Answers
Answer:
9
Explanation:
12 sandwiches uses 24 pieces and 33-24
Related Questions
Which of the following items are made from renewable resources? Select the two correct answers. (1 point)
Responses
plastic fork
plastic fork
metal can
metal can
leather jacket
leather jacket
electronics
electronics
printer paper
Answers
A leather jacket and printer paper are examples of items that can be made from renewable resources, while plastic forks, metal cans, and electronics are not considered renewable due to their reliance on non-renewable materials and processes. Option C, E
The two correct answers that are made from renewable resources are:
C) Leather jacket: Leather is derived from animal hides, which are a byproduct of the meat industry. As long as there is a sustainable and responsible approach to animal farming, the production of leather can be considered renewable. The hides are obtained from animals that are raised for meat consumption, and their use in leather production helps reduce waste.
E) Printer paper: Printer paper can be made from various sources, including trees, bamboo, and recycled paper fibers. If the paper is sourced from sustainably managed forests or from fast-growing plants like bamboo, it can be considered renewable. Additionally, the use of recycled paper fibers reduces the demand for materials and promotes a more circular economy.
The other options, A) plastic fork, B) metal can, and D) electronics, are not made from renewable resources:
A) Plastic fork: Plastics are typically derived from fossil fuels, which are non-renewable resources. The production of plastic involves the extraction and processing of petroleum or natural gas, both of which are finite resources.
B) Metal can: Metal cans are predominantly made from aluminum or steel. While these metals can be recycled, their initial production requires the extraction of raw materials from the Earth, which is not a renewable process.
D) Electronics: Electronics are made from a wide range of materials, including metals, plastics, and various chemical compounds. The production of electronics involves the extraction of raw materials, many of which are non-renewable resources.
Option C and E.
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What is the energy of a photon that has a wavelength corresponding to the peak in the figure which is 950 nm. Planck’s constant is h=6.626 x 10^-34 Jxs, and the speed of light is c=3.00 x 10^8 m/s.
Answers
The energy of a photon that has a wavelength of 950 nm is 1.89 × 10 ⁻¹⁶ kJ.
A photon is a primary particle that is a quantum of the electromagnetic area, such as electromagnetic radiation inclusive of light and radio waves, and the pressure carrier for the electromagnetic pressure. Photons are massless so they always move at the rate of light in a vacuum.
A photon is a tiny particle that comprises waves of electromagnetic radiation. As proven by Maxwell, photons are simply electric-powered fields journeying thru an area. Photons have no fee, no resting mass, and journey at the speed of mild.
calculation:-
E = hv
E = hc/λ
= 6.626 x 10⁻³⁴ × 3 × 10⁸ / 950 × 10⁻⁹
= 18884.1 × 10 ⁻¹⁷ J
= 1.89 × 10 ⁻¹³ J
= 1.89 × 10 ⁻¹⁶ kJ
Photons and electrons are the primary quantum-mechanical debris but they've completely distinctive residences. Photon is a form of fundamental particle which acts as a provider of energy, but the electron is a subatomic particle that takes place in all of the atoms.
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The procedure calls for 2.00 mL of the liquid reactant, 2,4-pentanedione, to be used in the reaction. It has a density of 0.975 g/mL. How many grams of this reactant will be used in the reaction
Answers
It will be used 1.95 grams of the reactant in the reaction.
DensityTo calculate the density of a given substance, use the following expression:
\(d = \frac{m}{v}\)
Thus, having the values of volume and density, just apply the formula above to find the value of mass, so that:
\(0.975 = \frac{m}{2}\)
\(m= 1.95 grams\)
So, it will be used 1.95 grams of the reactant in the reaction.
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The formation of ash by burning wood is called a chemical change. Give reason.
Answers
the formation of ash by burning wood is called a chemical change because ash is a new substance formed by burning wood
Perform the following operation
and express the answer in
scientific notation.
