Out of all the compounds - ch2ch2 (Ethylene), ch3ch3 (Ethane)and hcch the compound with the shortest bond length is hcch (Ethyne)
Bond length is the equilibrium distance between the nuclei of two groups or atoms that are bonded to each other.
Bond length depends upon bond strength and is inversely proportional to it, therefore longer the length of bond, less the bond strength.
CH3-CH3 is Ethane, the C-C bond is a single bond.
CH2=CH2 is Ethylene, the C-C bond is a double bond.
CHCH is Ethyne, the C-C bond is a triple bond.
As we know, Bond length and bond strength gets shorter and stronger as the number of bonds between the two atoms increases. Here single bond has the largest bond length and triple has the shortest bond length.
So, in order of C-C bond length (longest to shortest) you have ethane > ethylene > ethyne
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you start with a flask at 900k containing only sulfur trioxide at an unknown pressure and allow the equilibrium below to be established. if the final sulfur trioxide pressure is 5.00 atm, what was its initial pressure? 2 so2 (g) o2 (g) <--> 2 so3 (g) kp
2so3 is the initial pressure that is seen to be used for the chemical reactions with flask 900k
what is pressure in a chemical reaction?
Pressure (P) is defined as the force of all the gas particle/wall collisions divided by the area of the wall: All gases exert pressure; it is one of the fundamental measurable quantities of this phase of matter.We can define pressure as: The force applied perpendicular to the surface of an object per unit area over which that force is distributed.The pressure of the gas is the force that the gas exerts on the container boundaries. The gas molecules move randomly along the given volume. During this movement, they collide with the surface and also with each other.A simple example of pressure may be seen by holding a knife to a piece of fruit. If you hold the flat part of the knife against the fruit, it won't cut the surface. The force is spread out of a large area (low pressure).Pressure is defined as force applied per unit area. Mathematically it is given by, P=FA. where F is the force acting perpendicular to the surface area A. The standard unit of pressure is the pascal (Pa), equivalent to one newton per meter squared (N/m 2 ).The rapid motion and collisions of molecules with the walls of the container causes pressure (force on a unit area). Pressure is proportional to the number of molecular collisions and the force of the collisions in a particular area. The more collisions of gas molecules with the walls, the higher the pressure.to know more about pressure follow
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what kind of compound would 5A and 7A make
In periodic table group 5A consist of nitrogen, phosphorus, arsenic and the group 7A consist of all the halogens.
What is periodic table ?The periodic table is a table form of chemical elements arranged according to atomic number, starting with hydrogen and ends to oganesson, which has the highest atomic number.
Because they are arranged in table form of the elements, it is known as the periodic table. They're present in rows and columns. Periods and Groups are the names given to the horizontal rows that comes from left to right and the vertical columns that comes from top to bottom.
Thus, Group 5A contain nitrogen, phosphorus , arsenic compounds while in group 7A contain all the halogens.
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hydrogen gas and nitrogen gas react to form ammonia gas. what volume of ammonia would be produced by this reaction if 2.9 ml of hydrogen were consumed?
On balancing the reaction of formation of ammonia we know that for every one mole of Nitrogen gas, we need three moles of Hydrogen gas to produce, two mole of the ammonia.
We are given with volume of Hydrogen gas i.e. 2.9 ml and are asked to determine the volume of ammonia
Since the volume of hydrogen is given as 2.9 ml = 2.9/1000 l
Mole of hydrogen =2.9/(22.4)(1000)
Mole of hydrogen = 0.129/1000 moles of H₂
Get the number of moles of NH₃
Number of moles of NH₃ = 2/3 of moles of Hydrogen
Number of moles of NH₃ = 2/3 * 0.129/1000 moles of H₂
Number of moles of NH₃ =0.0863/1000 moles of NH₃
Get the volume of ammonia NH₃
Volume of ammonia produced = 0.0863 * 22.4
Volume of ammonia produced = 1.933 ml
Hence the volume of ammonia that would be produced by this reaction if 2.9 ml of hydrogen were consumed is 1.933 ml
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24 points
Which two particles have opposite charges?
