We know that the molar mass of ammonia is 17.03 grams per mole. This means that 1 mole of ammonia will have a mass of 17.03 grams.
The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units that the magnitude is expressed in. We are given that we have a 2.00 mole sample of ammonia. This means that we have 2 times the amount of ammonia that we would have in a 1.00 mole sample.
To find the mass of our sample, we need to multiply the number of moles by the molar mass. This gives us :-
2.00 moles * 17.03 grams/mole = 34.06 grams
Therefore, our sample of ammonia has a mass of 34.06 grams.
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Name the best method to separate camphor and sand?
Answer:
sublimation
Explanation:
EASY PLEASE HELP !!!!!!
Answer: B.) Salt and water
Explanation: A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water.
Hope this helps :)
Answer:
B. Salt and water
Explanation:
have a nice day!!
Aqueous sodium phosphate and aqueous magnesium chloride are mixed together in a beaker and react to produce solid magnesium phosphate and aqueous sodium chloride.
The reaction between Aqueous sodium phosphate and aqueous magnesium chloride is a D. Double displacement reaction.
What is a double displacement reaction ?In this type of reaction, the cations and anions of two different compounds switch places to form two new compounds. In this case, the aqueous sodium phosphate (Na3PO4) contains the cation Na+ and the anion PO43-, while the aqueous magnesium chloride (MgCl2) contains the cation Mg2+ and the anion Cl-.
When these two compounds are mixed, the cations and anions switch places to form solid magnesium phosphate (Mg3(PO4)2) and aqueous sodium chloride (NaCl).
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The full question is:
Aqueous sodium phosphate and aqueous magnesium chloride are mixed together in a beaker and react to produce solid magnesium phosphate and aqueous sodium chloride.
What kind of reaction is this?
Decomposition reaction
Single displacement
Combustion reaction
Double displacement reaction
How to use system and habitable in a sentence
Answer:
The farthest habitable spot to the south The whole distribution system broke down.
Explanation:
A sample of helium gas has a volume of 6.50l at a pressure of 845 mmhg and a temperature of 25oc. what is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to 1850 ml and 325 k
Answer:
4.25atm
Explanation:
\(\frac{P1V1}{T1}\\\)=\(\frac{P2V2}{T2}\)
where ,
p1 =845/760=1.11atm
v1=6.50l
t1=25c +273k=298k
p2=?
v2=1850/1000=1.85l
t2=325k
so answer is 4.25 atm
Which of the following molecules shows two atoms of hydrogen (H)? (1 point)O 2H₂OO 2CHAO HO₂O H₂SO4
Explanation:
H2O:
2 H2O shows 2 atoms of hydrogen. The number 2 in front of it means 2 moles of H2O
----------
CHA:
It only shows 1 atom of hydrogen
1 CHA means 1 mole of CHA
2 CHA means 2 moles of CHA
----------
HO2:
It only shows 1 atom of hydrogen
---------
H2SO4:
It shows 2 atoms of hydrogen
Answer:
H2O
H2SO4
explain how you would find the number of moles that are rpresented by a certaib nunver if reoresnetatuce oartuckes
To find the number of moles represented by a certain number of particles, you can use Avogadro's number and the concept of molar mass.
Avogadro's number (symbolized as N<sub>A</sub>) is a fundamental constant that represents the number of particles (atoms, molecules, ions, etc.) in one mole of a substance. It is approximately equal to 6.022 × 10²³ particles/mole.
Molar mass is the mass of one mole of a substance and is expressed in grams/mole. It represents the sum of the atomic masses or molecular masses of the constituent particles in a substance.
To calculate the number of moles, you can follow these steps;
Determine the number of particles you have (atoms, molecules, ions, etc.).
Identify the molar mass of the substance or the average molar mass if it's a mixture.
Divide the number of particles by Avogadro's number to convert them into moles. The formula is:
Moles = Number of Particles / Avogadro's number
Moles = Number of Particles / (6.022 ×10²³ particles/mole)
The result will give you the number of moles represented by the given number of particles.
