Answers
hope this helps you out I would have typed an answer using my notes but that was taking to long anyways have a nice day
Related Questions
Welding is an industrial process that is used to join pieces of metal. a certain mixture of gases used in welding is composed of carbon dioxide and argon. the partial pressure of carbon dioxide is
0.080 atm and the partial pressure of argon is 0.24 atm.
(a): What is the total pressure of the mixture?
(b): what fraction of the molecules in the mixture are argon?
7. If you were to draw a particulate representation of air that contained 10 particles, how many of the particles you drew would be nitrogen? how many would be oxygen? argon? carbon dioxide? explain your reasoning
Answers
The total pressure of the system is 0.32 atm an the mole fraction argon of the carbon dioxide is 0.75.
What is the partial pressure?We know that where we have a mixture of gases, each of the gases would exert pressure on the walls of the container. The pressure that is exerted on the walls of the container is what we call the pressure of the gas.
We have;
Pressure of carbon dioxide = 0.080 atm
Pressure of argon = 0.24 atm
Total pressure of the system = 0.080 atm + 0.24 atm = 0.32 atm
Partial pressure = mole fraction * total pressure
Let the mole fraction be X
0.24 = X * 0.32 atm
X = 0.24 atm/0.32 atm
X =0.75
If I am to draw the number of particles, I would draw one particle for carbon dioxide and three particles for argon based on the value of the mole fraction of the system.
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What is the name of the compound CH3CH(CH3)C(CH3)3?
tetramethylpropane
2,2,3-trimethylbutane
isoheptane
1,1,1,2-tetramethylpropane
Answers
The molecular formula for the compound in the task given above is 2,2,3-trimethylbutane.
The correct answer choice is option b.
What is meant by the name or the molecular formula of a compound?The molecular formula of a compound is the name of the compound derived from its structural formula. From the task given above, the parent chain is butane. There are three different substituents groups; 2 different methyl group on carbon 2 and another methyl substituent at carbon 3.
The image to further illustrate the solution to the above problem is attached.
That being said, organic compounds are those compounds which contains carbon and hydrogen.
In conclusion, from the detailed explanation above, it can be deduced that the name of the compound above is 2,2,3-trimethylbutane
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You have a container with a semi-permeable membrane in the middle separating a left and right side. On the left side of the container is a high concentration of salt solutes, what will happen to the solutes in the container?
Answers
What will happen to the solute molecules on the left side of the container would depend on the kind of solution present on the right side.
What is osmosis?What will happen to the solutes in the container can be explained using osmosis.
Osmosis refers to the movement of water molecules from the region of high water potential or low solute concentration to the region of low water potential or high solute concentration through a selectively permeable membrane.
Now, let us assume that the solution on the right side of the container has a lower solute concentration, which means that water molecules would move from the right side to the left side through the semi-permeable membrane. The solutes in the left side of the container would become diluted.
If it were to be the other way round, that is, the solution on the right side has more solutes than the one on the left side. Water molecules will move from the left side to the right side. Thus, the solution on the left side will become more concentrated as a result of water loss.
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I need help on this question please. This is not graded. Thank you.
Answers
A gas has a pressure of 32,541 kPa at 40.0°C. what is the temperature at standard pressure
Answers
Which of these is a safe lab practice?
A. Going to talk to your friend across the room while the Bunsen burner is on.
B. Labeling all chemicals immediately.
C. Picking up a hot beaker with your hands.
D. Pouring all the leftover chemicals and products down the drain.
Answers
Answer:
b labeling all chemical immediately
One of the main components of an airbag is the gas that fills it. As part of the design process, you need to
determine the exact amount of nitrogen that should be produced. Calculate the number of moles of
nitrogen required to fill the airbag. Show your work. Assume that the nitrogen produced by the chemical
reaction is at a temperature of 495°C and that nitrogen gas behaves like an ideal gas. Use this fact sheet
u to review the ideal gas law.
Answers
The number of moles of the gas is 0.016 moles
The airbag reaction is the nitrogen gas obtained by the decomposition of sodium azide and the reaction is
2NaN₃ → 2Na + 3N₂
Then it is under ideal condition
P = 1atm
V = 1L
T = 495°C or 768 K
n = ?
We have to calculate moles of nitrogen = ?
R = 0.082 atm LK⁻¹mol⁻¹
So the formula is
PV =nRT
n = PV/RT
n = 1 atm×1L/0.082 atm LK⁻¹mol⁻¹×768 K
n = 0.016 moles
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Complete the passage to describe how electrons are represented in electron dot diagrams.
