When a substance is entering a phase change, the gain or loss of heat is a result of energy gained or lost in forming or breaking intermolecular interaction.
The constant temperatures occur when a substance is undergoing a phase transition. If heat is removed from a substance , such as in freezing and condensation , then the process is exothermic . In this instance , heat is decreasing the speed of the molecules causing then move slower.
Example : liquid to solid and gas to liquid .
These changes release heat to the surrounding.
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Solid iron combines with oxygen gas to form solid iron(III) oxide. Which of the following equations best describes this reaction?
(A) Ir + O₂--> IrO₂
(B) 4 Fe + 3 0₂---> 2 Fe₂O3
(C) I+ 0₂ ---> 10₂
(D) 3 Ir + 0₂ -> 6 Ir₂03
Select one:
O a. A
Ob. B
O C. C
O d. D
Answer:
B. 4 Fe + 3 0₂---> 2 Fe₂O3
Explanation:
(A) Ir + O₂--> IrO₂ No: Ir is iridium
(B) 4 Fe + 3 0₂---> 2 Fe₂O3 Yes: Fe is iron and O is oxygen, and the equation is balanced.
(C) I+ 0₂ ---> 10₂ No: I is iodine
(D) 3 Ir + 0₂ -> 6 Ir₂03 No: I is iodine
The surfaces of the cylinder block and cylinder head are _______ to help cool the engine.
The surfaces of the cylinder block and cylinder head are interconnected to help cool the engine.
When an automobile engine is running, it generates a lot of heat and needs to be continuously cooled to prevent engine damage.
This is typically accomplished by pumping coolant liquid—often water combined with antifreeze solution—through unique cooling tubes. Air passing across cylinder casings with fins helps cool some engines.
The cylinder head and block of a water-cooled engine are interconnected by coolant channels. All of the channels come together to form a single exit at the top of the cylinder head.
Hot coolant is forced out of the engine and into the radiator, which serves as a type of heat exchanger, by a pump that is driven by a pulley and belt from the crankshaft.
Unwanted heat is transferred from the radiator into the air stream, after which the cooled liquid flows back into the channels after returning to an entrance at the bottom of the block.
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In an experiment, 10.0 g of magnesium reacted with excess hydrochloric acid forming magnesium chloride. Mg(s) +2HCl(aq) → MgCl2(aq) +H2(g)
At the completion of the reaction, 29.5 g of magnesium chloride was produced. Calculate the percent yield. (Pls help)
Answer: 75.3%
Explanation:
Mg molar mass = 24
MgCl2 molar mass = 94
—> 94 x 10 / 24
29.5/1 x 24/94 x 10
= 29.5 x 24 / 94 x 10
since we are looking for percentage yield we multiply by 100
= 29.5 x 24 x 100 / 94 x 10 = 75.3%
If the ph at the half-titration point of a monoprotic weak acid is 4. 2, what is the ka of the acid?.
Ka= 2.1106
The ka value of the acid will be:
Ka=2.1106
Finding the ka of the acid- The idea is that at the half-equivalence point, the pH of the solution will be equal to the pKa of the weak acid.If you're titrating a weak monoprotic acid, which I'll refer to as HA, you already know that at the equivalence point, the strong base will completely neutralize the weak acid.HA(aq)+OH−(aq)→A−(aq)+H2O(l)
Because of this, when you combine an equal number of moles of a weak acid with a strong base, all of the moles of the weak acid will be consumed, leaving you with A, the conjugate base of the weak acid.You have now added enough moles of the strong base to the solution to neutralize half of the weak acid molecules. The equivalent point by half refers to this location.The ratios of the weak acid, strong base, and conjugate base are all 1:1, meaning that what you produce as the conjugate base is what you eat as the weak acid and strong base. Half of the weak acid's moles will be consumed by the reaction, while the conjugate base is generated in an equal amount.Consequently, when a weak acid and a strong base are combined in an equal amount.The weak acid and its conjugate base will therefore be present in equal amounts in the solution at the 50% equivalence point, suggesting that you are now working with a buffer solution.As you are aware, the pH of a weak acid-conjugate base buffer can be determined using the Henderson-Hasselbalch equation pH=pKa+log ([conjugate base][weak acid])You reach the halfway point when
[HA]=[A−]
It implies that
log([HA][A−])=log(1)=0
As a result, it can be claimed that at the half-equivalence point, the pH of the solution and the pKa of the weak acid are equivalent.
pH=pKa at the midpoint of equivalency.