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--The given question is incorrect, the correct question is
"Explain how you would find the number of moles that are represented by a certain number of representative particles."--
a mixture of nitrogen and hydrogen gas is compressed from a volume of to a volume of , while the pressure is held constant at . calculate the work done on the gas mixture. be sure your answer has the correct sign (positive or negative) and the correct number of significant digits.
The work done on the gas mixture is 297KJ.
W = -Pext(Vf-Vi)
P = 61.0 atm
Vi = 99.0 L
Vf = 51.0 L
put values in above expression
W = -Pext(Vf-Vi)
W = -61.0atm (51.0L - 99.0L)
W = 2928 atm.L
W = 2928 *101.33 J
W = 296694 J
W = 296.7 KJ
W = 297 KJ
In physics, work is the energy transferred to or from an item through the application of pressure alongside displacement. In its most effective form, for a consistent pressure aligned with the route of motion, it equals the manufactured from the force strength and the space traveled.
Work modifications the quantity of mechanical and internal energy possessed by gadgets. Whole work is achieved on a machine or item, energy is introduced to it.
The character of the work achieved can be categorized into three classes. they are +ve work, -ve work, and zero work. The character of work relies upon the perspective of pressure and displacement.
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Decide which intermolecular forces act between the molecules of each compound in the table below.
Answer
• Hydrogen bromide: dispersion and dipole-dipole
,• Bromine: dispersion
,• Hypochlorus acid : dispersion, dipole-dipole, hydrogen bond
,• Molecular oxygen: dispersion
Procedure
The London dispersion force is a temporary attractive force that results when the electrons are in two adjacent atoms. These are the weakest intermolecular forces and exist between all types of molecules, whether ionic or covalent—polar or nonpolar.
Dipole-dipole: occur between polar molecules when the partially positively charged part of a molecule interacts with the partially negatively charged part of another molecule.
A hydrogen bond: is a special kind of dipole-dipole interaction that occurs specifically between a hydrogen atom bonded to an oxygen, nitrogen, or fluorine atom.
Based on the previous:
Hydrogen bromide: dispersion and dipole-dipole
Bromine: dispersion
Hypochlorus acid : dispersion, dipole-dipole, hydrogen bond
Oxygen: dispersion
How does dermal tissue play a key role in transpiration?
Answer:
Dermal tissue of the stems and leaves is covered by a waxy cuticle that prevents evaporative water loss. Stomata are specialized pores that allow gas exchange through holes in the cuticle. Unlike the stem and leaves, the root epidermis is not covered by a waxy cuticle which would prevent absorption of water.
Explanation:
Calculate the current needed to provide 30000C of electricity In 5 minute
If 24k gold is the highest purity (100%), then a 6 Karat piece of gold jewelry would contain what percentage of gold?
Answer:
25% gold.
Explanation:
6 is 25 percent of 24, so 6 karat gold would be 25% gold.
what is the process that duplicates dna called
Answer:
Replication
Explanation:
I remember learning this in class. The DNA duplicate process is called Replication; it involve the identical helices of DNA to create two identical molecules of DNA. If I am wrong, I am sorry it has been a long time since I learned this.
in the electrochemical cell ni(s) | ni²⁺(1 m) || h⁺(1 m) | h₂(1 atm) | pt(s), which change will cause e of the cell to decrease?
The electrochemical cell given is a standard hydrogen electrode (SHE) coupled with a nickel electrode. Any change that decreases the potential of the nickel electrode or the standard electrode potential of the SHE will cause the E°cell of the cell to decrease.
The notation used to represent the cell is \(Ni(s) | Ni^{2} (1 M) || H+(1 M) | H^{2} (1 atm) | Pt(s).\)In this notation, the double vertical lines (||) represent the boundary between the two half-cells of the cell, and the single vertical line (|) represents the phase boundary between the electrode and the electrolyte.
The standard cell potential (E°cell) of the cell is calculated using the Nernst equation: E°cell = E°cathode - E°anode, where E°cathode and E°anode are the standard electrode potentials of the cathode and anode, respectively.
In this case, the nickel electrode is the cathode and the SHE is the anode. The standard electrode potential of the SHE is defined as 0 volts by convention, so the E°cell of the cell is determined solely by the standard electrode potential of the nickel electrode, which is +0.25 volts.