The maximum number of dots an electron dot diagram can have is
. The maximum number of dots drawn on a side of a chemical symbol in an electron dot diagram is
.
Answers
The maximum number of dots an electron dot diagram can have is 8.
The maximum number of dots drawn on the side of a chemical symbol in an electron dot diagram is 2.
Electron dot diagramsThe electron dot diagrams is otherwise known as Lewis electron dot diagrams, Lewis structure, or simple Lewis diagram. It is a diagrammatic representation of the valence electrons of atoms using dots to represent electrons around the symbols of atoms.
The valence electron of an atom is the number of electrons present in the outermost shell of the atom. According to the rules, the first shell of an atom can take a maximum of 2 electrons while the remaining shells can take a maximum of 8 electrons each.
Atoms with 8 electrons in their outermost shells are said to be in an octet state.
The number of dots an atom will have around it will, therefore, depend on the number of valence electrons it has. As a rule of thumb, each side of an atom can take a maximum of 2 electrons. Thus, an atom with 8 valence electrons will have 2 dots each on its 4 sides.
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Answer:
the first is 8 an the second one is 2
Explanation:
(photosynthesis)
carbon dioxide water glucose/sugar oxygen
6CO2 + 6H2O + heat
–––––––→ C6H12O6 + 6O2
←––––––––
(respiration)
Number of Number of
Elements: C___ Elements: C___
O___ O___
H___ H___
Analyze and Interpret Data
1. Reason Quantitatively In the reaction above, some molecules have a number in front of
the formula showing how many molecules it takes for the reaction to occur. Tally the
number of elements on each side of the reaction and record the values above.
2. Describe Patterns Describe how the number of elements compare on each side of the
Answers
The reaction the reversible reaction is given as :
6CO₂ + 6H₂O + Heat ⇄ C₆H₁₂O₆ + 6O₂
The photosynthesis is to convert carbon dioxide and water and light in into glucose and oxygen.
photosynthesis :
6CO₂ + 6H₂O + Heat ------> C₆H₁₂O₆ + 6O₂
In cellular respiration organism release energy stored in the chemical bond of glucose.
C₆H₁₂O₆ + 6O₂ -----> 6CO₂ + 6H₂O + Heat
The reversible reaction can be as follows :
6CO₂ + 6H₂O + Heat ⇄ C₆H₁₂O₆ + 6O₂
reactants products
C 6 6
H 12 12
O 18 18
The number of atoms present in reactant side is equal to the number of atom in product side. the equation is balanced.
6 moles of carbon dioxide produce 1 mole of oxygen
6 mole of water produce 1 mole of carbon dioxide
Thus, the reversible reaction given as:
6CO₂ + 6H₂O + Heat ⇄ C₆H₁₂O₆ + 6O₂
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When fossil fuels, such as gasoline, are burned, they create smoke. Smoke is best described as a heterogeneous mixture of solid particles from the burning fuel dispersed in a gas – usually air. Smoke can be described more specifically as a suspension.
What will most likely happen over time to smoke in the atmosphere?
A.The solid particles will spread out and dissolve.
b.The particles will eventually come together in a cloud and produce rain.
c.Over time, the solid particles will settle on whatever is outside.
d.The particles will remain mixed in the air.
Answers
The most likely will happen to smoke in the atmosphere is over time, the solid particles will settle on whatever is outside (Option C).
What is smoke?Smoke can be defined as any group or mixture of small particles that may be present in different states of matter in the air (i.e., in the solid state, liquid state and or gas state), generally composed of burning fossil fuels or carbon.
Therefore, with this data, we can see that smoke is generally composed of carbon but it is also represented by other types of particles in suspension in the atmosphere.
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What summarizes the process of cellular respiration in plants and animals
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In both plants and animals, the process of cellular respiration may be broken down into the following steps: Oxygen + carbon dioxide.
When plant cells undergo cellular respiration, oxygen is taken in through the plant's leaves from the surrounding atmosphere, and carbon dioxide is exhaled back into the atmosphere as a byproduct of the process. In contrast, when animal cells undergo cellular respiration, oxygen is taken in through the lungs, and carbon dioxide is exhaled through the lungs.
Therefore, a quick review, throughout the process of cellular respiration, plants and animals trade oxygen and carbon dioxide with one another.
Therefore, we may draw the following conclusion: Oxygen + carbon dioxide is a shorthand for the process of cellular respiration in plants and animals.
