The percent yiled shows the extent of conversion of reactants to products. The percent yiled here is 83.1%.
Percent yieldThe percent yiled in a reaction is calculated as te ratio of the actual yield to the theoretical yiled multiplied by 100.
Hence the balanced reaction equation is; Fe3O4 + 4CO → 3Fe + 4CO2.
Number of moles of Fe3O4 = 70.0 g/232 g/mol = 0.3 moles
Number of moles of CO = 70.0 g/28 g/mol = 2.5 moles
If 1 mole of Fe3O4 reacts with 4 moles of CO
x moles of Fe3O4 reacts with 2.5 moles of CO
x = 0.6 moles
Hence, Fe3O4 is the limiting reactant.
Now;
1 mole of Fe3O4 yileds 3 moles of Fe
0.3 moles of Fe3O4 yileds 0.3 moles * 3 moles/1 mole = 0.9 moles
Mass of Fe produced = 0.9 moles * 56 g/mol = 50.4 g
Percent yield = 41.9 g/ 50.4 g * 100/1 = 83.1%
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What does the ozone layer protect the earth against?.
A compound is 52.0% zinc 9.6% carbon and 38.4% oxygen. Calculate the empirical formula of the compound.
Answer:
So a compound is 52% Zinc(Zn), 9.6% Carbon(C), and 38.4% Oxygen (O). Let’s first start off by assuming that we have 100 g of this compound. This means that we have 52 g of Zinc, 9.6 g of Carbon, and 38.4 g of Oxygen.Zinc = 65.38 g/molCarbon = 12 g/molOxygen = 16 g/molThis means we have:52 g of Zn(1 mol Zn/65.38 g of Zn) ≈0.8 mol of Zn.9.6 g of C(1 mol C/12 g of C) = 0.8 mol of C38.4 g of O(1 mol of O/16 g of O) = 2.4 mol of O.
Explanation:
What we want to do next is divide each element by the common factor of all of them, which is 0.8. In most cases, you divide each element by the element with the least amount of moles. After we divide each by 0.8, you’ll notice you have 1 Zn, 1 C, and 3 O. This gives you the empirical formula of ZnCO3, or Zinc Carbonate.
Air is made up of different gases, such as oxygen, nitrogen, and carbon dioxide.
Which statement best describes these three components of air?
Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.
Oxygen, nitrogen, and carbon dioxide cannot react with another substance.
Oxygen, nitrogen, and carbon dioxide are chemically bonded to one another.
Oxygen, nitrogen, and carbon dioxide can be classified as elements
Answer:
Oxygen, nitrogen, and carbon dioxide are chemically bonded to one another.
other answer wrong coz carbon dioxide can be broken down into 1 Carbon, 2 Oxygen
Explanation:
The statement that best describes these three components of air is as follows:
Oxygen, nitrogen, and carbon dioxide are all classified as pure substances.Thus, the correct option for this question is A.
What is Air?Air may be defined as the combination of invisible, odorless, and tasteless gases such as oxygen, nitrogen, carbon dioxide, etc. that significantly surround any celestial body like the earth.
A pure substance may be characterized as a type of substance that does not have to be a single chemical element. Due to this, water, nitrogen, carbon dioxide, oxygen, etc. are the valid and most accurate examples of pure substances.
The homogeneous mixture or combination of gases like air can also be remarkably considered a pure substance. It is up to the point until there is no change of phase.
Therefore, oxygen, nitrogen, and carbon dioxide are all classified as pure substances is the statement that best describes these three components of air. Thus, the correct option for this question is A.
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The concentration of minerals in veins usually involves: Multiple Choice metamorphism. hot fluids. enrichment through crystal settling. mechanical weathering.
As the minerals are carried through the veins of the rock, they could settle there causing enrichment through crystal settling.
Minerals in veinsMinerals in rocks could be dissolved in aquoeus solutions in the rocks. When this occurs, the solutions could be carried through the veins in the rock.
As the minerals are carried through the veins of the rock, they could settle there causing enrichment through crystal settling.
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Calculate the solubility of carbon dioxide at 400 kPa.
