoms. This will be the smallest integer ratio of the elements in the compound. Derivation of the number of moles from the mass of each element. Divide the molar amount of each element by the minimum molar amount to get the exponent of the preliminary empirical formula.
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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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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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the diagrams above represent solutes present in two different dilute aqueous solutions before they were mixed. water molecules are not shown. when the solutions were combined, a precipitation reaction took place. which of the diagrams below is the best particle representation of the mixture after the precipitation reaction occurred? responses
We can see from the images attached that a precipitate of silver chloride is formed as shown.
What is a precipitate?We know that a precipitate is a substance that that separates out of the solution as a solid. Thus if we have an aqueous phase reaction in which there is the combination of two of the reactants which are aqueous solutions. However, when the substnaces are mixed, we obtain a product that is solid. This solid product is whet we call the precipitate of the reaction that has just taken place.
As I said the precipitate would tend to separate out of the solution and then when that happens, we can see that the solid would be in a distinct phase from the rest of the solution.
In this case, the mixture of the sliver nitrate and the sodium chloride would produce a silver chloride precipitate that would separate out of the solution.
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Complete the following table for an ideal gas:
PV = nRT is the equation for the ideal gas law, which can be changed to take only one of the other variables into consideration if the other variables are known.
complete question:
Complete the following table for an ideal gas.
a. Complete the first row.
b. Complete the second row.
c. Complete the third row.
d. Complete the fourth row.
Describe Ideal Gas?A number of randomly moving point particles with no interparticle interactions make form an ideal gas, which is a type of theoretical gas. The ideal gas concept is useful since it conforms to the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis.
According to the ideal gas law (PV = nRT), ideal gases' macroscopic properties are connected. The particles of a gas are said to be perfect if they (a) do not interact with one another and (b) take up no space (have no volume).
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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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How do you draw a Lewis diagram for C2H5OCH3 ?
The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure.
What is Lewis structure?It is used to demonstrate how the electrons in a molecule are positioned around particular atoms.
Electrons are shown as "dots" or, in the case of a bond, as a line connecting the two atoms. The octet rule and formal charges must be met in order to achieve the "best" electron configuration.
A Lewis structure is a visual representation of the electron distribution around atoms. The reason for learning to draw Lewis structures is to forecast the amount and type of bonds that may be formed around an atom.
Therefore, The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure.
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