If any change is made to the cell that decreases the potential of the nickel electrode, the E°cell of the cell will decrease. One possible change that could cause this is the addition of a stronger oxidizing agent than Ni2+ to the Ni2+ solution, which would result in the oxidation of nickel ions to nickel atoms.
This would decrease the concentration of Ni2+ ions in solution and shift the equilibrium towards the reactants, Ni(s) and Ni2+(1 M). This would cause the potential of the nickel electrode to decrease, and hence the E°cell of the cell would also decrease.
Another possible change that could decrease the potential of the nickel electrode is the increase in the concentration of H+ ions in the acidic electrolyte. This would increase the activity of the H+ ions and shift the equilibrium towards the reactants, H+ and H2. As a result, the potential of the SHE would decrease, and hence the E°cell of the cell would also decrease.
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Valdez notices that a wooden door in his house is difficult to open in the summer, but not in the winter. Valdez explains to Tony that the temperature of the door changes throughout the year. Tony says there is no way to measure the temperature of a solid because solids do not have a lot of thermal expansion. Valdez disagrees. Develop an argument supporting or opposing Tony's claim. Support your argument with at least two pieces of evidence.
I would argue against Tony's claim that the temperature of a solid cannot be measured, just because solids do not have a lot of thermal expansion.
What is thermal expansion?Thermal expansion is the tendency of materials to change in size, shape, or volume in response to changes in temperature.
There are several ways to measure the temperature of solids. One common method is to use a thermometer, which can be inserted into the solid to measure its temperature. Another method is to use an infrared thermometer, which measures the temperature of a solid by detecting the amount of infrared radiation it emits.
Second, while it is true that solids have a lower coefficient of thermal expansion than liquids or gases, they still expand and contract with changes in temperature. This is evident in Valdez's example of the wooden door, which becomes difficult to open in the summer when the temperature is higher, and easier to open in the winter when the temperature is lower. This change in the size of the door is due to thermal expansion and contraction of the wood.
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URGENT! Please help! Hi, I have to do a titration lab report using the Royal Society of Chemistry online titration lab. Please help me answer the following questions using the observation table I think?
Answer:
I'm sorry, but I cannot see the observations or the data table you mentioned in your question. However, I can still provide you with some general guidance on how to approach the calculations and answer the questions based on the given information.
4. To calculate the concentration of the NaOH solution, you need to know the mass of NaOH used and the volume of the solution. The formula to calculate concentration is:
Concentration (in mol/L) = (Mass of NaOH (in grams) / molar mass of NaOH) / Volume of solution (in L)
Make sure to convert the mass of NaOH to moles by dividing it by the molar mass of NaOH. The molar mass of NaOH is the sum of the atomic masses of sodium (Na), oxygen (O), and hydrogen (H).
5. The balanced equation for the neutralization reaction between NaOH and HCl is:
NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
(aq) represents an aqueous solution, and (l) represents a liquid.
6a. To calculate the average concentration of HCl in the sample from site B, you need to know the volumes and concentrations of the NaOH and HCl solutions used in the titration. Use the formula:
Concentration of HCl (in mol/L) = (Volume of NaOH solution (in L) * Concentration of NaOH (in mol/L)) / Volume of HCl solution (in L)
Multiply the volume of NaOH solution used by its concentration to find the amount of NaOH used. Then, divide this amount by the volume of HCl solution used to find the concentration of HCl.
6b. To determine the pH of the water at site B, you need to know the concentration of HCl from the previous calculation. The pH can be calculated using the formula:
pH = -log10[H+]
Since HCl is a strong acid, it dissociates completely into H+ ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl. Take the negative logarithm (base 10) of the H+ concentration to find the pH.
To check if the water is safe, compare the calculated pH value to the range provided (pH 4.5-7.5). If the pH falls within this range, the water is considered safe for plant and animal reproduction in an aquatic environment.
6c. Use a similar calculation as in 6a to determine the average concentration of HCl in the sample from site C.
6d. Use the concentration of HCl from 6c to calculate the pH using the formula in 6b. Follow the same procedure to check if the water is safe based on the pH range.