The pKa is determined by the weak acid's acid dissociation constant, Ka. Ka=10pKa, as shown by the formula pKa=log(Ka).
When the two points are half equal, Ka=10pH will exist.
Put in your value to learn Ka=105.67=2.1106.
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The value of the rate constant at 302°c is 2. 45 × 10-4 l/mol s and at 508°c the rate constant is 0. 0965 l/mol s. the value of r is 8. 3145 j/k mol. Calculate the activation energy for this reaction
The activation energy for this reaction is - 55.5 kJ/mol
Calculation,
Given data,
First temperature [tex]T_{1}[/tex] = 302°C = 302+273 = 575 K
Second temperature [tex]T_{2}[/tex] = 508°C = 508+273 = 781 K
rate constant at 302°C = 2. 45 × [tex]10^{-4}[/tex] lit/mol s
rate constant at 508°C = 0. 0965 lit/mol s.
Value of universal gas constant = 8.3145 J/k mol.
Apply Arrhenius equation,
㏒[tex]K_{1} /K_{2}[/tex] = [tex]E_{a}/2.203R[/tex] [1/ 575 K - 1/781 K]
㏒2. 45×[tex]10^{-4}[/tex] lit/mol s/0.0965 lit/mol s = [tex]E_{a}[/tex] /2.303×8.3145 J/k mol[781-575/575K×781 K]
[tex]E_{a}[/tex] = - 55.5 kJ/mol
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If the normal physiological concentration of hco3− is 24 mm , what is the ph of blood if pco2 drops to 35.0 mmhg ?
The pH of blood if pco2 drops to 35.0 mmhg is 7.459
The pH of the blood can be calculated using the Henderson- Hasselbalch equation, it explains the relation between acid dissociation constant pKa and pH in biological and chemical systems.
pH = pK + log ( HCO3- / ( 0.03 * PCO2 ) )
pK is 6.1 for bicarbonate buffer system.
HCO3- = 24mm
PCO2 = 35.0 mmhg
pH = 6.1 + log ( 24 / 0.03 * 35.0 )
= 6.1 + log ( 24 / 1.05 )
= 6.1 + log 22.8571
= 6.1 + 1.3590
= 7.459
Hence, the pH of blood is 7.459
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What is the molarity of a koh solution if 200 ml of the solution contains 0. 6 moles KOH?
3M
3M is the molarity of a koh solution if 200 ml of the solution contains 0. 6 moles KOH.
Molarity : Molarity is defined as the number of moles of solute present in one liter of solution.
We know that,
Molarity = [tex]\frac{n*1000}{v}[/tex]
where,
n = moles of solute of KOH = 0.6
V= volume of solution in ml= 200 ml
Now on substituting the values in the molarity formula,
molarity = [tex]\frac{0.6*1000}{200}[/tex] = 3M/L
Therefore, molarity = 3M
What is meant by molarity?The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.To learn more about molarity visit:
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If 0.0309 mol CaCl2 is dissolved in water to make a 0.730 M solution, what is the volume of the solution
Answer:
0.0423 L
Explanation:
Molarity can be represented by the following ratio:
Molarity = moles / volume (L)
You can plug the given values into the equation and simplify to find the volume.
Molarity = moles / volume
0.730 M = 0.0309 moles / volume
(0.730 M) x volume = 0.0309 moles
volume = 0.0423 L
Use the Ideal Gal Law to calculate the following problem. How many moles of gas are contained in a 4.2 L container at 2.7 atm and 305 K?
Answer:
0.453 moles
Explanation:
The Ideal Gas Law equation looks like this:
PV = nRT
In this formula,
-----> P = pressure (atm)
-----> V = volume (L)
-----> n = moles
-----> R = Ideal Gas Constant (0.08206 atm*L/mol*K)
-----> T = temperature (K)
To find the amount of moles of gas, you can plug the given values into the equation and then simplify.