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You are holding a small helium balloon. Your friend says that the buoyant force from the atmosphere is greater on her car than your balloon. Is she correct? Explain your answer.
Answers
Yes , the buoyant force from the atmosphere is greater on her car than your balloon .
So, She is correct.
Since, the density of helium is less than air, the buoyant force exerted by air is less than the weight of the balloon filled with helium, causing the balloon to float in the air and rise.
What do you mean by buoyant force?
The term light power alludes to the vertical coordinated force that a liquid applies on an item that is to some degree or totally drenched in the liquid. The light power emerges from contrasts in hydrostatic strain - the tension applied by a static liquid.
What is the buoyant force on a helium balloon in air?
Helium has 0.0114 pounds per cubic foot. For a one cubic foot helium filled balloon , gravity pulls the down on the helium with a force of 0.0114 pounds while the air pushes up with a force equal to the weight of the air of the helium displaced, or 0.0807 pounds.
Hence, the buoyant force from the atmosphere is greater on the car than the balloon.
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A local AM radio station broadcasts at a frequency of 587 kHz.
Calculate the wavelength at which it is broadcasting.
Wavelength =
Answers
Explanation:
c=v * lambada
lambda= 3*10power of 8m/s ÷587×10power of 3 hz2. Balance these chemical equations.
(a) SO₂ + O₂SO3
(b) NH3 + O₂N₂ + H₂O
(c) C4H10+ O₂ CO₂ + H₂O
(d) Pb(NO3)2 →PbO + NO₂ + O₂
(e) Al + Fe3O4 →→→ Al₂O3 + Fe
(f) Sr + H₂O-Sr(OH)₂ + H₂
Answers
The balanced chemical equation is [tex]\rm 2SO_2 + O_2 \rightarrow 2SO_3[/tex].
What is balanced chemical equation?Balanced chemical equation is defined as a formula where both the reactants and the products have the same amount of atoms of each kind. The law of conservation of mass stipulates that mass cannot be generated or destroyed, hence a chemical equation must always be in balance.
The balanced chemical equation are
[tex]\rm 4NH_3 + 3O_2 \rightarrow 2N_2 + 6H_2O[/tex]
[tex]\rm C_4H_1_0+ 5O_2 \rightarrow 4CO_2 + 5H_2O[/tex]
[tex]\rm 2Pb(NO_3)_2 \rightarrow 2PbO + 4NO_2 + O_2[/tex]
[tex]\rm 8Al + 3Fe_3O_4 \rightarrow 4Al_2O_3 + 9Fe[/tex]
[tex]\rm Sr + 2H_2O \rightarrow Sr(OH)_2 + H_2[/tex]
Thus, balancing the chemical equation is very important as per the law.
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Are there any concerns if you wait an hour or two after you calibrate the spectrophotometer to obtain the absorbance of your solutions and unknown? Explain your answer.
Answers
No, there are no concerns if you wait an hour or two after you calibrate the spectrophotometer to obtain the absorbance of your solutions and unknown as it will not change because the light source is not aging faster but if your light source age faster, then there are concerns.
Why should it be a problem when the light source is aging faster?In the case above, light source is the issue because it is deteriorating quickly. If you're lucky, the lamp's usable life will be at least four digits of hours. On the other hand, allowing the lamp to stabilize itself speeds up aging. Given the limited lifespan, it is advisable to calibrate frequently such as daily.
The calibration rate is determined by the goal of the measurement. For most photometric tests, parameter variations in the interval between calibration and measurement will be negligibly large enough to significantly increase the overall measurement error. (Take note that the amount of error in typical analytical measurements, including sample preparation, is often at or above 10%.)
The routine calibration then appears to be unnecessary because the effort you put out will be pointless. In any instance, the experimental analysis of the impact of daily or biweekly calibration (often conducted inside validation studies) will offer the response.
It may even make sense to calibrate the instrument every 5 or 10 operational hours if you are using it continuously for a long length of time. If the manufacturer changes the cuvette materials (they will also change the Lot No.), you should recalibrate depending on the light source's lifespan and the materials you used to place your samples there. however, you should be cautious of dust because it might significantly alter the outcomes if the lenses have dirt.
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Consider two mixtures of gases available for use to fill a tire. One has the same composition as air (Gas 1: 20% O₂, 80% N₂) and
another has added carbon dioxide (Gas 2: 15% O₂, 80% N₂, 5% CO ₂ ). Compare the partial pressure of nitrogen gas in a 2L sample of
Gas 1 at sea level (1 atm) to the partial pressure of nitrogen gas in a 2L sample of Gas 2 at sea level. Explain your answer.