Answers
Answer:
Coeficient: 70219691
Exponent: 0
Explanation:
3.687×10⁵ = 0.3687×10⁶
Then:
2.589 × 10⁶ ÷ 3.687 × 10⁵ = 2.589 × 10⁶ ÷ 0.3687 × 10⁶
= (2.589/0.3687) × (10⁶ / 10⁶)
= 7.0219691 × 1
= 7.0219691 × 10⁰
Note:
10⁰ = 1
A benzene ring with two substituents, a bromo and chloro substituent. Each substituent is placed on a carbon two carbons away from the other. The parent name is benzene and there is a chloro and bromo substituent. Disubstituted benzenes can be described using the terms ortho, meta and para, depending on their relative distance from each other. The terms are often just abbreviated as o, m and p. In addition, the IUPAC name can use locant numbers instead of the descriptor.
a. 1-bromo-3-chlorobenzene
b. 3-bromo-1-chlorobenzene
c. meta-bromochlorobenzene
d. o-bromochlorobenzene
e. ortho-bromochlorobenzene
f. m-bromochlorobenzene
Answers
The correct name of the structure given in the question is 1–bromo–3–chloro benzene (Option A)
How to name organic compoundsThe naming of organic compounds follows the standard of the international union of pure and applied chemistry (IUPAC).
To name a compound, we must
Locate the longest continuous carbon chain and determine the functional group of the compound. This gives the name of the compound. Locate the substituent groups attached Give the substitute group the lowest locate by naming alphabetically Combine the above to obtain the name of the compound. How name the compound The compound is a benzene ringThe substituent groups attached are bromo (Br) and Chloro (Cl) The Br is at carbon 1 while Cl is at carbon 3Therefore, the name of the compound is 1–bromo–3–chloro benzeneComplete question
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What is the electron configuration for N (nitrogen)?
A. 1s22s23s23p1
B. 1s21p5
C. 1s22s22p3
D. 1s22s22p23s1
Answers
Explanation:
₇N = 1s² 2s² 2p³
Group = 15period = 2atomic mass = 14Hydride of Nitrogen = Ammoniavalency = 3Therefore,
Option C is correct ✔
Joan wrote a science fiction story where the people only texted each other, and never talked. They still had vocal chords, but they could no
longer make sounds. Their vocal chords were
Answers
Answer:
Vestigial
Explanation:
The retention of genetically determined traits or structures that have partially or completely lost their ancestral purpose in a specific species is known as vestigiality. In most cases, evaluating the vestigality requires comparison with comparable traits in closely related species.
Where did you put H an He? What are your reasoning for placement?
Answers
Answer:
On the placement of hydrogen and helium in the periodic system
H1=1
He2=2
The recommended application for dicyclanil for an adult sheep is 65 mg/kg of body mass. If dicyclanil is supplied in a spray with a concentration of 50. mg/mL, how many milliliters of the spray are required to treat a 70.-kg adult sheep?
Answers
Answer:
91 millilitres
Explanation:
Recommended application = 65mg / Kg
This means 65 mg of dicyclanil per kg (1 kg of body mass).
Concentration = 50 mg / mL
How many millilitres required to treat 70kg adult?
If 65mg = 1 kg
x = 70 mg
x = 70 * 65 = 4550 mg
Concentration = Mass / Volume
50 mg/mL = 4550 / volume
volume = 4550 / 50 = 91 mL
The composition of a compound is 28.73% K, 1.48% H, 22.76% P, and 47.03% O. The molar mass of the
compound is 136.1 g/mol.
I
Answers
The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).