O A. lons and neutrons
B. Electrons and protons
OC. Neutrons and protons
OD. Electrons and neutrons
Answer:B
Explanation: according to the law of electrostatics it states that "unlike charge attract each other and like charges repel each other ".
quora what situations can you think of that compounding monthly will benefit you more than compounding continuously?
Daily compounding beats monthly compounding. The shorter the compounding period, the higher your effective yield is going to be.
When interest from the previous day is added, the interest earned each day on your savings account balance is known as daily compound interest. Any frequency plan, ranging from daily to yearly, can be used to compound interest. Interest is accrued daily and paid out monthly on all bank accounts from Marcus by Goldman Sachs. The formula for calculating monthly compounding is the principle amount multiplied by one plus the interest rate divided by a number of periods, which is raised to the power of the number of periods. Lenders frequently prefer to present interest rates compounded monthly instead of annually. The interest amount is obtained by deducting that sum from the principal amount.
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For a certain farming community in California, a water shortage is predicted if the average global temperature rises by 1 degree Celsius. The residents of this community rely on private vehicles powered by fuels for transportation because there is no public transportation system. Farm vehicles powered by diesel fuel are used to harvest crops and get them to market. Residents of the farming community want to reduce their impact on global temperature increases by reducing their carbon dioxide emissions. Residents of the farming community want to reduce their impact on global temperature increases by reducing their carbon dioxide emissions.
Choose the answers below that are true in regards to this scenario.
Question 2 options:
Residents of this community drive personal fuel-powered vehicles.
Farmers in this community use diesel-powered farm vehicles.
Residents in this community are NOT concerned about reducing their CO2 emissions.
The answers that are true in regards to the scenario above is:
Residents of this community drive personal fuel-powered vehicles.Farmers in this community use diesel-powered farm vehicles.So, the first and second options are correct. The third and last option is incorrect.
What is a community?A community is described as a social unit with commonality such as place, norms, religion, values, customs, or identity.
From the scenario above, we can conclude the following:
residents of the farming community want to reduce their impact on global temperature increases by reducing their carbon dioxide emissions. Residents of this community drive personal fuel-powered vehicles.Farmers in this community use diesel-powered farm vehicles.Learn more about vehicles at: https://brainly.com/question/26006107
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where was oxygen discovered?
Answer: nowhere from trees
Explanation:
2. after work-up, the product of the wittig reaction was recrystallized from hot isopropanol. you were told to do a gravity filtration using a heated stemless funnel if the solution appeared cloudy. what was the likely identity of compound that caused the cloudiness? it was also indicated that the filter should be washed with hot isopropanol if crystals started to form on the stemless funnel. why would hot isopropanol be used instead of cold isopropanol
The molecules of isopropyl alcohol do not stick collectively as strongly at room temperature as water molecules do, because of this the alcohol evaporates more quickly than water does.
DNA isn't soluble in ethanol, consequently, it will clump collectively and come to be visible. The colder the ethanol, the less soluble the DNA can be in it, which is why it's far critical for the ethanol to be kept bloodless.
Isopropyl Alcohol may also shape an ignitable vapor/air combination in closed tanks or boxes. Isopropyl Alcohol can react with AIR and OXYGEN over the years to shape unstable peroxides which can explode. Isopropyl Alcohol forms explosive combos, whilst heated, with ALUMINUM.
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a flask is filled with 1.65 moles of a gas at 26.1 k and 444.8 mm hg. the flask is then opened and additional 1.76 moles are added. the temperature of the flask is then changed to 281.1 k. what is the pressure (in atm) of the flask under these final conditions?
The pressure of the flask under these final conditions is 13 atm .
What are moles ?
