draw the line-angle structural formula for cyclopropane
Answers
The line angle structure formula for cyclopropane is C3H6 or (CH2)3 with three methylene groups attached at the corner of a triangle.
The cycloalkane, cyclopropane has the chemical formula (CH2)3, and it is made up of three methylene groups (CH2) that are joined together to create a ring. The structure experiences significant ring strain as a result of the ring's modest size. The structure of cycloprane is depicted in the image attached.
A line-angle formula, also known as a skeletal structure, is even more condensed. In this formula, carbon atoms are implied at the corners and ends of lines, and each carbon atom is assumed to be connected to enough hydrogen atoms to give it four bonds. This is because carbon atom has a valency of four or it is a tetravalent atom.
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Related Questions
what mathematical tools do we use to determine the ratios of elements in a compound?
a. magnesium oxide
b. magnesium metal
c. oxygen
d. all answers are correct
Answers
The correct option is (d) i.e. all answers are correct, To determine the ratios of elements in a compound, we can use several mathematical tools such as:
1. The mole concept and Avogadro's number, which allows us to convert between mass and number of moles of a substance.
2. The chemical formula, which gives the ratio of atoms of each elements in a compound.
3. The law of definite proportions (also known as the law of constant composition), which states that the ratios of elements in a pure compound are always the same, regardless of the source or amount of the compound.
All these tools can be used to determine the ratios of elements in a compound like magnesium oxide (MgO) and magnesium metal (Mg), as well as in any other compounds.
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In your own words define law of conservation of energy
Answers
Answer: Energy cannot be created or destroyed it can only be transformed and used to make other forms of energy.
Explanation:
Use the variational method to obtain an upper limit for the ground state energy of the He atom using as trial function
Answers
However, the variational technique yields all states, but the trial function method does not (unless your trial function space contains the exact excited states).
Variational method: what is it?A mathematical technique called the variational approach is used to roughly compute the energy levels of challenging quantum systems. A solvable system's energies may also be roughly estimated using this technique, and the correctness of the method can then be determined by comparing the approximated and known energies.
E [ | ψ ⟩,⟨ψ |] =⟨ψ|H|ψ⟩−λ(⟨ψ|ψ⟩−1).
To calculate the variation, one uses the formula: E=|H|+|H|||.
Please take note that we regard | and | as independently variable.)
This indicates that the functional is stationary for the following: H|=|.
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What is the percent yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen? 2H^2 + O^2 —-> 2H^2O
Answers
If 4 grams of hydrogen with excess oxygen make 18 grams of water, what is the yield in percentage terms? 2H^2 + O^2 —-> 2H^2O
Is hydrogen a liquid or a gas?Hydrogen is a gas at standard conditions of temperature and pressure, but around -423 degrees Fahrenheit, it condenses into a liquid (minus 253 degrees Celsius).
Where can you find hydrogen?The majority of stars and the sun include it, and the planet Jupiter is primarily made of it. Water has the most hydrogen on Earth. All that can be discovered of it as a gas in the air is less than 1 part per million by volume.
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Draw the lewis structure and identify the three molecular geometrys for CH3SO2H, C(CH2)2 and CH3NCO
Answers
The molecular geometry of CH3NCO is: Linear
The molecular geometry of CH3SO2H is: T-shaped
The molecular geometry of C(CH2)2 is: Linear
Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the bonding between atoms in a molecule as well as any lone pairs of electrons that may occur. Any covalently bound molecule, as well as coordination compounds, can be represented by a Lewis structure. Gilbert N. Lewis, who introduced the Lewis structure in his 1916 paper The Atom and the Molecule, was named after it. Lewis structures expand on the electron dot diagram concept by adding lines between atoms to indicate shared pairs in a chemical bond.
The Lewis structure for CH3SO2H, C(CH2)2 and CH3NCO are:
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A 1.0 liter flask contains 5.0 moles of a gas at 27.0°C. What is the pressure of the gas? [R-.082 L.atm/mol.k]
A) 300 atm
C) 101.3 atm
D) 123 atm
B) 0.41 atm
Answers
The pressure of the gas 123 atm.
How do you find the pressure of a gas?
Pressure is the amount of force a substance applies to another substance per unit of area. The force that the gas applies to the container boundaries is known as the gas's pressure.
Along the designated volume, the gas molecules move at random. They bump into the ground and each other throughout this movement.
