A. AgBr = Ag+(aq) + Br(aq) (s)
B. H+(aq), OH(aq), and water (l)
C. NH4Cl + NH4+(aq) + Cl(aq) (s)
For the processes that take place when the two provided aqueous solutions are combined, we want to develop the balanced net ionic equations.
A net ionic equation: What is it?a chemical equation that just includes the ions going through chemical changes during the reaction.
A. Magnesium bromide, MgBr2, and silver nitrate, AgNO3.
AgBr = Ag+(aq) + Br(aq) (s)
Because they are spectator ions, NO3 and Mg2+ are excluded from the net ionic equation.
B. potassium hydroxide, KOH, and perchloric acid, HClO4. H+(aq) + OH(aq) H2O (l)
Because they are spectator ions, ClO4 and K+ are excluded from the net ionic equation.
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omar adds 51 ml of naoh to 250.00 ml of 0.500 m hcooh solution. the neutralization reaction resulted in 0.084 moles of hcooh and 0.021 moles of hcoo- left in solution. determine the ph of the resulting solution.
The pH of the solution is pH = 1.65
Final volume of the solution = 250.00 ml + 51 ml
Which on adding gives us the volume of solution as = 301 ml
Since the volume is supposed to be expressed in literes
thus the volume is 301/ 1000 = 0.301 L
Now,
[HCOO-] = 0.021 mol / 0.301 L = 0.069 M
[ HCOOH ] = 0.084 mol/ 0.301 L = 0.279 M
So the pH can be calculated by:
pH = 3.75 + log { 0.069 / 0.279 }
pH = 3.75 - 2.10
pH = 1.65
Thus the pH of the resulting solution is pH = 1.65
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Describe the Kidney's Hilum Which of the following is NOT a correct description of the hilum of the kidney? Choose the best answer. O Renal blood vessels and nerves enter and exit the hilum The hilum is the concave indention of the kidney O The hilum is where the ureter exits the kidney O The hilum is on the most superior surface of the kidney Submit Request Answer
The calyces are the internal kidney structures that direct the urine into the renal pelvis of the ureter.
Urine is first produced in the kidneys and then has to exit the body since it includes dangerous substances and extra fluids. Urine then enters the calyces, travels through the renal pelvis, and finally enters the ureter, where it exits the body. The kidney's hilum is joined to the a. ureter. The best location for the pee to exit the body is through the ureter.
The kidney's central recess through which its arteries, nerves, and ureter travel is known as the renal hilum (Latin: hilum renale) or renal pedicle.
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8- Which one of the following statements is correct? A. The value of Kc gives us the rate of reaction. B. Kc never has units. C. Kc does not depend on temperature. D. When Kc is very large, there are more products formed.
The proper supplied statement is that more products are created when Kc value is very large.
Does the KC value provide us with the reaction rate?The equilibrium constant is Kc. Only the extent of reactions at equilibrium is provided; no information regarding reaction rates is provided.
What does the KC value mean?Its equilibrium value At a specific temperature, the reaction will advance a certain amount, or Kc. 8.2. Products dominate reactants when Kc is greater than 1. (at equilibrium). When there are many more than 1, the reaction essentially ends. More reactants than products are created when Kc is less than 1.
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27. Which of the following molecules are chiral?(EXTRA CREDIT I. 2-Chlorobutane II. 3-Bromopentane ?. 1-Bromo-2-methylpropene IV. 2-Bromo-3-methylbutane A) I,? B) I, IV C) ?, 111
2-Chlorobutane, 2-Bromo-3-methylbutane are chiral .
chiral condition - a compound is said to be chiral if it is surrounded by 4 different groups
I,IV are chiral
II,III are achiral
Molecular types with non-superposable mirror images are known as chiral molecules. The existence of an asymmetric carbon atom in a molecule is the characteristic that most frequently contributes to chirality. When referring to an object that cannot be superposed on its mirror counterpart, the adjective "chiral" is generally employed.
A corkscrew, golf clubs, scissors, and other chiral items all have a "handedness." Thus, one can get scissors and golf clubs that are designed for either hand. Gloves and shoes are also sold in pairs, a right and a left.