Answers
The partial pressure of nitrogen gas in 2L sample of gas 1 and gas 2 are equal.
The overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures exerted by each individual gas in the mixture, according to Dalton's law of partial pressures, a gas law.
P'=X° ×Pt ( P' = partial pressure , Xi = mole fraction , Pt= Total pressure )
Gas 1 ( ∵1 mole of gas = 22.4L)
Nitrogen moles = 80% × 2L / 22.4L
=8/5x22.4L
Oxygen moles = 20% ×2L /22.4L
2/5 × 22.4l
Mole fraction of nitrogen = (8/5 ×22.4L) ÷ (8/5 ×22.4L+ 2/5x22.4L)
=4/5
Partial pressure of nitrogen at 1 atm = 4/5 * 1
=4/5
Similarly Gas 2
Nitrogen moles = 80% × 2L / 22.4L
=16/10 × 22.4L
Oxygen moles = 15% × 2L /22.4L
3/10 × 22.4l
Carbon dioxide moles = 5% × 2L /22.4L
1/10 × 22.4L
Mole fraction of nitrogen = (16/10 × 22.4L) ÷ (16/10 ×22.4L+ 3/10x22.4l + 1/10X22.4L) = 4/5
Partial pressure of nitrogen at 1 atm = 4/5 * 1
=4/5
Hence, partial pressure of nitrogen in gas 1 and gas 2 are equal.
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A piece of an unknown metal with mass 23.8g is heated to 100.0 degrees Celsius and dropped into 50.0
cm³ of water at 24.0 degrees Celsius. The final temperature of the system is 32.5 degrees Celsius. What is the specific heat of the metal?
Answers
The specific heat of the metal is 1.1106 J/g°C
Specific heat is the quantity of heat required to raise the temperature of one gram of a substance by one celsius degree
Here given data is
Mass of unknown metal = 23.8g
Temprature = 100°C
Mass of water = 50.0cm³ = 50 g
Temprature of water = 24.0°C
Final temprature of the system = 32.5°C
We have to find specific heat = ?
So first we determine the heat gain by water
Specific heat of water is 4.18 J/g°C
Q = mcΔT
Q = 50 g×8.5°C×4.18 J/g°C
Q = 1776.5 Joules
Then we determine the total heat lost by the unknown metal
Taking the specific heat f the metal to be x
Heat = 23.8g×67.5°C×x
1776.5 Joules = 23.8g×67.5°C×x
1776.5 Joules = 1606.5 J
x = 1606.5 J/1776.5 Joule
x = 1.1106 J/g°C
Specific heat of the metal is 1.1106 J/g°C
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Explain why we need to do
electrolysis of sodium chloride BEFORE we do electrolysis of copper chloride.
Answers
Answer:
When melted at high temperature, sodium chlorideseparates into sodium and chloride ions, so that, electrolysis can take place to form sodium atom and chlorine gas .
Aluminum can be made by reducing alumina Al2O3 by carbon in the reaction equation
2 Al2O3 + 3 C → 4 Al + 3 CO2
according to. How much carbon is needed to reduce Al2O3 to produce 491 grams of pure aluminum? To give an answer to the gram, be sure to add the unit g after the numerical value of your answer.
Answers
Taking into account the reaction stoichiometry, 163.67 grams of C is needed to reduce Al₂O₃ to produce 491 grams of pure aluminum.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Al₂O₃ + 3 C → 4 Al + 3 CO₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al₂O₃: 2 molesC: 3 molesAl: 4 molesCO₂: 3 molesThe molar mass of the compounds is:
Al₂O₃: 102 g/moleC: 12 g/moleAl: 27 g/moleCO₂: 44 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al₂O₃: 2 moles ×102 g/mole= 204 gramsC: 3 moles ×12 g/mole= 36 gramsAl: 4 moles×27 g/mole= 108 gramsCO₂: 3 moles×44 g/mole= 132 gramsMass of carbon requiredThe following rule of three can be applied: if 108 grams of Al are produced by 36 grams of C, 491 grams of Al are produced by how much mass of C?
mass of C= (491 grams of Al× 36 grams of C)÷ 108 grams of Al
mass of C= 163.67 grams
Finally, 163.67 grams of C is required.
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A quantity of nitrogen gas is enclosed in a tightly stoppered 500 mL flask at room temperature (20.0 °C) and 0.836 atm pressure. The flask is then heated to 680 °C. If the flask can withstand pressures up to 3 atm, will it explode under this heating?