The effect of each gas molecule is too small to be felt, let alone seen. However, the gas pressure is determined by the combined impact of all gas molecules
P = nRT / V
Gas constant, R-.082 L.atm/mol.k
here number of moles, n= 5 moles
temperature, T = 27°C = 300.15 kelvin
volume, V = 10 liter
Then values given in the equation P = nRT / V
the pressure of the gas P
= 5*.082*300.15/1
= 1,230.615/10
= 123 atm
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What is the number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen?
Answers
4 moles of ammonia molecules can be made when 6 grams of hydrogen gas reacts with excess nitrogen.
[tex]N_{2}[/tex](g) + 3[tex]H_{2}[/tex](g) → [tex]2NH_{3}[/tex](g)
1 mole of [tex]N_{2}[/tex] reacts with 3 moles of [tex]H_{2}[/tex]
Therefore, 6 moles of [tex]N_{2}[/tex] will react with 18 moles of [tex]H_{2}[/tex]
[tex]H_{2}[/tex] + 6 no. of moles. ( Hydrogen is a limiting reagent).
No. of moles of ammonia are formed when 3 moles of [tex]H_{2}[/tex] will react with excess of [tex]N_{2}[/tex] = 2
No. of moles of ammonia are formed when 6 moles of [tex]H_{2}[/tex] will react with excess of [tex]N_{2}[/tex] = 2/3×6 = 4
Therefore, it is a gaseous equation (all the reactants as well as products are gases).
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An 20.5 g sample of zinc metal has a volume of 5.5 cm3. Calculate the density of zinc.
Answers
Taking into account the definition of density, the density of an 20.5 g sample of zinc metal and a volume of 5.5 cm³ is 3.72 g/cm³
Definition of densityDensity is a scalar magnitude referring to the amount of mass in a certain volume of a substance or an object.
In other words, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
Dnsity of zincIn this case, you know that:
Mass= 20.5 gVolume= 5.5 cm³Replacing in the definition of density:
density= 20.5 g÷ 5.5 cm³
Solving:
density= 3.72 g/cm³
In summary, the density in this case is 3.72 g/cm³
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how can different parts of the sun rotate at different speeds
Answers
Answer:
Because unlike Earth and other solid objects, the entire Sun doesn't rotate at the same rate. Because the Sun is not solid, but is instead a giant ball of gas and plasma, different parts of the Sun spin at different rates. The interior of the Sun does not spin the same way as does its surface.
What are the 4 types of verbal?
Answers
Interpersonal verbal communication, Intrapersonal, small group communication and Public communication are the four types of verbal communication.
You could find it easier to express your ideas, thoughts, feelings, and experiences by using various verbal communication techniques. You can use this to consider your personal strengths. You might describe yourself as tenacious, cooperative, or patient, for instance. It's critical to communicate your strengths, priorities, and expectations to others, especially if you plan to collaborate with them. Team members that are familiar with your working style and skill set may aid in your transition to your new position.
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which substance produces hydrogen ions in aqueous solution
Answers
When a substance is dissolved in water, the solute can either accept or donate protons, which are also known as hydrogen ions. This process is called protonation or deprotonation and the ratio of proton acceptors to donors determines the degree of acidity or alkalinity. In an aqueous solution, the hydrogen ion concentration is determined by a number of factors such as temperature, pressure, and the concentration of other ions present in the solution.
When discussing hydrogen ions in aqueous solution, it is important to understand the concept of pH. pH is a measure of acidity or alkalinity and is expressed on a scale of 0 to 14. A pH value of 7 is neutral, values greater than 7 are alkaline and values less than 7 are acidic. The higher or lower the pH value, the greater or lesser the concentration of hydrogen ions present in the solution.
So, what substance produces hydrogen ions in aqueous solution? The answer is that any water-soluble acid can donate proton ions to the solution, thus increasing the concentration of hydrogen ions. Examples of acids include hydrochloric acid, nitric acid, sulfuric acid and carbonic acid. These substances are often referred to as proton donors as they give off hydrogen ions when dissolved in water.
It should also be noted that some substances can act as both proton acceptors and donors depending on the pH level of the solution. These substances are known as amphiprotic and include common substances such as baking soda and table salt.
Identify one way to improve models of electron dot structure
Answers
Electron dot structures or Lewis dot structures can be improved by adding valence electrons of each atom and then representing them in form of dots.
What are Lewis dot structures?Lewis dot structures are also called as electron dot structures and can be drawn if the molecular formula of a compound is known. It provides information regarding the nature of bond and the position of atoms .