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What was the concentration of co2 in the atmosphere when the measurements at mauna loa began?
Answer: 315 ppm
Explanation:
in the laboratory, a quantity of i2 was reacted with excess h2 to give 0.530 moles of hi. it is also known that the percent yield of this reaction was 72.0%. how many moles of i2 reacted? (hint: write a balanced equation.)
Knowing that the percent yield of this reaction was 72.0%, then 0.3681 moles I₂ was reacted with excess H₂.
Percent yield is defined as the ratio of the actual yield to the theoretical yield multiplied by 100.
Percent yield = (actual yield / theoretical yield) x 100
If a quantity of I₂ was reacted with excess H₂ to give 0.530 moles of HI, and the percent yield of this reaction was 72.0%, then the theoretical yield of the reaction should be 0.7361 moles of HI.
Percent yield = (actual yield / theoretical yield) x 100
72 = (0.530 / theoretical yield) x 100
theoretical yield = 0.7361 moles
Then, write a balanced equation for the reaction of I₂ and H₂ to produce HI.
I₂ + H₂ ⇒ 2 HI
From the balanced equation, 1 mole of I₂ requires 1 mole of H₂ to produce 2 moles of HI.
Theoretically, there should be 0.7361 moles of HI.
Let x = moles of I₂
1 mole of I₂ : 2 moles of HI = x mole of I₂ : 0.7361 moles of HI
x = 0.3681 moles I₂
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the molar mass of vanadium is 50.99415. what is the equivalent mass; when it reacts with chlorine to form vcl5?
The equivalent mass when it reacts with chlorine to form VCl₅ is 10.19883 g/mol.
How can you calculate equivalent mass?Calculations are made to determine the equivalent masses of acids, bases, and salts. Acids' molecular masses are equal to their equivalent masses as bases. The molecular mass of a base and its acidity are equal in mass. Total positive valency of metal atoms divided by the salt's molecular mass gives the salt's equivalent mass.
Equivalent mass= molar mass/ valency
(a) For VCl₅, V will have a valency of +5, or more precisely, the oxidation state is +5, since chlorine exhibits a charge of -1. 5 chlorine atoms exhibit a charge of -5, and V exhibits a charge of +5.
so equivalent mass = 50.99415/5 = 10.19883 g/mol.
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Which of the following statements about amino acids is TRUE?
a) Amino acids contain a central α carbon.
b) Amino acids are dipolar ions, or zwitterions.
c) All amino acids, except glycine, contain side chains.
d) Amino acids contain a central α-carbon and are dipolar ions, or zwitterions.
The right answer is D. Amino acids are zwitterions, or dipolar ions, with a core -carbon.
Simple definition of what amino acids are:Amino acids are the building blocks of proteins. Life's essential building blocks are proteins and amino acids. Byproducts of the breakdown or digestion of proteins are amino acids. The body uses amino acids to make proteins that help with meal digestion.
What, for instance, are amino acids?These include alanine, serine, arginine, aspartic acid, taurine, cysteine, ammonia, proline, glycine, trypsin, and tyrosine. Other than these, there are nine other amino acids that are absolutely necessary because our bodies cannot make them.
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what type of pollution is a man washes clothes in a stream using a detergoent that contains phosphorus
Nutrient pollution occurs when a person uses a detergent containing phosphorus to wash his clothing in a stream.
Nutrient pollution, it is the process where too many nutrients, mainly nitrogen and phosphorus, are added to bodies of water and can act like fertilizer, causing excessive growth of algae. Nutrients can run off of land in urban areas where lawn and garden fertilizers are used.
Phosphorus is an essential macronutrient for biota, but it is also a common pollutant because, in many regions of the world, it is delivered in excess to receiving surface waters.
Thus, phosphorus-containing detergent used by a guy to wash his clothing in a stream is nutrient pollution or contamination.
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I need help NOWW PLEASE HELP ME
The reaction of Al₂S₃ with Li forms the displaced product Li₂S₃ and Al. The correct formula of the compound with X having one valence electron and Z with 6 valence electrons is XZ₂. The given reaction in the third image is a single replacement reaction and the reaction in the fourth image is double displacement. Options A, B and E are correct for the reaction in fifth image.