Select one:
O a. 9.48 CO2/L
O b. 0.61 CO2/L
O c. 94.87 CO2/L
O d. 6.08 CO2/L
The solubility of carbon dioxide at 400 kPa at room temperature is ;
( B ) 0.61 CO2/L
Given data
pressure of CO₂ = 400 Kpa = 3.95 atm
Kh of CO₂ = 3.3 * 10⁻² mol/L.atm
Calculate the solubility of carbon dioxideSolubility = pressure * Kh value of CO₂
= 3.95 atm * 3.3 * 10⁻² mol / L.atm
= 0.13 mol/l CO₂
= 0.61 CO₂ / L
Hence we can conclude that the solubility of CO₂ at 400 kPa is 0.13 mol/l CO₂.
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From the options the closest answer is ( B ) 0.61 CO₂ / L
Why do you see a flash of lightning before you hear the thunder during a storm?
Answer:
the speed of light travels much faster than the speed of sound.
What is the concentration of a solution in
which 60 g of NaCl are dissolved in 1.0 L of water?
Answer:
6%
Explanation:
60 g / 1000 g = 6%
The concentration of a solution in 60 g of NaCl are dissolved in 1L of water will be 6%.
What is concentration?The abundance of an ingredient ratio of the volume of a combination is called concentration. Mass concentration, molar concentration, number concentration, and volume concentration are all examples of mathematical descriptions.
Concentration can be calculated as:
C=m/V.
where, C is concentration , m is mass and V is volume.
It is given that, m = 60 g and V = 1L or 1000 mL.
Now, put the value of given data in above equation.
C= 60/1000
=6%.
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A potential energy diagram is shown
What is the total change in enthalpy of this reaction?
we know that,
AᵣH = (Sum of enthalpies of products)-(Sum of enthalpies of reactants)
AᵣH = 55kJ - 30 kJ
AᵣH = 25kJ
or
AᵣH =( Activation Energy-Reactant energy) +( Activation Energy-product energy)
AᵣH =(65kJ -30kJ) +(65kJ-55kJ)
Since there's a degrade , we'll consider the PE of product as -veAᵣH = 35kJ - 10kJ
AᵣH = 25kJ
Answer:
B. 25 kj
Explanation:
Products-reactants
I took the exam
Someone pls help me. I will mark you brainliest.
Answer:
Lighter-colored objects emit more light, and darker colored objects absorb more light. The more light an object absorbs, the more it heats up when it is exposed to light, which is why dark things get hot more quickly than light things if left out in the sun
Explanation:
How do you think plants would grow in space? Which tropism(s) would be affected and why?
Answer:
In the absence of gravity, plants use other environmental factors, such as light, to orient and guide growth. A bank of light emitting diodes (LEDs) above the plants produces a spectrum of light suited for the plants' growth.
Which is the following is a decomposition reaction
The equation that is a decomposition reaction is
PbCO3(s) ---> PbO(s) + CO2(g)
That is option D. The properties of a decomposition reaction can further be understood below.
Properties of a decomposition reactionA chemical reaction is defined as the combination of substances called reactants to form a product. The various types of chemical reaction include:
synthesis reactioncombustion reactiondecomposition reactionsingle or double replacement reactionDecomposition reaction is that type of chemical reaction in which the reactant breaks down to form two or more products.
Therefore the heating of lead (II) carbonate is a decomposition reaction.
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When is pressure-volume work said to be done on a system?.
What is the percentage by mass of water in the compound FeCl3 • 6H20 ?
Answer:
52.12%
Explanation:
First you need to find the mass of the total molecule. The mass of one atom of Fe is 55.847. The mass of one atom of Cl is 35.453. The mass of O is 16.00, and the mass of H is 1.00. The mass of the whole atom is calculated as follows:
55.847 + 3(35.453) + 6(16.00)+ 12(1.00) = 270.206.
Next calculate the mass of water in the molecule:
(2)1.00 + 16.00 = 18.00(6 molecules) = 108
Finally, divide the mass of water by the mass of the whole molecule and multiply by 100 to get it as a percent:
108/207.206 = 0.52122 x 100 = 52.12%
Edwin rotates the Moon around the Earth to show a full month. After one full revolution around the Earth, the Moon casts a shado
on the Earth again. Another student states that if this models the Sun, Earth and Moon correctly, then a solar eclipse would happe
once a month.