P = 2.7 atm R = 0.08206 atm*L/mol*K
V = 4.2 L T = 305 K
n = ? moles
PV = nRT
(2.7 atm)(4.2 L) = n(0.08206 atm*L/mol*K)(305 K)
11.34 = n(25.0283)
0.453 = n
Identify the reactants and the products in this chemical equation. 2fe2o3 3c → 4fe 3co2
Answer:
Reactants: Fe₂O₃ and C
Products: Fe and CO₂
Explanation:
The reactants are the molecules that undergo changes in a reaction.
The products are the molecules which are made during a reaction.
The reactants are on the left side of the arrow and the products are on the right side of the arrow. Therefore.....
The chemical reaction:
2 Fe₂O₃ + 3 C -----> 4 Fe + 3 CO₃
Reactants: Fe₂O₃ and C
Products: Fe and CO₂
What mass of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
91.4 grams
91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
C = mol/volume
2.45M=mol/0.5L
2.45M⋅0.5L = mol
mol = 1.225
Convert no. of moles to grams using the atomic mass of K + Cl
1.225mol * [tex]\frac{39.1+35.5}{mol}[/tex]
mol=1.225
=1.225 mol . [tex]\frac{74.6g}{mol}[/tex]
=1.225 . 74.6
=91.4g
therefore, 91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.
What is 1 molar solution?
In order to create a 1 molar (M) solution, 1.0 Gram Molecular Weight of the chemical must be dissolved in 1 liter of water.
58.44 g make up a 1M solution of NaCl.
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According to the iupac convention, alkyl substituents on a hydrocarbon chain should be listed in which order?
According to the IUPAC convention alkyl substituents on a hydrocarbon chain should be listed in alphabetical without considering prefixes order.
What is IUPAC convention?IUPAC convention of organic chemistry is a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).
The name of the compound is written out with the substituents in alphabetical order followed by the base name (derived from the number of carbons in the parent chain).
Types of IUPAC Nomenclature of a few important aliphatic compounds:
AlkaneAlkeneAlkyneExample :
Ethane, which has 2 carbon atoms and 6 hydrogen atoms, with the molecular formula of = C₂H₆
Formation of alkyl group:
Methane (CH₄) Remove 1 hydrogen (H) convert to methyl (H₃-C-)
Example: Propyl (-CH₃ - CH₂ - CH₂ - )
According to the IUPAC convention alkyl substituents on a hydrocarbon chain should be listed in alphabetical without considering prefixes order.
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A mixture of three gases containing an equal number of moles of each gas has a total pressure of 12. 0 atm. What is the partial pressure of each gas?
A mixture of three gases containing an equal number of moles of each gas has a total pressure of 12. 0 atm then partial pressure of each gas is 4 atm .
Calculation ,
According to Dalton law the total gas of the container is equal to the sum of partial pressure of each gas .
[tex]P_{t}[/tex] = [tex]P_{1}[/tex] +[tex]P_{2}[/tex]+ [tex]P_{3}[/tex]
Partial pressure = total pressure × mole fraction
mole of each gas is equal . So, mole fraction is also equal for each gas.
Let the number of mole = x
mole fraction = x/3x =1/3
[tex]P_{1}[/tex] = 12. 0 atm/3 = 4 atm
[tex]P_{2}[/tex] = 12. 0 atm/3 = 4 atm
[tex]P_{3}[/tex] = 12. 0 atm/3 = 4 atm
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Consider the slightly soluble base bs(oh)2. if the molar solubility of the base is 1.82 ⋅ 10 − 2 , what concentration of hydroxide is dissolved in a saturated solution?
Answer:
Explanation to the following:
What was the oxygen consumption for a burmese python at 20 contractions per minute?
The oxygen consumption for a burmese python at 20 contractions per minute 5,30,35,10,15,20,25 contractions per minute.