What is displacement reaction?In displacement reactions , an atom or group is displaced by other atom or group from a reactant. In double displacement reactions, two group or atoms are displaced between two reactants.
In the reaction between Al₂S₃ with Li forms the displaced product Li₂S₃ and Al. It is a single displacement reaction.
The element X with 1 valence electron will form a compound with Z having 6 valence electrons with the formula XZ₂. Z needs two electrons to attain octet. Thus two X provides one electron by each to Z.
The reaction of Na metal with HCl producing NaCl and hydrogen gas is a single displacement reaction. Whereas, the reaction between NaCl and MgF2 is double displacement because, both Cl and F atoms are displacing their position.
Sodium phosphate reacts with ferric chloride giving the ferric phosphate precipitate. Here the metals replaces nonmetals and the reaction involves formation of a precipitate. Thus, option A, B and E are correct.
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A population of a wild animal is a frequent target for hunters. Hunters tend to hunt the larger animals with big horns. How might this affect the populations in the wild?
A.
Animals with average horns will increase in number.
B.
Smaller animals with a trait for short horns will become endangered.
C.
Traits for larger animals with big horns will be selected.
D.
Traits for smaller animals with short horns will be selected.
Traits for larger animals with big horns will be selected.
what volume of a 6.0 m solution of hcl should i dilute to create 2.0 liters of a 0.75 m hcl solution?
About 0.25 liters of 6.0 m solutions of HCl should be added to create 2.0 liters of a 0.75 m HCl solution.
Lowering a solute's concentration in a solution is the process of dilution. It entails adding significantly additional water or solvent to the solution. When more solvent is added to a solution without extra solute, the solution gets diluted.
The dilution formula is M₁V₁=M₂V₂. Here, M₁ is the initial molarity, M₂ is the final molarity, V₁ is the initial volume, and V₂ is the final volume.
Given, M₁ is 6.0 M, M₂ is 0.75 M, and V₂ is 2.0 L. We have to find V₁.
[tex]\begin{aligned}V_1&=\frac{M_2V_2}{M_1}\\&=\frac{0.75\times2}{6}\\&=\mathrm{0.25\; L}\end{aligned}[/tex]
The answer is 0.25 L.
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when 0.1 mol of a is mixed with 0.1 mol of b in the reaction chamber and the reaction runs to completion, the 1500 ml of water in the calorimeter heats up from 24.2°c to 25.9°c. what is δh° for the reaction in kj/mol?
Answer:
The answer should be a big load a fried icecream cake.
Explanation:
108xe is expected to be stable.
Two extremely long-lived isotopes and seven stable isotopes make up naturally occurring xenon (54Xe). The isotope with the shortest half-life, 108Xe, has a half-life of 58 s.
There are two extremely long-lived isotopes and seven stable isotopes in naturally occurring xenon (54Xe). Among the nuclides with the longest measured half-lives are 124Xe and 136Xe, which both exhibit double electron capture and double beta decay. The half-lives of 124Xe are 1.8 0.5(stat) 0.1(sys) 1022 years and 2.165 0.016(stat) 0.059(sys) 1021 years, respectively.
A significant role for the man-made isotope 135Xe is played in nuclear fission reactor functioning. The thermal neutron cross section of 135Xe is extremely large.
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the value of specific heat for copper is 390 j/kg⋅c∘, for aluminun is 900 j/kg⋅c∘, and for water is 4186 j/kg⋅c∘.
By applying the law of conservation of heat energy, the equilibrium temperature is equal to 21.97°C.
Specific heat capacity of copper = 390 J/kg°C
Specific. heat capacity. of water. = 4186 J/kg°C
Specific. heat capacity. of aluminum. = 900 J/kg°C
McCc(Tc - Tc) = (MwCw + MaCa)(Tc - Twa)
0.235 × 390× (255 - Tc) = (0.825 × 4186 ) + (0.135 ×900)(Tc - 16)
Tc = 80569.95/3666.6 = 21.97
Equilibrium temperature = 21.97°C
The average kinetic energy of all of a substance's atoms or molecules is how we define a substance's temperature. A substance's particle's kinetic energy varies among its constituent parts. The distribution of the particles' kinetic energy can be used to depict it at any particular moment. Atoms and molecules move more quickly when more energy is added (heated), raising the temperature. The temperature drops as a result of the mobility of the atoms and molecules being reduced by the removal of energy (cooling). Temperature is a factor that affects the passage of heat when two bodies with differing temperatures are kept in close proximity to one another. It uses the kelvin SI unit (K).