They are also capable of exhibiting the lone pair if any present in a molecule or compound.Lewis defined a base to be an electron pair donor and an acid to be an electron pair acceptor.
They are capable of reflecting electronic structure of elements and even the pairing of electrons . In the diagram, each dot represents an electron while a pair of dots represent a bond between the atoms.
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A 13. 1-g ample of ice at −17. 9°C i mixed with 103. 5 g of water at 73. 0°C. Calculate the final temperature of the mixture auming no heat lo to the urrounding. The heat capacitie of H2O() and H2O(l) are 2. 03 and 4. 18 J/g·°C, repectively, and the enthalpy of fuion for ice i 6. 02 kJ/mol
Answers
The final temperature of the mixture can be considered as 73°C.
To calculate the final temperature of the mixture, we need to use the heat capacity and the enthalpy of the melting of water. The heat capacity of water is the amount of heat required to raise 1 gram of water by 1 degree Celsius. Melting enthalpy is the amount of heat required to melt one mole of a solid at its melting point.
First, calculate the total heat absorbed in the process of melting the ice. The heat absorbed by ice is equal to the heat capacity of the ice multiplied by the mass of the ice and the change in temperature.
Qice = (mass of ice) x (heat capacity of ice) x (change in temperature)
Qice = (13.1 g) x (2.03 J/g·°C) x (17.9°C - (-17.9°C))
Qice = 13.1 g x 2.03 J/g·°C x 35.8°C = 4,849.8 J
We can also calculate the total heat absorbed by the water during the increase in temperature. The heat absorbed by the water is equal to the heat capacity of water multiplied by the mass of the water and the change in temperature.
Qwater = (mass of water) x (heat capacity of water) x (change in temperature)
Qwater = (103.5 g) x (4.18 J/g°C) x (73.0°C - 0°C)
Qwater = 103.5 g x 4.18 J/g°C x 73.0°C = 30,529.1 J
The final temperature of the mixture can be found by using the total heat absorbed by the ice and water, and the heat of fusion.
The final temperature of the mixture is approximately equal to the temperature of the water before mixing (73.0°C) because the heat absorbed by the ice during melting is much smaller than the heat absorbed by the water during heating.
Q total = Q ice + Q water + heat of fusion
Q total = 4,849.8 J + 30,529.1 J + 6,02 kJ/mol x (13.1g / 18g/mol)
Now we can solve for the final temperature:
Final temperature= Q total / (mass of mixture * heat capacity of water)
The final temperature of the mixture can be considered as 73°C.
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Fill in the blanks: Repeating an experiment several times and averaging the results helps to
reduce
Answers
Averaging the data from multiple iterations of an experiment can assist to cut down on errors.
What do you mean experiment?An action or method carried out under controlled circumstances in order to ascertain a hypothesis, discover an undiscovered effect, or establish a law. To establish cause-and-effect, or if changes in one variable might affect changes in another, researchers frequently conduct a straightforward experiment. Experimentation is a research method that involves deliberately changing one or more variables and then observing the outcomes or impacts on other variables. In experimental designs, controls are routinely employed to track system variability and search for error sources.
Why is experiment important?We can make better decisions about our ideas and projects by experimenting. People frequently make the error of taking an idea and running with it without first evaluating the underlying premises. Although we frequently don't know, we only presume when we think we do. The reason why experimentation is so crucial to science is because it gives researchers a set of organised processes to take in order to respond to queries or claims about the natural world. Additionally, experimentation generates crucial data and findings to support the validity and reliability of claims made in an effort to comprehend the world more fully.
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Describe in detail the 3 different plate boundaries. This should be 5 to 6 sentences long and using your best grammar.
Answers
Paleomagnetism, The strength and direction of the earth's magnetic field at the time the rocks formed are preserved in many rocks.
Which rocks are mainly responsible for magnetism? Mostly in rocks that are igneous. Iron and other magnetic minerals can move and align with the planet's magnetic polarity when in the liquid stage of magma. These minerals are trapped in their original positions after the magma cools.Because minerals cannot move once they are cooled, this alignment reveals the polarity of the Earth's magnetic fields at the time the rock formed.Laterally deposited igneous rock layers will exhibit various mineral orientations and demonstrate how the planet's magnetic fields altered over time.The rocks include records of previous magnetic field reversals. Iron-rich minerals that function as small magnets are found in many rocks. These minerals start to develop as magma or lava cools.The magnetic minerals floating in the molten mass align themselves with the magnetic field because the molten rock has not yet fully hardened. These minerals "lock in" the magnetic field as numerous small compasses when the rock ultimately forms.To learn more about grammar sentences refer to:
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Draw a chiral aldehyde with the formula C3H5BrO.