The current SI definition of moles and the "new SI" draft definition will be reviewed. Current textbook treatments of moles are compared to these official definitions. From a historical perspective, in 1971 he reviews the treatment of moles and material quantities in textbooks before and after the introduction of these quantities in SI. Textbook definitions do not always match official definitions, but reflect common usage by chemists. This is because when the new SI is adopted, the textbook definition will likely be closer to the official definition, and the draft definition more closely matches what is found in many textbooks than the current official definition. However, SI-based quantities of substances are likely to continue to cause problems for chemistry teachers and, if retained, are largely ignored by chemistry practitioners.
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(c) Lithium oxide is an ionic compound.
Draw a dot and cross diagram to show how lithium and
oxygen combine to form lithium oxide.
Only show the electrons in the outer shell of each
atom.
Give the charges on the ions formed.
Answer:
Let us know formula and denotion for Lithium oxide is Li2O.
Explanation:
While on the basis of Electronic configuration:
Lewis structure(for Lithium atom)-Li•
For Oxygen atom- it is 6 dots in the Word O(for Oxygen) but is needed to paired in a pair(of two dots if possible) by the use of either all sides where two dots are presented two sides While one dot is represented on other two sides.
When we come across we might have a simple question how and why the Lithium oxide is Li2O
So,as we know Li(have one electron in its outermost shell),written as Li^+/+1 While Oxygen requires 2 more electrons to stabilize its valency,so it written as O^-2/2-
On combining,Li^+ & O^-2
Exchange and crossing up of valency is done forming Li2O.
Do check the image uploaded for better clarity and understanding.
if a certain gas has a density of 2.34 g/l at 27.0c and 742 torr, calculate the molar mass of this gas
The molar mass of this gas is 59.0 g/mol.
Molar mass is described as the mass in grams of 1 mole of a substance. The gadgets of molar mass are grams in keeping with mole, abbreviated as g/mol. The mass of an unmarried isotope of any given detail (the isotopic atomic mass) is a cost concerning the mass of that isotope to the mass of the isotope carbon-12.
Calculation:-
PV = nRT
P = 742 torr = 0.976 atm
P × molar mass = density × R × T
0.976 * molar mass = 2.34* 0.0821*300
0.976 * molar mass = 57.6
molar mass = 59.0 g/mol
Therefore, the molar mass = 59.0 g/mol
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which of the following changes occur when an acid solution of unknown concentration is titrated with a standardized solution of naoh? select all that apply. multiple select question. the color of the indicator slowly changes over the course of the titration. the ph of the acid solution decreases. the concentration of h ions in the acid solution decreases. the ph of the acid solution increases.
The colors of the starting solutions differ in case of high and low concentrations, because the titrations start at different pH values.
The colors of the starting solutions vary in case of high and coffee concentrations, due to the fact the titrations start at distinctive pH values. In case of excessive concentrations, the starting color is of brilliant pink red, converting to purple orange all through innovative titration.
The signs have a chemical structure which can soak up mild beneath positive pH conditions and both change shade or grow to be colorless below other pH situations. This normally happens because of a exchange in protonation of the purposeful group of the molecule.
Whether an answer is acidic or simple can be measured at the pH scale. When everyday indicator is brought to a solution, the color change can indicate the approximate pH of the solution. Acids purpose universal indicator option to trade from green in the direction of crimson.
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an experiment called for l of sulfur dioxide, , at and atm. what would be the volume of this gas at and atm?
since you have Sulphur dioxide in the experiment . Use Charles' Law, to know the volume [tex]V 1 /T 1 = V 2/ T 2[/tex]
what is the volume of the gas ?