Question:
The value of specific heat for copper is 390 J/kg⋅C∘, for aluminun is 900 J/kg⋅C∘, and for water is 4186 J/kg⋅C∘.
What will be the equilibrium temperature when a 235 g block of copper at 255 ∘C is placed in a 135 g aluminum calorimeter cup containing 825 g of water at 16.0 ∘C? Express your answer using three significant figures
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QUESTION 39 CH3CO2H is called acetic acid. The name implies that a. It does not react with either acids or bases. O b. It can donate an H+ ion to a base, and forms CH3CO2- c. It can react with acids, but does not react with bases. d. It can accept an H+ ion from a base, and forms CH3CO2H2+ Oe. It can donate an electron to a base, and forms CH3CO2H+
CH3CO2H is called acetic acid. The name implies that, the correct option is (b) i.e. It can donate an H+ ion to a base, and forms CH3CO2-.
By changing the autoionization equilibrium in water, base produce solutions with lower hydrogen ion activity than pure water, meaning the water has a pH value greater than 7.0 under normal circumstances. If a soluble base includes and releases OH ions in a quantitative manner, it is referred to as an alkali. Basic substances include metal oxides, hydroxides, and notably alkoxides, as well as conjugate bases of weak acids. Acids have the effect of increasing the hydronium (H3O+) concentration in water, whereas bases have the reverse effect. This is why bases and acids are viewed as chemical opposites. Since OH does react with H+ to generate water, this does contain aqueous hydroxides, making Arrhenius bases a subset of Brnsted bases. Aqueous solutions of ammonia (NH3) or its chemical compounds are examples of other Brnsted bases that receive protons (amines). Despite the fact that these bases lack a hydroxide ion, when they interact with water, the hydroxide ion concentration rises. Additionally, Brnsted bases are present in several non-aqueous solvents, which interact with solvated protons.
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URGENT.
Describe the electronegativity differences between the atoms involved in ionic polar covalent and nonpolar covalent bonds
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, ionic bond is polar and covalent bond is non polar.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water.
Ionic bond is formed by element whose difference in electronegativity is high, these are polar. Whereas, covalent bond is formed by element whose electronegativity difference is zero.
Therefore, ionic bond is polar and covalent bond is non polar.
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give the iupac name for the following compounds
Name each of the following chemicals using its IUPAC designation. ethyl 1,3 methyl 1,5 cyclohexane, 2-propyl three decane A4 heptane Dimethyl-7-hexane nonane
The longest chain of carbons in a molecule, whether it is a continuous chain or a ring, joined by a single bond, is named according to the IUPAC nomenclature system. All deviations, whether multiple bonds or atoms other than carbon and hydrogen, are identified by prefixes or suffixes in accordance with a particular set of priorities.
How can the IUPAC name be created from a structure?Yes! Search for all of your molecules by selecting the Explore Data tab and then clicking the green Search button at the bottom of the screen. Choose to display the IUPAC field from the Structure Fields section by clicking Customize your report. Click
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what is the emf generated by an pt-cu electrode pair in a 1 molar solution of ions at standard temperature? answer in volts.
Emf generated is 4.124 v by an pt-cu electrode pair in a 1 molar solution of ions at standard temperature
The average kinetic energy of all the atoms or molecules in a substance is what we refer to as the substance's temperature. Temperature decreases as a result of atoms and molecules' reduced motion as a result of removing energy (cooling). Fahrenheit, Celsius, and Kelvin are the three temperature scales currently in use.