7. To find the most current pH value for the Grand River, you can search for the latest data from reliable sources such as environmental agencies, research institutions, or government websites. Compare this pH value to the pH values obtained in the experiment to assess the difference between them.
Remember, without the specific data and observations, the calculations and comparisons provided here are only general guidelines. It's important to use the actual data from your experiment to obtain accurate results and conclusions.
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HELP PLEASE 40.0 grams of salt are dissolved in 100. grams of water. The solution is how many grams?
Answer:
The mass of the solution is 140 grams.
Explanation:
The mass of the solution is given by the sum of the solute's mass and the solvent's mass:
\( m_{sol} = m_{ste} + m_{svt} \)
Where:
\( m_{sol} \): is the mass of the solution
\(m_{ste}\): is the mass of the solute
\(m_{svt} \): is the mass of the solvent
The solute is the salt (40.0 g) and the solvent is the water (100 g), so:
\( m_{sol} = m_{ste} + m_{svt} = 40 g + 100 g = 140 g \)
Therefore, the mass of the solution is 140 grams.
I hope it helps you!
i/3 of 12 = 2/3 of
please help at 11 o'clock am it needs to be done
Answer:
6
Explanation:
This question is seeking for an equivalent of one expression. The first expression says 1/3 of 12, which means 1/3 × 12 = 4. To find 2/3 of a number that will give us 4, we say
Since; 1/3 of 12 is 4
Then, 4 = 2/3 of x, where x is the number, which when multiplied by two-third (2/3) will result to 4.
4 = 2/3 × x
4 = 2x/3
Cross multiply
2x = 3 × 4
2x = 12
x = 12/2
x = 6.
This means that; 1/3 of 12 = 2/3 of 6
in what form do newly synthesized fatty acids primarily exist?
Newly synthesized fatty acids primarily exist in the form of acyl carrier protein (ACP)-bound intermediates.
During fatty acid synthesis, the growing fatty acid chain is covalently bound to ACP, which serves as a carrier molecule for the elongation cycle. ACP is a small protein that contains a 4'-phosphopantetheine (4'-PP) prosthetic group, which acts as an acyl carrier arm.
The fatty acid intermediates are covalently attached to the 4'-PP group through a thioester bond, allowing for the transfer of the growing fatty acid chain between the active sites of the fatty acid synthase complex.
Once the fatty acid chain is fully elongated, it is released from ACP and can be further modified or incorporated into complex lipids. Therefore, the ACP-bound intermediates are the primary form of newly synthesized fatty acids in the cell.
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Draw the structural formula (not the skeletal formula) for 2-octene.
Answer:
Explanation:
2-octene is a structural isomer of octene. Octene is an unsaturated hydrocarbon (alkene) with 8 carbon atoms. The structural formula of 2-octene is seen below
H H H H H H
I I I I I I
H- C - C = C - C - C - C - C - C - H
I I I I I I I I
H H H H H H H H
The structural formula of 2-octene is different from that of octene in the sense that, it's double bond is found in between the second and the third carbon (on the second bond position).
Which describes why governmental funding for scientific research is important?
Governmental funding for scientific research is essential in advancing our understanding of the world and improving our way of life.
There are several reasons why governmental funding for scientific research is important:1. Scientific research has been a critical component of advancing society. It has helped us to develop new technologies, find cures for diseases, and understand complex systems.2. Governmental funding helps to ensure that scientific research is unbiased and can be conducted without conflicts of interest. This is particularly important when research is being conducted on topics that have the potential to impact public policy.3. Governmental funding is often necessary for scientific research to be conducted at all. This is especially true for basic research, which is research that is conducted to increase our understanding of a topic without a specific goal in mind. Basic research is often not profitable for private industry, so governmental funding is necessary to ensure that it is conducted.4. Scientific research often requires expensive equipment and resources, which can be difficult for individual researchers or small organizations to afford. Governmental funding can help to provide these resources, allowing researchers to conduct more in-depth studies.Governmental funding for scientific research has been instrumental in advancing our understanding of the world and improving our way of life. Without it, many of the technological and medical advancements that we take for granted today would not exist.
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in the formula k = 0.693/t1/2, k is the decay constant. true false
The given formula is true, in the formula k = 0.693/t₁/₂, k is the decay constant for radioactive decay.