Edwin found out a solar eclipse happens about once every 18 months. How should Edwin improve his model to better represent
how often eclipses occur?
OA. He should make both the Earth and the Moon spin on their tilted axes.
OB.
He should make the Sun a large, round object.
OC. He should make the Moon orbit Earth at an angle to the table, and not parallel
Answer:
C
Explanation:
Parallel makes the shadow happen every month
non parallel would be less frequent
He should make the Moon orbit Earth at an angle to the table, and not parallel. So, the correct option is C.
What is an orbit?The curving path that an object in space takes around another object as a result of gravity is known as an orbit. Moons orbiting planets, planets orbiting planets, and artificial satellites orbiting the Earth are examples of objects where this is frequently seen.
A route that an object in space follows around another is known as an orbit. A satellite is a thing that orbits the earth. An Earth- or moon-like natural satellite is one possibility. Moons are satellites that orbit many planets. A man-made satellite is also possible, such as the International Space Station.
The solar system's planets, comets, asteroids, and other celestial bodies revolve around the sun. The majority of solar system objects travel along or very near a hypothetical flat surface. The ecliptic plane is the name given to this hypothetical plane.
Therefore, the correct option is C.
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ASAPPP
What information does a flame test provide?
O A. The temperature that causes emissions
B. The emission spectrum of an element
C. The absorption spectrum of an element
Answer:
B. The emiision spectrum of an element
Explanation:
just took the test
Answer:
b
Explanation:
A feather gently floats on a pool. Which of the following statements best explains why the feather stays on top of the water?
Answer:
The water molecules are held tightly together by hydrogen bonding.
Explanation:
This bond gives surface tension to the water, therefore causing the feather to float.
A student built a model of DNA to show its helical structure in an attempt to display their knowledge of the chemical properties of the 3D structure. In fact, the teacher asked the entire class to create similar models. However, the teacher asks the students to incorporate a biological explanation for how each DNA molecule uniquely codes for different traits. Which component should be incorporated in the student models in order to meet the teacher's expectation for illustrating DNA's ability to code for unique traits? A) The DNA models should have different A:T, C:G ratios. B) The DNA models should have unique nucleotide sequences. C) The DNA models should have different angles of curvature for the helical strands. D) The DNA molecules should have alternating ribose and deoxyribose as the sugars in the backbone.
The DNA sequence determines the different traits, therefore, the student's DNA models should have unique nucleotide sequences.
What determines how each DNA molecule uniquely codes for different traits?The different traits which are produced from the DNA molecule is dependent on the sequence of nucleotides in the DNA molecule.
The unique sequence of nucleotides are known as genes.
Therefore, the student's DNA models should have unique nucleotide sequences.
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Answer:
B) The DNA models should have unique nucleotide sequences
Explanation:
This answer is the only one that makes sense as it is the reason how only four different types of nucleotide (adenine, thymine, guanine, and cytosine) could be arranged into many different types of sequences to create different types of species.
In response to an aspirin (acetylsalicylic acid) overdose, you would expect to observe which acute compensatory response
Compensatory responses are the compensation mechanism that maintains the body's fluid levels. The increased alveolar ventilation is seen in aspirin overdose.
What is an aspirin overdose?Aspirin or acetylsalicylic acid is a general pain reliever that can cause poisoning when overdosed. It results in tinnitus, hyperventilation, increased heart rate, low blood pressure, fever, dehydration, etc.
Aspirin toxicity decreases the pH making the blood more acidic causing increased ventilation through alveoli to remove the excess carbon dioxide to balance the pH levels.
Therefore, in aspirin poisoning, the increased alveolar ventilation is the acute compensatory response.
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Compare natural selection to evolution. Be sure to justify your response in two or more complete sentences in the essay
box below.
Answer:
Natural selection is a process in which organisms are fit to adapt and live in the environment. Natural selection was an idea developed by Charles Darwin, Darwin contributed this idea when he was studying birds and tortoises at the Galapagos Islands. He then wrote his famous book, Origin of Species. Evolution is also very similar, evolution is a process in which organisms reproduce and mutate in order to survive and adapt. As you can see, natural selection and evolution are alike in many ways.