The given compound has a percent composition of K = 28.73%, H = 1.48%, P = 22.76%, and O = 47.03%. Its molar mass is 136.1 g/mol. To determine its molecular formula, we need to find its empirical formula and calculate its molecular formula from its empirical formula.The empirical formula is the smallest whole number ratio of atoms in a compound. It can be determined by converting the percent composition of the elements into their respective moles and dividing each by the smallest number of moles calculated. The moles of K, H, P, and O in 100 g of the compound are: K = 28.73 g x (1 mol/39.1 g) = 0.734 molH = 1.48 g x (1 mol/1.01 g) = 1.46 molP = 22.76 g x (1 mol/30.97 g) = 0.736 molO = 47.03 g x (1 mol/16.00 g) = 2.94 molDividing each by the smallest number of moles gives the following ratios: K = 0.734/0.734 = 1H = 1.46/0.734 = 2P = 0.736/0.734 = 1.002O = 2.94/0.734 = 4. The empirical formula of the compound is \(K_2H_2P_2O_8\). To calculate the molecular formula, we need to determine the factor by which the empirical formula should be multiplied to obtain the molecular formula. This can be done by comparing the molar mass of the empirical formula to the molar mass of the compound.The molar mass of \(K_2H_2P_2O_8\) is: \(M(K_2H_2P_2O_8)\) = (2 x 39.1 g/mol) + (2 x 1.01 g/mol) + (2 x 30.97 g/mol) + (8 x 16.00 g/mol) = 276.2 g/mol. The factor by which the empirical formula should be multiplied is: M(molecular formula)/M(empirical formula) = 136.1 g/mol/276.2 g/mol = 0.4935. The molecular formula is obtained by multiplying the empirical formula by this factor: \(K_2H_2P_2O_8 * 0.4935 = K_2HPO_4\). Therefore, the molecular formula of the compound is \(K_2HPO_4\).The molecular formula of the given compound having a composition of 28.73% K, 1.48% H, 22.76% P, and 47.03% O with a molar mass of 136.1 g/mol is \(K_2HPO_4\). The empirical formula of the compound is \(K_2H_2P_2O_8\). The compound's molecular formula is calculated by determining the factor by which the empirical formula should be multiplied to obtain the molecular formula. The factor is M(molecular formula)/M(empirical formula) = 136.1 g/mol/276.2 g/mol = 0.4935. The molecular formula of the compound is obtained by multiplying the empirical formula by this factor, resulting in the molecular formula \(K_2HPO_4\).For more questions on empirical formula
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The correct question would be as
The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?
\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)
1. What pressure (in kPa) is required to contain 0.15 moles of N, gas in a 4.2 Lcontainer at a temperature of 23.0°C?
Answers
Answer:
\(89.17\text{ kPa}\)Explanation:
Here, we want to get the required pressure in kPa
We start by writing the ideal gas equation
We have that as:
\(PV\text{ = nRT}\)where P is the pressure we want to calculate
V is the volume which is 4.2 L
n is the number of moles which is 0.15
T is the temperature which we will convert to Kelvin by adding 273K:
We have that as 273 + 23 = 300K
R is the molar gas constant which is 0.0821 L.atm/mol.K
Substituting the values, we have it that:
\(P\text{ = }\frac{nRT}{V}\text{ = }\frac{0.15\text{ }\times0.0821\times300}{4.2}\text{ = 0.88 atm}\)Finally, we convert the pressure in atm to pressure in kPa
To do this, we multiply the atm value by 101.325
We have that as:
\(0.88\text{ }\times\text{ 101.325 = 89.17 kPa}\)20.00 mL of 1.40 M HCl diluted to 0.430 L.
What is the pH?
Answers
We calculate the pH using the equation pH = -log(Ka), which informs us that a solution with 1.0 106 hydrogen ions has a pH of -log(1.0 106) = 7.39.
When diluted with water, what pH will HCl have?According to the provided data, the pH of hydrochloric acid is 2, indicating that it has an acidic nature. The pH will rise to 7 on dilution, or when we add water to the solution. If it includes more hydrogen ions than hydroxide ions, the pH will be lower than 7.
Does HCl dilution affect pH?When an acid solution is diluted, the pH rises. As an illustration, dilute 10.0 mL of 0.1 M HCl to 30.0 mL.
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Bauxite ore contains aluminum oxide, which is decomposed using electricity to
produce aluminum metal and oxygen. What mass of aluminum metal can be
produced from 125 g of aluminum oxide?
Answers
Answer:
66.48 g.
Explanation:
Bauxite ore contains aluminium oxide which is decomposed using electricity to produce aluminium metal and oxygen gas
Jonathon is conducting an experiment to determine how much precipitate (solid product) will form when combining measured volumes of Aich, and NaOH. According to his calculations the reaction should produce 26.0 grams of solid AKOH), when combined. However, when Jonathon measures the mass of the solid precipitate formed in his experiment, he finds that the experiment actually produced 24.5 grams of Al(OH).
Answers
Jonathon's experiment produced 24.5 grams of Al(OH), which is less than the predicted amount of 26.0 grams of AKOH. The discrepancy could be due to measurement errors, incomplete reaction.