You do not have to explicitly draw H atoms. In cases where there is more than one answer, just draw one.
Answers
The structure of chiral aldehyde with the formula C3H5BrO would have an aldehyde group at C1 atoms and Br attached to the terminal C atom of the chain.
An organic substance with a -CHO functional group is an aldehyde. We can start by drawing a linear chain with the substituents and then draw branched carbon chains at non-equivalent carbon atoms to create all the structures. According to the nomenclature rules for organic compounds, C3H5BrO can be named as 2-bromopropanal or 2-bromo-propionaldehyde. This compound will have an aldehyde group at C1 and a methyl group and a halide group attached to C2 atom of the chain.
Aldehydes are recognised as organic substances because they have a -CHO functional group. It has a carbonyl centre, which implies that a carbon atom will form a double bond with an oxygen atom and that the same carbon centre is joined to an alkyl group or additional hydrogen atoms.
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what is the number of nitrogen molecules that reacted with excess hydrogen to make 2 x 10000000000 molecules of ammonia?A. 3 X 10000000000B. 1 X 10000000000C. 2 X 10000000000D. 5 X 1000000000
Answers
The number of the nitrogen molecules that reacted with the excess of the hydrogen to make 2 × 10¹⁰ molecules of the ammonia is 1 × 10¹⁰ molecules.
The reaction is given as :
N₂ + 3H₂ ---> 2NH₃
The number of the molecules of the ammonia = 2 × 10¹⁰ molecules
1 molecules of the ammonia will produces the 2 molecules of the ammonia
The number of the molecules of the nitrogen = ( 1/ 2) ×2 × 10¹⁰ molecules
The number of the molecules of the nitrogen = 1 × 10¹⁰ molecules.
Thus, the molecules of the nitrogen is 1 × 10¹⁰ molecules.
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A sealed vessel contains 0. 200 mol of oxygen gas, 0. 100 mol of nitrogen gas, and 0. 200 mol of argon gas. The total pressure of the gas mixture is 5. 00 atm. The partial pressure of the argon is responses 0. 200 atm 0. 200 atm 0. 500 atm 0. 500 atm 1. 00 atm 1. 00 atm 2. 00 atm 2. 00 atm 5. 00 atm.
Answers
Answer:
Below
Explanation:
Each exerts pressure proportional to its fraction of the total
total = .200 + .100 + .200 = .500 mol
argon is .200 of this
.200 / .500 * 5 atm = 2 atm
What is the molarity of 1. 5 liters of an aqueous solution that contains 2 moles of lithium fluoride, lif.
Answers
The molarity of that aqueous is 1.3 M. As per given information already contain moles and volume, all you have to do is divide the moles with volume.
How to calculate the molarity of that aqueous?Molarity or symbolize as M is the total amount of a substance in the certain volume of a solution. Molarity in a correlation with mole and volume are defined as the moles per liter. Molarity is also called as the molar concentration of a solution. In formula, molarity(M) will be represent as M = m : V. As per data given m = 2 moles and V = 1.5 liters. The value of its molarity will be:
M = m : V
M = 2 : 1.5
M = 1.3 M
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If we react 10 moles of hydrogen with 6 moles of oxygen. what is the limiting reagent and how much water is produced?
Answers
The weight of hydrogen is equal to moles multiplied by the molar mass since we are asked to determine its weight. It will be 24 grammes because that is 2, thus this is 24 grammes.
How many moles of CO2 are produced from 6 moles of O2?The mole ratio of O2 to CO2 is 1:1 according to the equation that is balanced. Thus, the amount of CO2 created from 6 moles of O2 is equal to (1/1) x 6 mol, or 6 mol.The reaction's byproducts contain 24 oxygen atoms. In total, 6 oxygen molecules are needed for every glucose molecule in the process. The molecular formula for ATP energy is 6O2 + C6H12O6 --> 6CO2 + 6H2O.After the reaction is finished, 10 moles of water will be produced. Explanation: Water is being produced by the reaction between 10 moles of hydrogen and 6 moles of oxygen.Thus, the reaction between ten volumes of dihydrogen gas and five volumes of oxygen gas results in ten volumes of water vapour. Keep in mind the Avogadro's law, which explains how the volume and number of moles relate to one another.To learn more about moles refer to:
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71.05 g of sodium sulfate (Na2SO4) are dissolved to obtain 2 liters of standard solution. What is the concentration of a solution
Answers
Answer:
I do k .............................
