According to the following synthesis reaction determine how many grams of fe2o3 are formed when 16.7 g of fe reacts completely with excess o2. 4fe+3o2 —> fe2o3
Answers
23.88 grams of fe2o3 are formed when 16.7 g of fe reacts completely with excess o2.
According to the synthesis reaction 4Fe + 3O₂ → 2Fe₂O₃, we need to determine how many grams of Fe₂O₃ are formed when 16.7 g of Fe reacts completely with excess O₂.
Step 1: Determine the molar mass of Fe and Fe₂O₃.
Fe: 55.85 g/mol
Fe₂O₃: (2 × 55.85) + (3 × 16.00) = 159.69 g/mol
Step 2: Convert grams of Fe to moles of Fe.
moles of Fe = (16.7 g) / (55.85 g/mol) = 0.299 moles
Step 3: Use the stoichiometry of the reaction to determine moles of Fe₂O₃ produced.
The reaction shows that 4 moles of Fe produce 2 moles of Fe₂O₃. Therefore,
moles of Fe₂O₃ = (0.299 moles Fe) × (2 moles Fe₂O₃ / 4 moles Fe) = 0.1495 moles Fe₂O₃
Step 4: Convert moles of Fe₂O₃ to grams of Fe₂O₃.
grams of Fe₂O₃ = (0.1495 moles) × (159.69 g/mol) = 23.88 g
23.88 g of fe203 is formed.
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Related Questions
What do food webs begin with as the first source of energy A plants B consumers C the sun D decomposers
Answers
Answer:
C:sun
Explanation:
cho lượng dư Al tác dụng với dung dịch H2SO4 đặc nóng. Đâuuf tiên thấy giải phóng ra khí màu A mùi sốc, khí A làm mất màu dung dịch nước brom. Tiếp theo tạo thành kết tủa màu vàng. Rồi thoát ra khí không màu B mùi trứng thối, khí B cũng làm mất màu dung dịch nước brom, tạo kết tủa khi dẫn vào dung dịch Cu(NO3)2. Viết các phương trình phản ứng
Answers
Hope it helps you!
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A student performs a reaction twice. In the second trial, he increases the temperature of the reaction and notes that the reaction happens more quickly. The student concludes that this means the reaction was endothermic. What is wrong with the student's reasoning
Answers
Answer:
higher temperature increases reaction rates for both endothermic and exothermic reactions
Explanation: Sub to rockingmycoolstyle15 on yt
Item 17 Which symbol represents a salt? C2H2 C6H12O6 KCl O2 Item 17 Which symbol represents a salt? C2H2 C6H12O6 KCl O2
Answers
Answer:
The symbol that represent a salt is CaCl2
Explanation:
The CaCI2 is the calcium chloride that an organic compound now a salt having a chemical formula i.e. CaCI2. Also it is non-color cyrstalline solid at the room temperature also it is highly soluble in the water
Therefore as per the given situation the symbol that represent a salt is CaCI2
This is the answer and the same is not provided in the given options
How does positive catalyst increase the rate of chemical reaction?
Answers
Answer:
A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. ... Remember that with a catalyst, the average kinetic energy of the molecules remains the same but the required energy decreases
Explanation:
...
hope that is helpful
Which of the following would
9 indicate a new substance has
been formed?
Bubbling and fizzing
occur.
Powder dissolves in
an unknown liquid
A beaker of
hydrochloric acid
evaporates after
several days
Solid iron is melted to
a liquid
Color YELLOW
Color ORANGE
Color PINK
Which one?
Answers
Answer:
Bubbling and fizzing are likely to occur when a new substance is formed. The other examples are simply changing to a different form of the same substance.
A chemist is identifying an unknown solid substance that appears purple in color. Upon close inspection with a hand lens, she notices tiny grains in the substance. Some of the grains are blue; other grains are red. Based on this information, the substance is most likely a \
Answers
The question is incomplete, the complete question is;
A chemist is identifying an unknown solid substance that appears purple in color. Upon close inspection with a hand lens, she notices tiny grains in the substance. Some of the grains are blue; other grains are red. Based on this information, the substance is most likely a
a. Compound
b. Homogeneous Mixture
c. Pure substance
d. solution
e. heterogeneous mixture
Answer:
heterogeneous mixture
Explanation:
A heterogeneous mixture simply means a mixture of two different substances. If two substances are the same, they are expected to have the same colour or appearance.
We were told in the question that the colour of the mixture appeared purple. On close examination, the sample was found to comprise of two different substances of different colours; blue and red.