PythonThe Eastern Hemisphere's tropical and subtropical regions are home to the genus Python, a family of constricting snakes. For non-venomous flecked snakes, François Marie Daudin suggested the name "Python" in 1803. There are now 10 recognized python species. A new species has been established, and three previously recognized python subspecies have been elevated.
Ythons lack venom, and colubrids (rear-fanged snakes) either lack venom entirely or have a weak venom. It is important to take venomous elapid (front-fanged snake) bites seriously and treat them accordingly. Massive snakes called pythons have a brutal killing style. These snakes, like other strong constrictors like anacondas, will capture their victims with their mouths and wrap around them.
What was the oxygen consumption for a burmese python at 20 contractions per minute?
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What is the molecular formula of the smallest neutral compound of nitrogen and hydrogen?
N3H is the correct answer.
N3H is the molecular formula of the smallest neutral compound of nitrogen and hydrogen.
What is a molecular formula?an expression that lists the quantity and kind of atoms that make up a substance's molecules.
How can you determine a compound's molecular formula?Subtract the empirical formula for molar mass from the molar mass of the chemical. The outcome ought to be a full number or extremely close to one. Using the entire number discovered in step 2, multiply each subscript in the empirical formula by that number. The molecular formula is the outcome.Empirical and molecular formula: what are they?The simplest whole-number ratio of the various atoms in a compound is represented by an empirical formula. The precise number of various atom types present in a compound's molecule is indicated by the molecular formula.To learn more about molecular formula visit:
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Write a balanced chemical equation for the standard formation reaction of liquid acetic acid hch3co2.
The balanced chemical equation for the standard formation reaction of liquid acetic acid is given as ,
[tex]2C(gr) +2H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]
The reaction that form the products from their elements in their standard state is called formation of reaction .The acetic acid consist C , H , and O , So, determine their standard state . Carbon is graphite at 25°C and 1 atm , whereas hydrogen and oxygen are diatomic gases . Hence , we start with unbalanced reaction.
[tex]C(gr) +H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]
The balanced chemical equation for the standard formation reaction of liquid acetic acid as,
[tex]2C(gr) +2H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]
The combustion of liquid acetic acid is given as,
[tex]CH_{3} COOH(l) + 2O(g)[/tex] → [tex]2CO_{2}((g) +2H_{2} O(l)[/tex] ΔH =-873
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6. What is the expected product from the reaction of potassium with oxygen?
О ко
О K2O2
О K2O
KOz
Answer:
K2O2 and KO2 is the answer
Answer:
C.) K₂O
Explanation:
Potassium (K) always forms the cation K⁺.
Oxygen (O) always forms the anion O²⁻.
The ionic compound these two ions form must have an overall charge of 0. However, the dissimilar charges on the ions do not cancel out (+1 + (-2) = -1). Therefore, you need to have two K⁺ ions in the compound to balance the charges (+1 +1 + (-2) = 0).
If the rock had originally 2400 atoms of u 235 and now has 440 left, how many atoms of pb 207 are there in the rock now?
436 atoms of Pb 207 are left in the rock.
Radioactive decay:Alpha and beta decays are the mechanism through which uranium transforms into the lead. While 235U and its daughter nuclides only experience seven alpha and four beta decays, 238U and its daughter nuclides suffer eight alpha and six beta decays overall.
When there are too few neutrons in relation to protons, alpha decay occurs. There is the discharge of an alpha particle, which consists of two protons and two neutrons.
When there are more neutrons than protons, beta decay can happen. A high-speed electron is ejected from a proton that transforms spontaneously from a neutron.
Since gamma radiation is emitted as a wave rather than a particle, the atomic structure of an atom remains unaltered. Atomic fission is the primary cause of neutron emission. At one time, many neutrons can be released.
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Which combination of properties would be expected to lead to the most viscous liquid?
The combination of properties would be expected to lead to the most viscous liquid include:
Low temperatureStrong intermolecular forceWhat is Viscosity?This is defined as the resistance of a liquid to flow and is characterized by its sticky nature.
This is as a result of the strong intermolecular forces which holds the atoms together and low temperature keeps them in shape thereby making it the most appropriate c hoice.