Answers
The vessel will not explode since the new gas pressure is less than 3 atm.
What will be the pressure when the temperature of a given volume of nitrogen gas is heated?The pressure when the temperature of a given volume of nitrogen gas is heated is calculated using the formula given below:
P₁/T₁ = P₂/T₂where;
P₁ = initial pressureT₁ = initial temperatureP₂= final pressureT₂ = final temperatureSolving for P₂
P₂ = P₁ * T₂ / T₁
P₂ = 0.836 * (680 + 273) / (20 + 273)
P₂ = 2.72 atm
The new pressure is less than 3 atm.
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A 2.00 gram sample of a glazed donut was placed in a bomb calorimeter with a heat capacity of 3.54 kcal/°C. The sample was completely burned, causing the temperature of the calorimeter to rise by 2.02 °C. How many kilocalories of energy were stored in the donut sample?
Answers
A 2.00 gram sample of a glazed donut was placed in a bomb calorimeter with a heat capacity of 3.54 kcal/°C. The sample was completely burned, causing the temperature of the calorimeter to rise by 2.02 °C. kilocalories of energy were stored in the sample is 14.30 kcal.
given that :
mass = 2 g
heat capacity = 3.54 kcal / °C
change in temperature = 2.02 °C
The heat energy expression is given as :
Q = mc ΔT
Q = 2 g × 3.54 kcal / °C × 2.02 °C
Q = 14.30 kcal
Thus, A 2.00 gram sample of a glazed donut was placed in a bomb calorimeter with a heat capacity of 3.54 kcal/°C. The sample was completely burned, causing the temperature of the calorimeter to rise by 2.02 °C. kilocalories of energy were stored in the sample is 14.30 kcal.
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B
Which compound has the highest melting point?
O Al₂(CO3)3
O C12H22011
OC8H18
O H₂O
Answers
Al₂(CO3)3 has the highest melting point. Aluminum carbonate has melting point of 58 degree Celsius.
Why melting point of aluminum is high?The strength of the metallic connection affects a metal's melting point.If aluminum has a greater melting point than magnesium, it probably has a stronger metallic bond.Positive ions and electrons in aluminum would be more attracted to one another, maintaining the structure's stability and resistance to heat.What are uses of aluminum carbonate?A phosphate-binding medication known as aluminum carbonate, aluminum hydroxide, and aluminum oxide is occasionally given to dogs and cats to bind intestinal phosphate, stop the absorption of food phosphate, and reduce the absorption of phosphate excreted by the pancreas. Due to safety issues, it is rarely utilized in people, although cats and dogs don't seem to react negatively to its presence.For more information on melting point kindly visit to
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Calculate the mass percent of the following solution: 65g of KCl in 46.6g of water
Answers
Considering the definition of mass percent, the mass percent of a solution of 65g of KCl in 46.6g of water is 58.24%.
Mass percentThe mass percent is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.
The mass percent is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:
mass percent= (mass of solute÷ mass of solution)× 100%
Mass percent in this caseIn this case, you know:
mass of solute (KCl)= 65 gmass of water= 46.6 gmass of solution= mass of solute + mass of water= 65 gr + 46.6 g= 111.6 gReplacing in the definition of mass percent:
mass percent= (65 g÷ 111.6 g)× 100%
Solving:
mass percent= 58.24%
Finally, the mass percent is 58.24%.
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What are some non-examples of the Van der Waals force?
Answers
Answer:
These forces differ from covalent and ionic chemical bonding because they result from fluctuations in charge density of particles. Examples of van der Waals forces include hydrogen bonding, dispersion forces, and dipole-dipole interactions.
Explanation:
thsof
is which acid H2S04
Answers
Explanation:
H2So4=sulphuric acid , strong acid
Which of the following best describes temperature:
A: number of molecules
B:motion of molecules
C:size of molecules
D:type of molecules
Answers
Oxygen gas reacts with powdered aluminum according to the following reaction:
4Al(s)+3O2(g)→2Al2O3(s)
What volume of O2 gas (in L), measured at 792 mmHg and 23 ∘C, is required to completely react with 52.6 g of Al?