If there are two substances of different colours present in the sample, it then follows that the sample is a heterogeneous mixture.
calculate the value of kc from the following equilibrium concentrations: [fencs2 ] = 1.84 × 10−4 m, [fe3 ] = 1.32 × 10−3 m, and [scn–] = 1.02 × 10−3 m
Answers
The equilibrium constant (Kc) is 1.37 * 10² M⁻¹.
First, we write the reaction equation:
Fe³⁺ + SCN⁻ ↔ [FeSCN]²⁺
From this, we can see that the iron(III) cation (Fe³⁺) and the thiocyanate anion (SCN⁻) are the reactants, while the iron(III) thiocyanate ion ([FeSCN]²⁺) is the product. Based on this, we can write the expression for the equilibrium constant (Kc):
\(Kc = \frac{[[FeSCN]^{2+}]}{[Fe^{3+} ][SCN^{-} ] }\)
[Fe³⁺] - equilibrium concentration of the iron(III) ion (1.32 * 10⁻³M)
[SCN⁻] - equilibrium concentration of the thiocyanate ion (1.02 * 10⁻³ M)
[[FeSCN]²⁺] - equilibrium concentration of the iron(III) thiocyanate ion (1.84 * 10⁻⁴ M)
Now we plug the known values into the expression:
Kc = 1.84 * 10⁻⁴ M / (1.32 * 10⁻³ M * 1.02 * 10⁻³M)
Kc = 1.37 * 10² M⁻¹
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1. A neutral atom has a mass number of 128 and an atomic number of 52. Use this information to fill in the table below.
Question Answer
How many protons are in this atom? How do you know?
How many electrons does the atom have? How do you know?
Calculate the number of neutrons – show your work.
If this atom becomes an ion with a +4 charge, how many electrons would the ion have?
This atom has an isotope with one extra neutron – what is its mass number?
Answers
1) p=52
2)p=e=52
52-4=48
128
How many moon phases will we view in one week?
1
2
3
4
Answers
Answer:
4
Explanation:
Hey guys! How is the answer C? I need steps plz
Answers
3.4 x 1023 atoms of Na in moles
Answers
The number of moles of sodium (Na) in 3.4 x 10^23 atoms is approximately 5.64 moles.
In the first paragraph, the main answer is that there are approximately 5.64 moles of sodium (Na) in 3.4 x 10^23 atoms.
Now, let's explain the calculation in the second paragraph. The mole is a unit of measurement used in chemistry to quantify the amount of a substance. One mole of any element contains Avogadro's number of atoms, which is approximately 6.022 x 10^23. In this case, we have 3.4 x 10^23 atoms of sodium (Na). To convert this into moles, we divide the number of atoms by Avogadro's number.
Mathematically, the calculation is as follows:
Moles of Na = (Number of atoms of Na) / (Avogadro's number)
Moles of Na = (3.4 x 10^23) / (6.022 x 10^23)
Moles of Na ≈ 5.64 moles
Therefore, there are approximately 5.64 moles of sodium (Na) in 3.4 x 10^23 atoms.
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Where does energy FIRST come into an ecosystem?
Answers
Answer:
Ecosystem Energy Flow Nearly all of the energy that drives ecosystems ultimately comes from the sun. Solar energy, which is an abiotic factor, by the way, enters the ecosystem through the process of photosynthesis. You can learn more than you want to know about this process in the unit on photosynthesis.
Explanation:
describe the position of the first double bond in an omega-3 fatty acid.
Answers
The first double bond in an omega-3 fatty acid is located at the third carbon atom from the omega end of the molecule.
The omega end refers to the methyl group (CH3) at the end of the fatty acid chain, while the opposite end of the chain is called the alpha end. The double bond in an omega-3 fatty acid is between the third and fourth carbon atoms, counting from the omega end. This double bond is what makes omega-3 fatty acids unique and beneficial to our health. It changes the structure of the molecule and makes it more flexible, which helps it to function properly in our bodies. Omega-3 fatty acids are polyunsaturated fats, which means they have multiple double bonds in their chain.
The location of the double bond is important because it determines the shape and function of the fatty acid. In omega-3 fatty acids, the first double bond is located three carbons away from the omega end, while in omega-6 fatty acids, the first double bond is located six carbons away from the omega end. This small difference in location has a big impact on the function of these fatty acids in our bodies.
In summary, the first double bond in an omega-3 fatty acid is located at the third carbon atom from the omega end of the molecule. This double bond is what makes omega-3 fatty acids unique and beneficial to our health, and its location determines the shape and function of the fatty acid in our bodies.
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When the temperature of a gas is increases within a closed container, pressure increases due to which of the following?
A. The frequency of collisions between molecules and the container walls decreases.
B. The frequency of collisions between molecules and the container walls increases.
C. The spaces between the molecules of gas decrease.
D. The gas turns into a liquid.
Answers
Answer:
It's (B). According to the kinetic theory of gases, the higher the temperature, the the faster the gas particles move inside the container, thus increasing the frequency at which they hit the walls thereby increasing the pressure.