What is discrepancy?
To determine the cause of the discrepancy, Jonathon should first review his experimental procedure and make sure that all measurements and calculations were performed accurately. He should also check that the reactants were mixed thoroughly and that the reaction was allowed to proceed to completion. If any errors or inconsistencies are identified, Jonathon should correct them and repeat the experiment to obtain more accurate results.
If the experimental procedure was carried out correctly and the discrepancy cannot be attributed to measurement errors, Jonathon should consider the possibility of impurities in the reactants. Even small amounts of impurities can affect the outcome of a chemical reaction, so it is important to use high-quality, pure chemicals in experiments whenever possible.
Overall, the most important thing for Jonathon to do in this situation is to carefully review his experimental data and methodology, and to identify any potential sources of error or uncertainty. By doing so, he can improve the accuracy and reliability of his results and draw more meaningful conclusions from his experiment.
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oxidation number of Ag in Ag2O
Answers
The oxidation number of Ag in Ag2O is +1.
In Ag2O, there are two silver atoms (Ag) and one oxygen atom (O). Oxygen is known to have an oxidation number of -2 in most compounds. Since the compound is neutral, the sum of the oxidation numbers of all the atoms must equal zero.
Therefore, the oxidation numbers of the two silver atoms must add up to +2 to balance out the -2 oxidation number of the oxygen atom. Since there are two silver atoms, each silver atom must have an oxidation number of +1 to yield a total oxidation number of +2 for the compound.
In Ag2O, the silver atoms lose one electron each to form Ag+ ions. This results in an oxidation number of +1 for each silver atom. The oxygen atom gains two electrons from the silver atoms to achieve a stable octet configuration, resulting in an oxidation number of -2 for the oxygen atom. The compound Ag2O is formed through the transfer of electrons, with each silver atom exhibiting an oxidation number of +1.
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Please help due today
Answers
Answer:
OPTION B .
AS THEY WILL PRODUCE CO,CO2 WHICH WILL MAKE AIR POLLUED AS WELL AS RISE THE TEMPERATURE
Zoe left her water bottle capped and in her bedroom. She came back some time later to realize that the bottle was “sweating” and left a ring of liquid on her nightstand
Explain thoroughly the science behind why Zoe’s water bottle is sweating
Answers
Answer:
Condensation
Explanation:
Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.
Silver ion can be used to gravimetrically analyze Br- ion. Calculate the gravimetric factor for Br- using silver bromide. Please show how to do so as well.
Answers
The gravimetric factor for Br- using silver bromide is 0.425.
What is the gravimetric factor?The gravimetric factor is an expression that is used to convert grams of a compound into grams of a single element.
It is expressed as a ratio of the formula weight (FW) of the substance that is being determined to that of a second substance that is weighed.
Gravimetric factor = formula mass of substance weight / formula mass of substance soughtFor example formula of silver bromide is AgBr and the formula mass of silver bromide is 188 g/mol
Formula mass of bromide ion = 80 g/mol
Gravimetric factor = 80/1188
Gravimetric factor = 0.425
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Which of these has the least mass? J. a bicycle K. a pint of milk L. a pencil M. a computer
Answers
Answer: A pencil
Explanation: The pencil has the least strength than the other objects.
Which seasons in Atlanta GA have worst AQI
Answers
In Atlanta, GA, certain seasons are associated with poorer air quality due to various factors such as weather conditions, human activities, and geographical location.
Typically, the seasons with the worst AQI in Atlanta, GA, are summer and early fall. This is primarily due to the combination of high temperatures, stagnant air masses, and increased pollution from various sources.
During the summer months, Atlanta experiences hot and humid weather, which can contribute to the formation of ground-level ozone. Ozone is a harmful pollutant that is created when pollutants from vehicles, power plants, and industrial activities react with sunlight and heat. High levels of ozone can cause respiratory issues and other health problems.
In addition to ozone, Atlanta also experiences increased levels of particulate matter (PM) during the summer and early fall. PM refers to tiny particles suspended in the air, which can come from sources such as vehicle exhaust, industrial emissions, and wildfires.
These particles can be inhaled into the lungs and can have detrimental effects on respiratory health.