E° cell = E° cathode- E° anode
= 1.2-(-2.924)
=1.2+2.924
=4.124 v
E° cell = 4.124 v
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Select the correct IUPAC name for the branched chain alkane. The name is: 3-propyl-S-ethyl-7-methyloctane 4-ethyl-6-ethyl-8-methylnonane 2-methyl-4,6-diethylnonane 4,6-diethyl-2-methylnonane
IUPAC name for the branched chain alkane.
Rule of IUPAC-
1) Longest chain as parent chain.
2) Numbering start from those side where more prior group present.
3) First written name of substituent then after written parent name.
4)If cyclic group present, then word 'cyclo' can be used.
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a sample prepared using the solvent and any other chemicals in the sample solutions, but not the absorbing substance
The refrence blank is the sample prepared using the solvent and any other chemicals in the sample solutions, but not the absorbing substance.
A square-shaped container, normally product of quartz, designed to preserve samples in a spectrophotometer is the cuvettes.
A dimension of the quantity of mild that passes via a pattern is transmittance.
A dimension of the quantity of mild this is taken in through a pattern is called absorbance.
A unit this is usually utilized in spectrophotometry this is inversely proportional to power and usually measured in nanometers is the wavelength.
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how many unique proton signals are seen in the h1 nmr spectrum of ethanol after shaking with d2o? number of unique proton signals:
After shaking with D₂O, the spectrum of ethanol shows two proton signals. The OH signals will no longer exist.
Three peaks may be seen in the ethanol 1H-NMR spectra. The following are the chemical shifts (Image 1).
The spectrum of ethanol after shaking with D₂O shows only two peaks. After shaking with D₂O, the peak that corresponds to OH disappears at this point. The following are the chemical shifts (Image 2).
At around 3.57 ppm, a water peak forms while the -OH resonance totally vanishes. This happens as a result of leftover H₂O and HOD in the D₂O bottle and traded out hydroxy protons (-OH), which now produce more H₂O.
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what are the percentage dissociations of h (g), o (g),and i (g) at 2000 k and a total pressure of 1 bar?
The percentage dissociation of H₂ is 0.0814%.
The percentage dissociation of O₂ is 0.0335%.
The percentage dissociation of I₂ is 94.6%.
The balanced chemical equation:
H₂(g)⇄2H(g)
ΔG0=2(106,760 J/mol)
-RT lnK=2*106,760 J/mol
-(8.3145 J/K/mol)(200 K) ln K=2*106,760 J/mol
Solving for K,
K=2.65*10^-6
On calculation, the percentage dissociation of H₂ is 0.0814%.
The balanced chemical equation:
O₂(g)⇄2O(g)
ΔG0=2(121552 J/mol)
-RT lnK=2*121552 J/mol
-(8.3145 J/K/mol)(200 K) ln K=2*121552 J/mol
Solving for K,
K=4.48*10^-7
On calculation, the percentage dissociation of O₂ is 0.0335%.
The balanced chemical equation:
I₂(g)⇄2I(g)
ΔG0=2(-29410 J/mol)
-RT lnK=2*-29410 J/mol
-(8.3145 J/K/mol)(200 K) ln K=2*(-29410) J/mol
Solving for K,
K=34.37
On calculation, the percentage dissociation of I₂ is 94.6%.
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Glucose (C6H12O6) is used as a source of energy by the human body. The overall unbalanced chemical equation is:
C6H12O6 + O2 → CO2 + H2O
Calculate the number of grams of oxygen gas needed to oxidize 12.5 g of glucose to carbon dioxide and water. (Remember that oxygen gas is a diatomic gas.)
Answer:
13.3 grams O2
Explanation:
Balance the equation first:
C6H12O6 + 6O2 → 6CO2 + 6H2O
Convert grams of glucose to moles:
12.5 g * (1 mol C6H12O6/180.155g) = 0.694 mol C6H12O6
Use ratio of oxygen gas to glucose to convert to moles of oxygen gas:
0.694 mol C6H12O6 * (6 mol O2/1 mol C6H12O6) = 0.416 mol O2
Convert moles of oxygen gas to grams:
0.416 mol O2 * (32.00g/1 mol O2) = 13.3 grams O2
Why is the enthalpy of formation of oxygen zero?