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•Expert•
Brainly Community Contributor
An ion has 56 protons, 54 electrons, and 81 neutrons. What is its atomic number ?
The Atomic Number indicates the number of protons = 56
At 15.17 atm and 243.41 K a certain gas has a volume of 641.68 L. What will the volume of gas be at 561.06 K and 70.3 atm?
Answer:
See below:Explanation:
P1V1/T1 = P2V2/T2
P1V1/T1 * T2 / P2 = V2
15.17 *641.68 / 243.41 * 561.06/70.3 = 319.17 Liters
what is the ionic compound name for NH4Cl
Answer:
Ammonium Chloride
Explanation:
The compound NH₄Cl is commonly known as Ammonium Chloride.
I hope this helps.
The ionic compound name for NH₄Cl is ammonium chloride.
The ionic compound formed by the combination of ammonium (NH₄⁺) cation and chloride (Cl⁻) anion is called ammonium chloride. The ammonium cation is formed by the combination of a positively charged nitrogen atom and four hydrogen atoms bonded together. The chloride anion is a negatively charged chlorine atom.
Ammonium chloride is commonly used in various applications such as in fertilizers, in the production of dry cell batteries, as a flux in metalworking, and as a cough suppressant in medicine. It has a distinctive salty taste and is sometimes used in food as a flavoring agent, particularly in licorice candies.
Hence, the name of NH₄Cl is ammonium chloride.
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Why does benzilic acid only precipitate in acidic solution.
Write a balanced chemical equation for the following reactions:
1) Calcium hydroxide+ Carbon dioxide → Calcium carbonate + water
What element is found in Group 16 and Period 3?
Answer:
sulfur is found in group 16 period 3
If an atom has five protons, five neutrons, and five electrons, what is the overall charge of the atom?
Answer:
neutral
Explanation:
cause the all balance out
What type of decay occurs during the fission of 240Pu?
P94240u→U92236+_____
Select one:
α
β+
β-
γ
Answer:
[tex] \: \boxed{ \sf \: Plutonium \: to \: Uranium \: is \: Alpha \: Decay! }[/tex]
Explanation:
Some nuclei attains more stabily by reducing their size, Alpha Decay is an example of such scenery.Nuclei having more than 210 nucleons, are so large in size hence the balancing force which prevents the repulsion between protons dominates, and due to excessive of protons lead to decay.
Consider any radioactive atom X with atomic mass A & atomic number z, when undergoes
alpha decay or radioactive emission, then the initial nucleus undergoes Excited state, and while returning to ground state it emits Gamma Radiation.
[tex]\boxed{\sf X_z^A \rightarrow Y_{z-2}^{A-4}+He_2^4+ \gamma }[/tex]
Given,
Parent nuclei X = Pu(A= 240, z=94)
Daughter nuclei Y = U(A= 236, z=92)
[tex]\sf Pu_z^A \rightarrow U_{z-2}^{A-4}+He_2^4 \\ \sf Pu_{94}^{240} \rightarrow U_{94 - 2}^{240 - 4}+He_2^4 \\ \sf Pu_{94}^{240} \rightarrow U_{92}^{236}+He_2^4 [/tex]
Hence the given fission of plutonium to uranium is Alpha Decay!
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Rocky is a dog used to help investigate crime scenes involving fire. What is Rocky MOST likely trained to do?
a. he can test the scene for carbon monoxide.
b. He can detect the scent of cigarettes and matches
c. He can find a fire's polnt of origin by sniffing for it.
D. He can smell the scene to find flammable liquids,
Answer:
The answer is D. He can smell the scene to find flammable liquids.
Explanation:
He will smell an object then find the liquid that could of led to it.
under what temperature will volume of gas at 0 degree celcius double itself if the pressire is kept constant ????
Answer:
273.15° C
Explanation: Ideal gasses tend to double in volume when their temperature doubles. 0°C = 273.15K so double 273.15 gives 546.3K.
Converting back to Celcius
546.3-273.15 =273.15°C
A stock solution is 5.00 M. How much of the stock solution in mL should you dilute to 100 mL, to make a 0.200 M solution
Answer:
4ml
Explanation:
using;C1V1=C2V2
5V1=0.2×100
5V1=20
V1=20/5
V1=4ml