The pressure increases due to the frequency of collisions between molecules and the container walls increases.
What is kinetic theory of matter?The kinetic theory of matter states that all matter consists of numerous small particles which are in constant motion, colliding with one another.
When the temperature of a gas is increases within a closed container, the average kinetic energy of the gas increases.
Thus, when the temperature of a gas is increases within a closed container, pressure increases due to the frequency of collisions between molecules and the container walls increases.
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An unknown substance has a density of 0. 983 g/cm3. What is this density in ng/µm3?
Answers
The density of the unknown substance in ng/µm³ is 0.000983 ng/µm³.
Density refers to the amount of mass contained in a given volume of a substance. It is a physical property of matter that describes how closely packed the particles are in a substance. Mathematically, density is calculated by dividing the mass of an object by its volume, and is expressed in units of mass per unit volume (such as grams per cubic centimeter, or kilograms per liter).
To convert the density from g/cm³ to ng/µm³, we need to use the following conversion factors:
1 g = 1,000,000,000 ng (or 1 x 10⁹ ng)
1 cm³ = 1,000,000,000,000 µm3 (or 1 x 10¹² µm³)
So, we can multiply the density by these conversion factors to get the density in ng/µm³:
0.983 g/cm³ x (1 x 10⁹ ng / 1 g) x (1 cm³ / 1 x 10¹² µm³) = 0.000983 ng/µm³
Therefore, the density of the unknown substance in ng/µm³ is 0.000983 ng/µm³.
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What best describes how the testing of the initial version and the testing of the beta version fit into the four stages of the process of technological design
Answers
Answer:
C. The initial version is tested during the third stage to determine what needs to be improved, and the beta version is tested during the fourth stage to ensure that criteria are met.
Explanation:
Edge 2021
The Testing of the initial version is carried out in the third stage to determine what needs to be improved, while the testing of the beta version is carried out during the fourth stage to ensure that all necessary criteria are met.
The process of technological design involves several distinctive processes which can be broken down into four stages.
The four stages involved in the process of technological design are :
Identify a need : during this process the engineer identifies a problem that needs to be resolved design a solution : an initial design is created to provide a solution to the problem identified in stage 1Implement the solution : The design is tested and implemented if successfulevaluate the solution : In this stage the result from the solution ( beta version ) is subjected to ensure that all criteria are methence the testing of the initial version is to determine what needs improvement while the testing of the beta version is to ensure all criteria are met
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A beaker contains a sample of water with a mass of 325 grams. The water in the beaker
is boiled and weighed again after it cools. The new mass of the water is 305 grams. In
this example of the conservation of matter in physical changes,
A. the mass is less after it cools because water has less mass as a gas.
B. the mass of the water was 305 grams and the mass of the water vapor was 20 grams.
C. the process of boiling destroyed 20 grams of the water and left 305 grams of water.
D. the heat energy created by boiling water makes up the rest of the mass.
Answers
Answer: a
Explanation:
Bc I just did it and yeah
Which image represents a homogeneous mixture?
Which image represents a heterogeneous mixture?
Answers
Imagine B is the Homogeneous mixture because it has no changes or irregularities
Imagine A represents a heterogeneous mixture as it is a mixture composition that does not remain the same throughout the mixture whereas Imagine B represents a homogeneous mixture as it does not have any change or irregularity.
What are Homogenous and Heterogenous mixtures?A homogeneous mixture is defined as having a fairly uniform form and composition, so many homogeneous mixtures are referred to as solutions whereas heterogeneous mixtures are defined as separate substances or phases. The three states or states of matter are gas, liquid and solid.
Some examples of mixtures that include mixtures of sand and water, mixtures of sugar and salt, and mixtures of lime juice and water.
In homogenous solution, particles are distributed uniformly and have uniform composition while in heterogenous solution, particles are distributed non-uniformly and have non-uniform composition
Thus, Imagine A represents a heterogeneous mixture as it is a mixture composition that does not remain the same throughout the mixture whereas Imagine B represents a homogeneous mixture as it does not have any change or irregularity.
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according to the video, why should a used chemical container never be refilled? used chemicals may be contaminated, which could cause an unexpected reaction.
Answers
Yes, that is correct. A used chemical container should never be refilled because used chemicals may be contaminated, which could cause an unexpected reaction or even a hazardous situation.
Additionally, used containers may have residue from the previous chemical that could react with the new chemical being added, leading to unexpected and potentially dangerous results. It is always recommended to use a clean and properly labeled container for each chemical to ensure safe storage and use.