The enthalpy of formation of oxygen is zero because the enthalpy of formation any compound to form its elemental state is zero.
Here in this case, because oxygen is present in its elemental state it has zero enthalpy of formation because it does not require any energy to occur in a naturally occurring state.
Not only oxygen if any other compound is present in its naturally occurring state then it will have zero enthalpy of formation.
Because it does not require any amount of energy for any element to occur in its elemental state.
So, this is why we are concluding that because oxygen is present in its elemental state it has 0 enthalpy of formation.
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the strongest interaction between atoms listed below is (a) an instantaneous dipole-dipole interaction (b) a dipole-dipole interaction (c) a hydrogen bond (d) a covalent bond
what is meant by the term, mass transfer? select one: mass transfer refers to the change in molar mass of a substance in the presence of an indicator. mass transfer refers to the bonding of an indicator to the dissolved species in solution. mass transfer is the net movement of mass from one location to another.
The answer to the above question is D. as mass transfer refers to the net transfer of mass from one place to another.
What does "mass transfer" mean?One of the fundamental concepts in the study of transport phenomena is mass transfer, which denotes the movement of mass from one location to another. In multiphase systems, mass transfer may occur within a single phase or across phase borders. Although it can also be characterised in terms of solid-phase materials, mass transfer often incorporates at least one fluid phase (gas or liquid) in engineering challenges.
The computation of mass flux in a system and the distribution of the mass of various species through time and space are both made possible by the theory of mass transfer.
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the predominant greenhouse gas produced by human use of fossil fuels is __________.
Answer:
carbon dioxide
Explanation:
the carbon dioxide is bad for animals and can even harm the nature around us. Carbon dioxide is overall a non-safe gas for some animals and is used everyday.
if 5 mol no2 react with 1 mol h2o, how many moles of the excess reactant remains when the reaction is complete? 3 no2 h2o ⟶ no 2hno3
2 moles of NO2 remained after the reaction .
Why do moles appear on your body?Moles develop when melanocytes, skin cells, cluster together. Generally speaking, melanocytes are found all throughout the skin. The natural pigment and gives skin its color, melanin, is produced by them.
Briefing :
The balanced equation for the reaction is given below:
3NO2 + H2O —> NO + 2HNO3
Next, we shall determine the excess reactant. This is illustrated below:
From the balanced equation above,
3 moles of NO2 reacted with 1 moles H2O.
Therefore, 6.5 moles of NO2 will react with = (6.5 x 1)/3 = 2.17 moles of H2O.
From the above calculations, we can see that it will take a higher amount i.e 2.17 moles than what was given i.e 1 mole of H2O to react completely with 6.5 moles of NO2.
Therefore, NO2 is the excess reactant and H2O is the limiting reactant.
Next, we shall determine the number of mole of the excess reactant that reacted in the reaction. This is illustrated below:
From the balanced equation above, we can see that 3 moles of NO2 reacted with 1 mole of H2O.
Finally, we shall determine the leftover mole of the excess reactant after the reaction. This is illustrated below:
Given mole of NO2 = 5 moles
Reacted mole of NO2 = 3 moles
Leftover mole of NO2 =...?
Leftover mole = Given mole – Reacted mole
Leftover mole of NO2 = 5 – 3
Leftover mole of NO2 = 2 moles.
Therefore, 2 moles of NO2 remained after the reaction.
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both the codons uuu and uuc specify the amino acid phenylalanine. this is possible because the genetic code is __________. a. commaless b. non-overlapping c. degerate d. non-ambigous
Phenylalanine is indicated by the codons uuu & uuc. The degenerated genetic code makes this feasible.
What exactly does it mean to be a degenerate?adjective. If you label someone as degenerate, you are disapproving of them because you believe they have poor morals or standards of behavior. A bunch of vile computer hackers, to be exact. Synonyms include vile, base, corrupt, and fallen. Additional Degenerate Synonyms
How do you recognize degeneracy in something?If an energy level in quantum mechanics corresponds in two or more distinct observable states of the a quantum system, it is said to be degenerate. A quantum mechanical system is considered to be degenerate if two or more of its states have the same energy value when measured.
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