Answers
The volume (in L) of O₂ gas, measured at 792 mmHg and 23 °C, that is required to completely react with 52.6 g of Al is 34.14 L
How to determine the volume of O₂We'll begin by obtaining the mole of O₂ that reacted. This can be obtained as follow:
Mass of Al = 52.6 gMolar mass of Al = 27 g/molMole of Al = mass / molar mass = 52.6 / 27 = 1.948 mole4Al(s) + 3O₂(g) → 2Al₂O₃(s)
From the balanced equation above,
4 moles of Al reacted with 3 moles of O₂
Therefore,
1.948 moles of Al will react with = (1.948 × 3) / 4 = 1.461 mole
Finally, we shall determine the volume of the O₂ required. Details below
Mole of O₂ (n) = 1.461 moles Pressure (P) = 792 mmHg = 792 / 760 = 1.042 atm Temperature (T) = 23 °C = 23 + 273 = 296 KGas constant (R) = 0.0821 atm.L/Kmol Volume (V) =?PV = nRT
1.042 × V = 1.461 × 0.0821 × 296
Divide both sides by 1.04
V = (1.461 × 0.0821 × 296) / 1.04
V = 34.14 L
Thus, the volume required is 34.14 L
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Hydrogen atoms absorb energy so that electrons can be excited to the n = 6 energy level. Electrons then undergo these transitions, among others: (a) n = 4 → n = 3 (b) n = 6 → n = 3 (c) n = 5 → n = 4 (i) Which transition produces a photon with the least energy? (ii) Which transition produces a photon with the highest frequency? (iii) Which transition produces a photon with the shortest wavelength?
Answers
1) The transition that produces the least energy is n = 4 → n = 3
2) The transition that produces a photon with the highest frequency is n = 6 → n = 3
3) The transition that produces a photon with the shortest wavelength n = 4 → n = 3
What is the Bohr model?We know from the Bohr model that an electron that is found in the hydrogen atom can be moved from a lower to a higher energy level and that would happen when the electron is able to absorb energy in the form of visible light.
Looking at the transitions as we have it here, we can see that the photon that would photons produce the least energy would be two levels that are closest together.
Also, the photon that would have the highest frequency is the photon that is involved in the transition that has the furthest energy apart from each other.
The transition that produces a photon with the shortest wavelength must also be farthest apart in energy.
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9. It says its wrong? someone help!
Answers
The balanced net ionic equation for the reaction between potassium sulfide and lead(II) nitrate is Pb²⁺(aq) + S²⁻(aq) → PbS(s)
Writing balanced net ionic equation for a reactionFrom the question, we are to write the balanced net ionic equation for the given chemical reaction.
The given chemical reaction is
K₂S(aq) + Pb(NO₃)₂(aq) →
The between potassium sulfide and lead(II) nitrate will produce potassium nitrate and lead sulfide.
That is,
K₂S(aq) + Pb(NO₃)₂(aq) → KNO₃(aq) + PbS(s)
Now, balance the equation
K₂S(aq) + Pb(NO₃)₂(aq) → 2KNO₃(aq) + PbS(s)
Write the complete ionic equation
2K⁺(aq) + S²⁻(aq) + Pb²⁺(aq) + 2NO₃⁻(aq) → 2K⁺(aq) + 2NO₃⁻(aq) + PbS(s)
Cancel out the spectator ions
S²⁻(aq) + Pb²⁺(aq) → + PbS(s)
Hence, the balanced net ionic equation is
Pb²⁺(aq) + S²⁻(aq) → PbS(s)
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3 Mg + 1 Fe2O3 --> 2 Fe + 3 MgO
How many grams of magnesium oxide are made from 5.6 grams of magnesium and 10.0 grams of iron (III) oxide ?
Answers
The mass of the magnesium oxide will produce is equal to 9.32 grams
What is a limiting reagent?A limiting reagent can be described as the reactant in the chemical reaction which is consumed first during the completion of a chemical reaction.
The limiting reagent decides the yield of the product when the amount of the reactants is not taken in stoichiometry.
Given, chemical reaction of magnesium and iron oxide is:
[tex]3 Mg + 1 Fe_2O_3 \longrightarrow2 Fe + 3 MgO[/tex]
The mass of the magnesium = 5.6 g
The number of moles of Mg = 5.6/24 = 0.233
The mass of the iron oxide = 10 g
The number of moles of Mg = 10/103.8 = 0.096
The 3 moles of Mg react with iron oxide = 1
Then 0.233 moles of Mg react with iron oxide = 0.233/3 = 0.077
Therefore magnesium is a limiting reagent.
The 0.233 moles of Mg will produce magnesium oxide 0.233 moles.
The mass of the magnesium oxide = 0.233 × 40 = 9.32 g
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