The formula itself is a derivation of the relationship between decay constant, half-life, and the rate of radioactive decay. The constant "0.693" is a numerical value derived from the natural logarithm and is used to calculate the decay constant when the half-life of a substance is known.
This formula is derived from the half-life concept, where t₁/₂ represents the time it takes for half of a radioactive substance to decay.This concept is quite common in nuclear physics and it describes how quickly atoms would undergo radioactive decay. Moreover, it could also mean how long atom would survive radioactive decay.
The decay constant, k, is a value that helps describe the rate at which the substance decays over time.
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Calculate the normal freezing point of a 0.7439 mol aqueous solution of c12h22o11 that has a density of 1.35g/ml. The molal freezing point depression constant of water is 1.86 kg/mole
Answer:
Freezing point of solution = -2.740C
Explanation:
The solution is attached herewith
The normal freezing point of an aqueous solution of C₁₂H₂₂O₁₁ is -1.26°C
The freezing point depression can be calculated using the formula:
ΔTf = i* Kf*m ; where
i = van’t Hoff factorKf = freezing point depression constantm = molalility of solutionThe molality of the aqueous solution of C₁₂H₂₂O₁₁ is first determined using the formula:
molality = moles of solute/mass of water in kgThe mass of water is unknown but is determined from the mass of the solute and solution from the formula:
mass of solvent (water) = mass of solution - mass of solutemass of solute = number of moles * molar mass
moles of solute in 1 L solution = 0.7439 moles
molar mass of solute, C₁₂H₂₂O₁₁ = 342.0 g/mol
mass of solute = 0.7439 moles * 342.0 g
mass of solute = 254.41 g
mass of solution = density * volume
volume of solution = 1 L = 1000 mL
mass of solution = 1.35g/ml * 1000 mL
mass of solution = 1350 g
Therefore, mass of solvent (water) = 1350 g - 254.41 g
mass of solvent (water) = 1095.59 g
mass of solvent (water) in kg = 1095.59 g * 1 kg/ 1000 g
mass of solvent (water) in kg = 1.0956Kg
Thus, molality of solution = 0.7439 moles / 1.0956 Kg
molality of solution = 0.679 mol/kg
The freezing point depression, ΔTf, is then determined using the formula: ΔTf = i* Kf*m
Since C₁₂H₂₂O₁₁ is a non-electrolyte; i for C₁₂H₂₂O₁₁ = 1
Kf of water = 1.86 kg/mole
m = 0.679 mol/kg
ΔTf = 1 * 1.86 * 0.679
ΔTf = 1.26 °C
Therefore, freezing point depression, ΔTf = 1.26 °C
normal freezing point of solution = freezing point of water - freezing point depression
normal freezing point of solution = 0.0°C - 1.26°C
normal freezing point of solution = -1.26°C
Therefore, the normal freezing point of an aqueous solution of C₁₂H₂₂O₁₁ is -1.26°C
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A sealed flask contains neon, argon, and krypton gas. If the total pressure in the flask is 3. 782 atm, the partial pressure of Ne is 0. 435 atm, and the partial pressure of Kr is 1. 613 atm, what is the partial pressure of Ar?
Multiple choice question.
A)
The partial pressure of argon is 1318 torr.
According to the question, the total pressure is given and the pressure of individual gases is given and we have to find out the partial pressure of Ar.
The ratio of the partial pressure of a given gas to the overall pressure exerted by the gaseous mixture is the mole fraction of that gas in a mixture of gases. When the entire number of moles in the mixture is known, this mole fraction can also be used to determine the total number of moles of a constituent gas.
Now, According to the Dalton's law of partial pressure is that the total partial pressure in the container is the sum of the partial pressure of all the gases in the container.
total pressure in the flask=3.782atm
the partial pressure of the Ne=0.435atm
the partial pressure of Kr =1.613atm
\(P_{T}=P_{Ar}+ P_{Ne}+P_{K}\)
put the value in the equation,
\(P_{Ar}\)= 3.782-(0.435+1.613)
\(P_{Ar}\)=1.734atm.