A science teacher adds water to a strong acid for use in the lab with students. this makes the concentration_____, because the amount of solute per volume of solvent_____.
Answers
A powerful acid is made into a solution by a science instructor so that pupils can use it in the lab. This weakens the concentration since there is less solute per quantity of liquid.
Exactly what is an acid?A substance is considered an acid if it produces a sour taste in water solution, turns blue litmus paper red, reacts with the some metals to release hydrogen, reacts chemically bases and form salts, and encourages chemical reaction.
Which of these three acids are they?Typically, acids can be categorized into three main groups. Binary acid comes in first, followed by oxyacid and carboxylic acid, respectively. All of the names of binary acids begin with "H-A," which stands for a hydroxyl group to a nonmetal atom.
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Answer:
weaker
decreases
Explanation:
edge 2023
Calculate the mass of 34.2 moles of calcium carbonate
Answers
Answer:
approximately 3423 grams
Explanation:
The molecular weight of CaCO3 is 100.0869
Therefore,
Mass = 34.2 × 100.0869
= 3422.97198
A student is trying to identify the composition of a pure metal block by determining its density. The student records the mass of the sample to be 20.0 g. The rectangular block is 1.00 cm x 4.00 cm * 1.40 cm. 7th attempt M See Periodic Table See Hint Calculate the density (in g/cm2). Express your answer to the correct number of significant figures. Answer: g/cm > 6th attempt
Answers
The necessary equation to determine the density of the block is "d = 25 g / 8.4 cm".
Define density?The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however Latin letter D may also be used. Mass divided by volume is the formula for density in mathematics: display style rho = frac mV. where m is the mass, V is the volume, and is the density.Density is the measure of an object's mass per unit volume. Kilograms per cubic meter (kg/m3) is the SI unit for density.The amount of something per unit of length, area, or volume: as. : the substance's mass per unit volume. given in grams per cubic centimeter is density.To learn more about density refer to:
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The provided metal block will have a density of 3.57 g/cm².
Why is metal density important?A material's specific gravity can be used to comprehend density in terms that are more relatable by measuring a substance's mass per volume. The ratio of a material's density to that of water is known as specific gravity. It is a relative (unitless) way to express how much something weighs.
What causes metals to be dense?Because their atoms are tightly packed together in a tiny area, metals have a high density. Metallic bonding is mostly to blame for this. Strong electrostatic attraction between metal cations and delocalized electrons is known as metallic bonding. As a result, the crystalline lattice structure is arranged in a predictable way.
Calculation:Volume of the given block = 1.00 x 4.00 x 1.40
⇒ Volume = 5.6 cm³
Density = mass/volume
⇒ Density = 20/5.6 = 3.57 g/cm²
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List several pieces of information you can determine about a chemical reaction just by reading the chemical equation.
Answers
Chemical reactions are the processes by which a material or substances change to create new compounds with new attributes.
What does "chemical reaction" mean?Through its symbols and equations, a chemical equation reveals information about the reactants and products. the proportion of reactants to molecules. The relative masses of reactants and products are taken into account when molecular masses are represented in grams as "Unified Masses" (U).
as an example of a chemical process:When one or more chemicals transform into one or more other compounds, a chemical reaction takes place. For instance, the reaction between vinegar and baking soda produces sodium acetate, carbon dioxide, and water, and the reaction between iron and oxygen results in rust.
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When phosphate rock is treated with nitric acid-soluble salts are produced that can be used as fertilisers. Give the TWO substances produced when nitric acid reacts with phosphate salt.
Answers
Answer:
Phosphoric acid and sodium nitrate.
Explanation:
The balanced chemical equation for the reaction between nitric acid (HNO3) and phosphate salt (Na3PO4) is:
3 HNO3 + Na3PO4 → H3PO4 + 3 NaNO3
The products of this reaction are phosphoric acid (H3PO4) and sodium nitrate (NaNO3). Therefore, they are the two substances produced as a result of this reaction.
I hope this helps!
The two substances produced during chemical change is Phosphoric acid and sodium nitrate.
What is chemical change?
Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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HELP!!!!!!!! This question is rlly confusing!!!!