The volume of gas is defined as the space occupied by the gaseous particles at standard temperature and pressure conditions. It is denoted as 'V'. The SI unit of volume is 'Litres' denoted as 'L'. A mole of gas has a volume at room temperature.Boyle's Law - states that the volume of a given amount of gas held at constant temperature varies inversely with the applied pressure when the temperature and mass are constant.Volume = length x width x height.You only need to know one side to figure out the volume of a cube.The units of measure for volume are cubic units.Volume is in three-dimensions.You can multiply the sides in any order.Which side you call length, width, or height doesn't matter.The volume of a gas is directly proportional to its temperature when pressure is constant. The ratio of volume to temperature is constant when pressure is constant. This relationship is known as Charles' law or Gay-Lussac's law .to know more about volume of the gas follow
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How does the atomic radius change as you move left to right in Period 3 from aluminum through chlorine? Refer to the periodic table.
A. it generally increases.
B. it does not change.
C. it generally decreases.
D. it varies unpredictably.
Answer:
C it generally decrease
Explanation:
Atomic radius of an element decrease from left to right of the periodic table
Sodium can combine with element "X" so that
the chemical formula is Na₂X. What element
could element "X" be?
A)Phosphorus
B)Helium
C)Magnesium
D)Sulfur
The element could be X is phosporus .
What is element?
An element is the fundamental item that can't be easily broken onto smaller of pieces. In chemistry and physics, an elementary is a substance that can't be broken down by non-nuclear reactions. In computing and the mathematics, an element is the distinct piece of a larger system or set.
Sol-An ionic compound is formed by the ions, which their charges replaced, so the compound Na₂X is formed by the ions Na⁺ and X⁻². Thus, X must gain two electrons to be stable at the octet, so it has 6 valence electrons. Because it can accommodate up to 12 electrons, the elememts expands the octet, do it must be in the 3rd period or higher.
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what is the common characteristic of the electron configurations of the elements ne and ar? in which group would you find them?
Common characteristic of the electronic configuration of neon and argon have is their complete outer shell.
Neon (10) - 1s2, 2s2, 2p6
Argon (20) - 1s2, 2s2, 2p6, 3s2, 3p6
as we can see both the configurations have an complete outer shell means their octet is complete. This is the common characteristic of both the elements.
The both of them lie in group 8A that is the noble gases or inert gas.
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Physical change involves a change in composition.
True
False
A physical change does indeed involve a change in composition. Hence,t the given statement is true.
A physical change is one in which the form of the matter is altered but this does not mean it transforms into another. By composition, we refer to the size and the shape of the matter which is altered after a physical change occurs.
A physical change is reversible. This means that even though the shape and size of the matter change completely, it can always be reverted back to how it was by applying all the conditions that were present there before.
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it is quite possible to have a positive reaction in a glucose carbohydrate broth and yet a negative reaction in a glucose use methyl red test. this is due to:
This is due to the methyl-requiring acid produced.
Methyl red test is considered positive when the culture medium turns red after the addition of methyl red, because of a pH at or below 4.4 from the fermentation of glucose.
methyl red test is considered negative when the culture medium gives yellow colour after the addition of methyl red.
when the bacteria are grown in a broth medium containing glucose .if the bacteria has the ability to utilise glucose with the production of a stable acid,
the colour of methyl red changes from yellow to red when added to broth culture.
In glucose carbohydrate broth 4 mol of acids,1 mole of ethanol, and 1 mol of CO2 are produced. the large quantity of acid produced causes a significant decrease in pH which gives red colour as a result.
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the reaction between copper and silver nitrate produces beautiful silver flakes and a bright blue copper (ii) nitrate solution according to the following reaction: cu 2agno3 2ag cu(no3)2 how many moles of agno3 will be needed to completely react with 10.0 g of cu?
0.3147128245 moles of AgNO₃ will be needed to completely react with 10.0 g of Cu.
Determine the number of moles of copper by dividing its mass by its molar mass.
moles Cu = mass Cu / MM Cu
moles Cu = 10.0 g/ 63.55 g/mol
moles Cu = 0.1573564123
Based on the balanced chemical reaction between copper and silver nitrate, 1 mole Cu needs 2 moles AgNO₃ to proceed with the reaction completely.