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The oxygen consumption rate of a 200 kg seal is 10 ml/(g h). assuming that it has oxygen stores of 2 liters, how many minutes can it dive before running completely out of oxygen?
The oxygen consumption rate of a 200 kg seal is 10 ml/(g h). If it has oxygen stores of 2 liters, then minutes can it dive before running completely out of oxygen is 0.06min.
What is meant by oxygen consumption?Oxygen is one of the most vital element of the organism which is required by almost all the cellular and for all metabolic activities to perform body function.
It is consumed by the respiratory system and passed ro each cell by circulatory system of the body.
Given,
Mass of seal = 200kg = 200000 g
Rate of oxygen consumption = 10 ml/gh
The volume of stored O2 = 2000mL
The time of consumption is calculated as
t = V/mr
t = 2000/200000×10
t = 0.001 hrs
In minutes
t = 0.06min.
Thus 0.06min is required to dive out the oxygen stores of 2 litre.
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He fuel used in many disposable lighters is liquid butane, c4h10c4h10. butane has a molecular weight of 58. 1 grams in one mole. how many carbon atoms are in 2. 00 gg of butane?
Carbon atoms present in 2. 00 g of butane is 8.28 × 10^22.
Molecular weight of C4H10 is = 58.1 grams
Moles of butane = given mass/ molar mass
= 2/58.1
= 0.0344 mol
Multiply the number of moles by Avogadro's number. This will let you obtain the number of butane molecules:
0.0344 x 6.023 x 10^{23} molecules of butane = 2.07 × 10^22 molecules
of butane
Now multiply this number by four (due to four carbon atoms per butane molecule) to obtain the answer:
so, no. of carbon atoms = 4 x 2.07x 10^22 = 8.28x 10^22 atoms.
Thus the no. of carbon atom is 8.28×10^22.
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How many grams of calcium phosphate are theoretically produced if we start with 3. 40 moles of calcium nitrate and 2. 40 moles of lithium phosphate?
There are 372 grams of calcium phosphate are theoretically produced if we start with 3. 40 moles of calcium nitrate and 2. 40 moles of lithium phosphate .
Calculation,
The reactant or reagent that produces the least moles of the products is called limiting reagents. When limiting reagents used up , the reaction stops.
The balanced equation is given as,
[tex]3Ca(NO_{3} )_{2} + 2Li_{3} ( PO_{4} )[/tex] → [tex]3LiNO_{3} + Ca_{3}( PO_{4} )_{2}[/tex]
Multiply the moles of each reactant by the mole ratio between it and calcium phosphate in the balanced equation . so that the moles of the reactant cancel , leaving moles of calcium phosphate.
3.4 mol of calcium nitrate × 1 mol calcium phosphate / 3 mol calcium nitrate = 1.13 mol calcium phosphate
2.4 mol of lithium phosphate× 1 mol calcium phosphate / 2 mol lithium phosphate = 1.02 mol calcium phosphate
So, calcium nitrate is limiting reactant .
Calculation of mass of 1.02 mol calcium phosphate.
Multiply the moles of calcium phosphate by its molar mass.
molar mass of calcium phosphate = 3×40.078 g/mol calcium ion+2×30.9 g/mol phosphorus + 8×15.99 g/mol calcium phosphate = 310.178 g/mol calcium phosphate
1.20 mol calcium phosphate × 310.178 g/mol = 372 gram
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What is observed when magnesium is reacted with hydrochloric acid? choose all that apply
It is observed that when magnesium reacts with hydrochloric acid, it produces visible bubbles of hydrogen gas.
A vigorous reaction will occur giving rise of heat as it is an exothermic reaction. If heat is applied then it should be more vigorous.
Reaction is as follows:
Mg(s) + HCl (aq) --> MgCl2 (aq) + H2(g)
Magnesium reacts easily with HCl to produce H2 gas and magnesium ions, Mg2+, and heat. The reaction is exothermic, so it heats up quickly.
Mg(s) + HCl (aq) --> MgCl2(aq) + H2(g)
The net ionic equation :
Mg(s) + 2H+ --> Mg2 + H2(g)
If water is removed from the solution then white crystals of Mgcl2 is obtained.