It's important to note that air quality can vary from year to year and is influenced by various factors. Local regulations, weather patterns, and changes in pollutant emissions can all impact the AQI during different seasons.
Monitoring air quality reports and taking necessary precautions such as reducing outdoor activities during times of poor air quality can help individuals stay informed and protect their health.
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Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does. Which of the following is one reason for this difference?
A
The particle volume of Ar is greater than that of Ne.
B
Ar atoms have more valence electrons than Ne atoms have, so Ar atoms have greater interparticle forces.
The intermolecular forces between Ne atoms are greater than those between Ar atoms.
D
Ar atoms are more attracted to the walls of the container than Ne atoms are.
Answers
Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does because A. The particle volume of Ar is greater than that of Ne.
When considering the ideal behavior of a gas, we make 2 assumptions:
The volume of the gas is negligible in comparison to the container.The attraction forces between the particles are negligible.Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does. Which of the following is one reason for this difference?
A. The particle volume of Ar is greater than that of Ne. YES. Since Ar particles are bigger than Ne ones, their volume is harder to neglect. B. Ar atoms have more valence electrons than Ne atoms have, so Ar atoms have greater interparticle forces. NO. They have the same number of valence electrons (8). C. The intermolecular forces between Ne atoms are greater than those between Ar atoms. NO. The intermolecular forces between Ne atoms are lower than those between Ar atoms. D. Ar atoms are more attracted to the walls of the container than Ne atoms are. NO. There are no appreciable differences between the attractions to the walls.Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does because A. The particle volume of Ar is greater than that of Ne.
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Question 2 of 10
What is the purpose of the flame that is lit below a hot air balloon?
A. To increase enthalpy
B. To increase reduction
C. To decrease enthalpy
O D. To decrease specific impulse
Answers
Answer:
A is correct answer for your question. A
Explanation:
A P E X
The purpose of the flame that is lit below a hot air balloon is to Increase Enthalpy. Hence, Option (A) is Correct.
What is Enthalpy ?
A thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.
A hot air balloon uses a burner to heat up the air inside the balloon. The burner is usually fueled by liquid propane. The burner mixes the fuel with air and ignites the mixture, which creates a flame directly underneath the bottom opening of the hot air balloon.
Once the air inside the balloon begins to get warm, the balloon will rise. The pilot controls the balloon’s altitude by releasing hot air from a vent at the top of the balloon, releasing the warmer air causes the balloon to descend.
Therefore, The purpose of the flame that is lit below a hot air balloon is to Increase Enthalpy. Hence, Option (A) is Correct.
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Other images based on previous question
Answers
A colored substance that is entirely or almost entirely insoluble in water is called a pigment and organic molecule.
Thus, Contrarily, dyes are usually soluble, at least initially, during their use. In general, pigments are frequently inorganic substances while dyes are frequently organic molecules.
The global market for inorganic, organic, and specialty pigments reached around 7.4 million tons in 2006.
In a report published in April 2018 by Bloomberg Businessweek, the pigment sector was predicted to be worth $30 billion globally.
Titanium dioxide, which is used to increase the white brightness of numerous items, is valued at $13.2 billion annually, while Ferrari red is worth $300 million.
Thus, A colored substance that is entirely or almost entirely insoluble in water is called a pigment.
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2.62 Predict the chemical formulas of the compounds formed by the following pairs of ions: (a) Cr3+ and Br, (b) Fe3+ and O2, (c) Hg22+ and CO2, (d) Ca2+ and CIO3, (e) NH4+ and PO³
Answers
Answer:
(a) Cr3+ and Br- will form CrBr3 (chromium(III) bromide)
(b) Fe3+ and O2- will form Fe2O3 (iron(III) oxide)
(c) Hg22+ and CO32- will form Hg2CO3 (mercury(I) carbonate)
(d) Ca2+ and ClO3- will form Ca(ClO3)2 (calcium chlorate)
(e) NH4+ and PO43- will form (NH4)3PO4 (ammonium phosphate)
Explanation:
chatGPT
The chemical formulas for the compounds formed by the given pairs of ions are: (a) CrBr3, (b) Fe2O3, (c) Hg2(CO3)2, (d) Ca(ClO3)2, and (e) (NH4)3PO4.