Cu + 2AgNO₃ ⇒ 2Ag + Cu(NO₃)₂
If there are 0.1573564123 moles Cu, then 0.3147128245 moles AgNO₃ is needed.
moles AgNO₃ = 0.1573564123 moles Cu(2 moles AgNO₃ / 1 mole Cu)
moles AgNO₃ = 0.3147128245
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what three flaws of the traditional periodic table does jeff moran feel he has addressed with his periodic spiral
The three major flaws addressed by Moran's periodic spiral are:
1) Since hydrogen possesses distinct attributes that set it apart from every other element in the table, it effectively does not belong to any of the table's 18 columns.
2) The lanthanides and actinides, which are the elements from each period of the f block, have comparable properties but are not shown in columns in the table.
3) The column-and-row layout of the periodic table hides the continuity between the pieces, which is better represented by an a spiral.
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when energy-depleted elements associated with a proton are accepted by an organic molecule, the process is called
When energy depleted elements associated with a proton are accepted by an organic molecule the process is called Fermentation.
Fermentation is a metabolic process that causes a chemical change inside body by the actions of enzymes.
The main purpose of fermentation is to generate NAD+ and 32 ATP in the presence of oxygen.
Fermentation allows cells to survive without using ATP.
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An alloy of bronze was made by combining 88 % copper and the rest is composed of tin. Determine the density of the bronze sample using a weighted average.” 8.76g/cm
Based on the densities and percent mass of copper and tin, the density of Bronze is 8.76 g/cm³.
What is density?Density is the ratio of the mass and volume of a substance.
Density = mass/volumeFor a mixture, the density of the mixture is the weighted average of the densities of the substance in the mixture.
The density of the bronze is calculated as follows;
The density of bronze = percent mass of copper * density of copper + mass of tin * density of tinThe density of copper = 8.96 g/cm³
Percent mass of copper = 88%
The density of tin = 7.3 g/cm³
Percent mass of tin = 12%
The density of Bronze = 88% * 8.96 + 12% * 7.3
The density of Bronze = 8.76 g/cm³
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4.why benzoic acid showed a smaller rf value than 9-fluorenone in the tlc result? explain thoroughly for full credit.
Benzoic acid showed a smaller rf value than 9-fluorenone in the TLC result because of its different attraction phase, stationary phase, and mobile phase.
The Rf esteem depends on the stationary stage and portable stage of the TLC plate. The Rf esteem of a compound changes based on how pulled it is to the stationary and versatile stages.
As a rule, the stationary stage is silica gel, which is very polar, so the versatile stage is moderately non-polar.
Benzoic corrosive is moderately polar since it incorporates a carboxylic corrosive bunch. So, it would have a moo Rf value on a TLC plate with silica gel as the stationary stage and hexane as the versatile stage.
The Rf esteem on a TLC plate with silica gel as the stationary stage and 60:40 hexane: ethyl acetic acid derivation as the versatile stage.
The benzoic corrosive would be more pulled into the generally polar 60:40 hexane: ethyl acetic acid derivation than the non-polar hexane portable stage.
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why is the extrapolation method for determining the titration end point is more accurate than finding the minimum conductivity
Extrapolation method for determining the titration end point is more accurate than finding the minimum conductivity because there is no human error when calculating as there could be with doing the actual experiment
Extrapolation is the estimating an unknown value based on extending a known sequence of values and to extrapolate is the infer something not explicitly stated from existing information and the point at which the indicator changes color is called as endpoint and so the addition of an indicator to the analyte solution help us to visually spot the equivalence point in an acid base titration and the endpoint refer to the point at which the indicator changes color in and acid base titration
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Identify the following as metals, nonmetals or metalloids using the periodic table.
a. Silicon
b. fluorine
c. uranium
d. mercury
e. arsenic
f. iridium
14.what volume, in milliliters, of 6.0 m naoh is needed to prepare 175 ml of 0.20 m naoh by dilution?
5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.