Or in simple words,
2Mg + 2HCl -> 2Mg+ + 2Cl- + H2(gas)
The magnesium is attacked by the hydrochloric acid resulting in the magnesium dissolving into the solution resulting in a solution of magnesium chloride in hydrochloric acid and the production of hydrogen gas.
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Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons. Write a complete, balanced equation for this nuclear process
Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons then the complete, balanced equation for this nuclear process is given a ,
[tex]^{238} _{92}U + ^{12} _{6} C[/tex] → [tex]^{246} _{98} Cf + 4^{1} _{0} n[/tex]
Nuclear fusion reactions are defined as the reaction in which, two or more lighter atoms combine to form a heavier atom. The number of atoms formed in this reaction decreases from the given atoms. The nuclear process is also nuclear fusion.
Example : Bombardment of uranium-238 nuclei
Chain reactions are defined as the reaction in which the neutrons that are released in the previous fission reaction act as the starting material in the next reaction. Thus, this process continues to many reactions.
Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.
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Identify the compound with the highest boiling point. ch3och3 ch3ch2ch3 ch3ch2oh ch3oh
The compound with the highest boiling point is [tex]CH_{3} CH_{2} OH[/tex] .
So, option C is correct one.
The boiling point depend two factors,
Bonding between moleculeMolecular mass is directly proportional to the boiling point.The boiling point of ether is less than alcohols because alcohol form hydrogen-bonding .The hydrogen bond is strongest bond. So, ethyl alcohol and methyl alcohol has more boiling point than dimethy ether.
The propane molecules have only van-der waals force of attraction, which is weakest force of attraction.So, propane has lowest boiling point.
The molecular mass of ethanol is greater than methaol. So, ethanol has higher boiling point.
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Using this balance, can you estimate the mass to the nearest milligram?
Yes, we can use this balance to estimate the mass to the nearest milligram.
What is the balance?The weighing balance is the kind of scale that can be used to measure the mass of a body. We know that mass is the quantity of matter that is contained in a body and the the SI unit of mass is the kilogram.
Looking at the balance as it is graduated in milligrams, we know that measurement to the nearest gram means measurement to the nearest whole number so we can say that the answer is yes. We can use this balance to estimate the mass to the nearest milligram.
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What atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 ?
Atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 are one s orbital and 2 p orbital
Sigma bonds are the most powerful type of covalent chemical link. They are generated by atomic orbitals overlapping head-on. For diatomic molecules, sigma bonding is most readily explained using the language and tools of symmetry groups.
Chemical covalent bonds are sigma bonds and pi bonds. The overlap of atomic orbitals creates sigma and pi bonds. Sigma bonds are produced by overlapping from end to end, whereas Pi bonds are created when the lobe of one atomic orbital overlaps another.
Sigma bonding can be seen in the link between two hydrogen atoms. Sigma bonds are also formed between the sp3 orbitals of hybridized carbon and the s orbitals of hydrogen in methane.
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Which compound reacts third fastest with fuming sulfuric acid? a. Toluene b. Chlorobenzene d. Nitrobenzene e. Benzene c. Aniline.
Toluene compound reacts third fastest with fuming sulfuric acid.
The reaction is attached in figure -
When nitration of toluene is carried out in presence of fuming nitric acid and fuming sulfuric acid under 333 K temperature , 2, 4, 6-trinitro toluene is the final product .This 2, 4, 6-trinitro toluene is also called TNT. TNT is used as explosive.What is toluene?
Toluene is a common ingredient in degreasers. It's a colorless liquid with a sweet smell and taste. It evaporates quickly. Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues.What is a toluene used for?
Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues. In homes, toluene may be found in paint thinners, paintbrush cleaners, nail polish, glues, inks and stain removers.Learn more about Toluene
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A student weighs out 0. 0422 g of magnesium metal. The magnesium metal is reacted with excess hydrochloric acid to produce hydrogen gas. A sample of hydrogen gas is collected over water in a eudiometer at 32. 0°c. The volume of collected gas is 43. 9 ml and the atmospheric pressure is 832 mmhg. Using the experimentally collected data, calculate r and the percent error.
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