Answers
The forms of heat transfer and examples of them when matched, are:
Conduction:
Touch transfers heat Earth warms airConvection :
Warm air rises Liquid / gas transfer heatRadiation
Sun heats Earth Waves transfer heat What are the forms of heat transfer ?There are three main forms of heat transfer:
Conduction: This is the transfer of heat through a solid material. Heat is conducted through the material by the collision of atoms and molecules. Touch therefore transfers heat.
Convection: This is the transfer of heat by the movement of a fluid or gas. In convection, heat is transferred by the movement of the fluid or gas itself.
Radiation: This is the transfer of heat by electromagnetic waves, such as infrared radiation. Radiation does not require a medium for heat transfer and can occur in a vacuum. The sun's energy reaches the Earth through radiation, and heat from a fire can also be felt by radiation.
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Draw (on paper) a Lewis diagram for CH3CH2CH2OH
Use your diagram to answer the following questions.
The number of C-H bonds =
The number of O-H bonds is
The number of C-C single bonds =
The number of C-O single bonds =
The total number of lone pairs =
Answers
The structure of ethanol is shown below. As a result, the molecule CH3CH2OH C H 3 C H 2 O H is polar. Both a Lewis acid and a Lewis base, CH3CH2OH C H 3 C H 2 O H, can function.
Due to the oxygen atom's lone pair of electrons, it is primarily a Lewis base. The most polar of these is the O-H bond. The difference in electronegativity between the two atoms involved can be used to explain it. Ethanol, with the chemical formula CH3 CH2 OH, contains hydrogen bonds. Covalent bonds between hydrogen atoms produce hydrogen bonds. However, CH3CH2OH alone displays hydrogen bonding, which is substantially stronger than the intermolecular forces that are present in the other options.
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Using the Lewis diagram, I was able to determine that: 1) there are 7 C-H bonds, 2) there are 1 O-H bonds, and 3) The C-C bond count is 2, 4) The C-O bond count is 1, 5) There are 2 lone pairings.
Lewis diagram, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms in molecules as well as any lone pairs of electrons that may be present. Any covalently bound molecule, as well as coordination compounds, can be represented by a Lewis structure. Gilbert N. Lewis introduced the Lewis structure in his 1916 essay The Atom and the Molecule, and it bears his name. By adding lines between atoms to indicate shared pairs in a chemical bond, Lewis structures expand on the idea of the electron dot diagram.
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1. Draw the equilibrium mechanism between caffeine and aqueous acid.
2. Using resonance structures, explain why one nitrogen is more basic than the others. (Hint: Only one nitrogen can resonate a positive charge around the ring once protonated.)
Answers
Caffeine is a natural stimulant found in coffee, tea and cacao plants. In acidic medium it will get protonated and become a conjugate acid.
Caffeine in an acidic medium acts as a base and accept a proton from the acid. The proton is accepted by the double bonded nitrogen in the imidazole ring. This later occurs in resonance with two other structures. The conjugate acid is soluble.
While comparing the resonance structures, we could see that one nitrogen is more basic than the others. This is because all the other nitrogen atoms are covalently bonded with surrounding atoms and stable by completing octet. But in the case of nitrogen in the imidazole ring it has a lone pair of electron, which is available for donation and protonated easily. So the nitrogen numbered 1 is more basic.
So in acidic medium caffeine acts as a base, get protonated and form a conjugate acid, which is soluble.
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How much water will be produced by combustion of 25.0g of H2 in the precedence of 100.g of 02?
H2(g)+02(g) 2 H20(I)
Answers
The total amount of water produced is equal is 12.5 moles or 250g of H2O.
What is moles?Moles are small, burrowing creatures found in gardens, yards, and fields. They are members of the Talpidae family and most commonly found in the Northern Hemisphere. Moles are adapted to living underground, where they eat earthworms, grubs, and other small invertebrates. They also consume plant material and are known to damage lawns and gardens. Moles have large claws and a pointed snout which they use to dig tunnels and chambers.
The amount of water produced by the combustion of 25.0g of H2 in the presence of 100g of O2 can be calculated using the balanced equation and the law of conservation of mass. The equation shows that 2 moles of water is produced by the combustion of 1 mole of H2 and 1 mole of O2.
Since 25.0g of H2 is equal to 1.25 moles and 100g of O2 is equal to 5 moles, then the total amount of water produced is equal to 2 * 1.25 * 5 = 12.5 moles or 250g of H2O.
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