Dilution is the process of “lowering the concentration of a solute in a solution by simply adding more solvent to the solution, such as water.” Diluting a solution enables adding more solvent without adding more solute.
into formula to find out the volume is ;
[tex]V_{1}[/tex][tex]N_{1}[/tex] = [tex]V_{2}N_{2}[/tex]
where [tex]V_{1}[/tex]= ?
[tex]V_{2}[/tex] = 175ml
[tex]N_{1}[/tex] = 6
[tex]N_{2}[/tex] = 0.2
So, ⇒ [tex]V_{1}[/tex]×6 = 175×0.2
[tex]V_{1}[/tex] = 5.83 ml
So, 5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.
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Which structure is the arrow pointing to?
What is the function of this organelle?
The structure the arrow is pointing to is the nucleus and it helps store genetic material (DNA) in living cells.
What is an organelle?Organelle is a specialized structure found inside cells that carries out a specific life process. examples are ribosomes, vacuoles, nucleus etc.
The nucleus is the large membrane-enclosed organelle found in eukaryotic cells which contains genetic material.
The nucleus is located at the center of living cells and it functions to store genetic material called DNA. The DNA is transferred to offsprings for inheritance of traits.
According to this question, a microscopic image of a cell is shown. The arrow pointed to the nucleus of the cell.
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the standard gibbs free energy of formation of is zero. (a) h2o(l) (b) k(s) (c) cl2(g) the standard gibbs free energy of formation of is zero. (a) (b) (c) (a) only (b) only (c) only (b) and (c) (a), (b), and (c)
The standard Gibbs free energy of formation of is zero are option (b) K(s) and (c) Cl₂(g).
Gibbs free energy may be more than zero, much less than zero, and identical to zero. If Gibbs free energy is more than zero the response is a nonspontaneous reaction. If Gibbs free energy is less than zero the reaction is a spontaneous reaction.
The usual Gibbs free energy of formation of a compound is the exchange of Gibbs unfastened energy that accompanies the formation of 1 mole of that substance from its issue elements, of their well known states.
Gibbs free energy, G is a price that defines how spontaneous a response is, with a poor fee which means the reaction is spontaneous, and a advantageous cost that means the reaction is nonspontaneous. This fee is the combination of enthalpy and entropy.
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2
A student observed a sperm cell using a microscope at a
magnification of x400.
The sperm cell image measured 22 mm long.
Use the equation to calculate the real size of the cell.
Give your answer in micrometres (μm).
size of image
size of real object
219) 3120 20 2019) ST220M
magnification =
A student observed a sperm cell using a microscope at magnification of x400 and sperm cell image measured 22 mm long then the actual size is = 55 μm.
What is microscope and magnification?A simple microscope produces an image of the object upon which the microscope is focused whereas magnification is the ability to make small objects seem larger such as making a microscopic organism also visible. Ability to distinguish two objects from each other is called as resolution
As we know that, 1 mm = 1000 μm.
So, 22mm = 22000 μm
Magnification of x400 given
We can calculate, Actual size = image size / magnification.
= 22000/400
Actual size = 55 μm
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ammonia (nh3) chemically reacts with oxygen gas to produce nitric oxide and water. what mass of nitric oxide is produced by the reaction of 2.81 g of ammonia?
The mass of nitric oxide produced by the reaction of 2.81 grams of ammonia is 1.59 grams.
The equation for the reaction of ammonia and oxygen to produce Nitric oxide and water is,
4NH₃ + 5O₂ → 4NO + 6H₂O
From the reaction we can see,
4 moles of ammonia = 4 moles of nitrix oxide.
Mole of ammonia = moles of nitric oxide.
Moles = reacted/formed mass/ molar mass
Molar mass of ammonia = 17 g/mol.
Molar mass of nitric oxide = 30 g/mol.
Mass of ammonia reacted = 2.81 grams.
Putting values,
2.81 x 17 = Formed mass of nitric oxide x 30
Formed mass of nitric oxide = 1.59grams.
The mass of nitric oxide formed is 1.59 grams.
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