Now, to convert atm into torr,
just multiply the pressure by 760.
\(P_{Ar}=\)1.734×760
\(P_{Ar}=\)1318 torr.
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Sodium bicarbonate or beta-alanine used to improve anaerobic performances exert their effect by?
Sodium bicarbonate or beta-alanine used to improve anaerobic performances exert their effect on the slow rate of decrease of creatine phosphate.
Anaerobic means "with the air" and refers to the body's use of oxygen to produce energy. This typically includes exercises that last longer than 2 minutes. Continuous "steady state" exercise is done with aerobic exercise. Anaerobic means "without air" and refers to the body's ability to produce energy without using oxygen.
Examples of aerobic exercise include swimming laps, running, or cycling. Anaerobic exercise involves a rapid burst of energy and is performed with maximum effort in a short period of time. Examples include jumping, sprinting, and lifting heavy objects. "Walking is a great aerobic exercise. It's thought to be weight-bearing and good for bone strength and health," he says. Oftentimes, people feel unwell and want to lose weight and get fit, but think they need a gym membership to exercise.
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Methane (CH4) undergoes combustion. Which products form?
A. C and H20
B. CO2 and H20
O C. CO2 and H2
D. CO2, H20, and O2
Answer:
carbon dioxide (CO2) and water (H2O).
Explanation:
When methane burns in the air it has a blue flame. In sufficient amounts of oxygen, methane burns to give off carbon dioxide (CO2) and water (H2O). When it undergoes combustion it produces a great amount of heat, which makes it very useful as a fuel source. Methane is a very effective greenhouse gas.
why is copper different than copper ore gives me reasons. Do this asap
Answer:
copper cathodes are normally referred to when talking about copper. Cathode is the purest form of copper and is the feedstock used to produce copper wire, cable, sheet, strip, tube, etc.
Explanation:
Question: What is the hydroxide concentration of a 0.10 molar solution of ammonia at equilibrium if its Ką is 5.62 × 10-102
A. 1.33 x 10-² molar
1.33 x 103 molar
OC. 3.17 x 10-12 molar
OD 3.17 x 108 molar
OE
7.50 x 10€ molar
OB.
The K value of 5.62 x 10-102A may be used to determine the hydroxide concentration of an equilibrium ammonia solution at a concentration of 0.10 molar. The equilibrium constant for the reaction of ammonia with water to produce ammonium and hydroxide ions is known as the K value.
The reaction's equation is as follows: NH3 + H2O -> NH4+ + OH- This equation is used to determine the K value: K = [NH3][NH4+][OH-] The K value may be modified to get the hydroxide concentration .
Since the ammonia concentration is 0.10 molar: [OH-] = K x [NH3] = 5.62 x 10-102A x 0.10 = 3.17 x 10-12 molar As a result, the hydroxide concentration of an equilibrium ammonia solution at 0.10 molar is 3.17 x 10-12 molar.
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2)
Compare the atomic radius of an atom of bromine to the atomic radius of an atom
potassium when both atoms are in the ground state.
If you start with 3 moles of sodium and 3 moles of chlorine to produce sodium chloride, what is the limiting reagent?(you will need to balance the equation first.) na cl2 -> nacl
Sodium(Na) is the limiting reagent.
What is Limiting reagent?The reactant that is totally consumed during a reaction, or the limiting reagent, decides when the process comes to an end. The precise quantity of reactant required to react with another element may be estimated from the reaction stoichiometry.
How do you identify a limiting reagent?
The limiting reactant is the one that is consumed first and sets a limit on the quantity of product(s) that can be produced. Calculate how many moles of each reactant are present and contrast this ratio with the mole ratio of the reactants in the balanced chemical equation to get the limiting reactant.
Start by writing the balanced chemical equation that describes this reaction
\(2Na_{(s)} + Cl_{2 (g)} -- > 2NaCl_{(s)}\)
Notice that the reaction consumes 2 moles of sodium metal for every 1 mole of chlorine gas that takes part in the reaction and produces 2 moles of sodium chloride.
now we can see that we have 3 moles of sodium and 3 moles of chlorine, according to question. so, we can say that sodium is the limiting reagent in the given situation.
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