A chemical container is a device used to store and transport chemicals and other hazardous materials. It is usually made of materials such as plastic, metal, or glass that are resistant to corrosion and chemical reactions with the contents. Chemical containers are designed to be leak-proof and safe to handle, and are often labeled with warnings and safety information to ensure proper use and handling.
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What is the term for evaluation of work by others in the same field? group work peer review collaboration
Answers
Answer:
the answer is peer review!
Explanation:
the intermediate in the sn1 reaction was a carbocation. what options other than combination with a nucleophile are open to a carbocation?
Answers
In addition to combination with a nucleophile, a carbocation intermediate in an Sn1 reaction can also undergo rearrangement reactions. This occurs when a neighboring carbon or group migrates to the positively charged carbon, creating a more stable carbocation intermediate.
In an SN1 reaction, the intermediate carbocation can undergo various processes other than combination with a nucleophile. Some options include:
1. Rearrangement: Carbocations can undergo rearrangement to form a more stable carbocation, typically by hydride or alkyl group migration.
2. Solvent capture: Carbocations can react with the solvent molecules to form a solvated product.
3. Deprotonation: Carbocations can lose a proton to form an alkene through an elimination reaction (E1).
These options allow the carbocation to stabilize itself and lead to different reaction products.
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why can't matter be destroyed or created
Answers
Atoms can be combined with other atoms to form molecules. Matter is anything that has mass and takes up space. ... Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed
Two substances each have a
temperature of 23 degrees Celsius.
After they are combined the
temperature rises to 27 degrees
Celsius. What evidence proves a
chemical reaction occurred?
Answers
The distance between two points on a map is 0.704 kilometers. What is the distance in meters?
Answers
Answer:
704 meters
Explanation:
1 Kilometer = 1000 meters
0.704 km * 100m/ 1 km = 704 m
what elements react with mercury?
Answers
fluorine, F2, chlorine, Cl2, bromine, Br2, or iodine, I2
Properties of a gas are..
-no definite shape or volume
-has definite shape, does NOT
-have definite volume
-has definite volume AND shape
-none of the above
ASAP need help
Answers
the answer would be none of the above.
None of the above I’m pretty sure
Calculate the density of sulfuric acid from the information that 35.4 mL of the acid masses 65.14 g.
Answers
Answer:
The answer is 1.84 g/mLExplanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume} \\ \)
From the question we have
\(density = \frac{65.14}{35.4} \\ = 1.840112994...\)
We have the final answer as
1.84 g/mLHope this helps you
tan delta 0 = (k * tan(KR) - K * tan(kR))/(K + k * tan(kR) * tan(KR)) Using the same equation (1), calculate the phase shift for a Helium atom scattered off a Sodium atom (He+Na) at an incident energy E = 5K Kelvins).
Answers
The phase shift for a Helium atoms scattered off a Sodium atom (He+Na) at an incident energy E = 5K Kelvins is calculated using the equation tan delta 0 = (k * tan(KR) - K * tan(kR))/(K + k * tan(kR) * tan(KR)).
To calculate the phase shift for the scattering of a Helium atom off a Sodium atom, we use the equation tan delta 0 = (k * tan(KR) - K * tan(kR))/(K + k * tan(kR) * tan(KR)), where tan delta 0 represents the phase shift, K and k are constants, R is the scattering radius, and E is the incident energy. In this case, the incident energy E is given as 5K Kelvins.
The equation relates the phase shift to the scattering parameters and energy. The term k * tan(KR) represents the phase shift due to the scattering of the incident wave, while the term K * tan(kR) represents the phase shift due to the scattered wave. The numerator of the equation calculates the difference between these two phase shifts, while the denominator involves their combination.
By substituting the given values and solving the equation, we can determine the phase shift for the He+Na scattering at an incident energy of 5K Kelvins. Further calculations involving the constants K and k, as well as the scattering radius R, might be necessary to obtain a precise numerical value.
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determine how much heat (in kj) of 2.89 mol of tio2(s)
Answers
Total heat generated by 2 mole of TiO2(s) is 4.963kJ.
The amount of heat released in the reaction of 2.89 mol of TiO2(s) can be calculated using the following equation: q = nCΔT, where n is the number of moles, C is the specific heat capacity of TiO2, and ΔT is the change in temperature.
The specific heat capacity of TiO2 is 683. 697. J/kgK. and the change in temperature is is 25k. By plugging in the values and converting J to kJ,
q = 2.89 * 25 * 683.697
=> 4963.35
In brief, the amount of heat released by 2.89 mol of TiO2(s) is 4.963kJ.
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Complete question :
determine how much heat (in kj) of 2.89 mol of tio2(s) with a temperature difference of 25k