Explanation:(a) Cr3+ and Br- : In order to form a neutral compound, the charges of the ions must balance. The charge of Cr3+ is 3+ and the charge of Br- is 1-. To balance the charges, we need three Br- ions for every Cr3+ ion. Therefore, the chemical formula is CrBr3.
(b) Fe3+ and O2- : The charge of Fe3+ is 3+ and the charge of O2- is 2-. To balance the charges, we need two O2- ions for every Fe3+ ion. Therefore, the chemical formula is Fe2O3.
(c) Hg22+ and CO2- : The charge of Hg22+ is 2+ and the charge of CO2- is 2-. The charges are already balanced, so no extra ions are needed. Therefore, the chemical formula is Hg2(CO3)2.
(d) Ca2+ and ClO3- : The charge of Ca2+ is 2+ and the charge of ClO3- is 1-. To balance the charges, we need two ClO3- ions for every Ca2+ ion. Therefore, the chemical formula is Ca(ClO3)2.
(e) NH4+ and PO3- : The charge of NH4+ is 1+ and the charge of PO3- is 3-. To balance the charges, we need three NH4+ ions for every PO3- ion. Therefore, the chemical formula is (NH4)3PO4.
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explain how you would calculate the q for warming 100.00 grams of liquid water from 0*C to 100*C
Answers
It would require 418,000 Joules of heat (q) to warm 100.00 grams of liquid water from 0°C to 100°C.
To calculate the heat (q) required to warm 100.00 grams of liquid water from 0°C to 100°C, you can use the formula:
q = m * c * ΔT
where:
q is the heat,
m is the mass of the substance (in grams),
c is the specific heat capacity of the substance, and
ΔT is the change in temperature.
For water, the specific heat capacity (c) is approximately 4.18 J/g°c. The mass (m) is given as 100.00 grams. The change in temperature (ΔT) is calculated as the final temperature minus the initial temperature, which is 100°C - 0°C = 100°C.
Substituting the values into the formula, we have:
q = 100.00 g * 4.18 J/g°c * 100°C
q = 418,000 J
Therefore, it would require 418,000 Joules of heat (q) to warm 100.00 grams of liquid water from 0°C to 100°C.
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___Al + ____O2 → ____Al2O3
Answers
Answer:
4,3,2
Explanation:
HOPE THIS HELPS
For the reaction shown, calculate how many grams of each product form when the following amounts of reactant completely react to form products. Assume that there is more than enough of the other reactant.
2Al(s)+Fe2O3(s)→Al2O3(s)+2Fe(l)
a) Calculate the mass of Al2O3 formed when 4.1 g of Al completely reacts.
Express your answer using two significant figures.
b)Calculate the mass of Fe formed when 4.1 g Al completely reacts.
Express your answer using two significant figures.
c)Calculate the mass of Fe formed when 4.1 g Fe2O3 completely reacts.
Express your answer using two significant figures.
Answers
According to the given balanced equation:
a) 4.1 g of Al form 7.7 g of Al₂O₃.b) 4.1 g of Al form 8.5 g of Fe.c) 4.1 g of Fe₂O₃ form 2.9 g of Fe.We want to calculate the mass of products when certain amounts of reactants react. This is a stoichiometry problem.
What is stoichiometry?Stoichiometry refers to the relationship between the quantities of reactants and products before, during, and following chemical reactions.
Let's consider the following balanced equation.
2 Al(s) + Fe₂O₃(s) → Al₂O₃(s) + 2 Fe(l)
a) Calculate the mass of Al₂O₃ formed when 4.1 g of Al completely reacts.
The mass ratio of Al to Al₂O₃ is 53.96:101.96.
4.1 g Al × 101.96 g Al₂O₃/53.96 g Al = 7.7 g Al₂O₃
b) Calculate the mass of Fe formed when 4.1 g Al completely reacts.
The mass ratio of Al to Fe is 53.96:111.70.
4.1 g Al × 111.70 g Fe/53.96 g Al = 8.5 g Fe
c) Calculate the mass of Fe formed when 4.1 g Fe₂O₃ completely reacts.
The mass ratio of Fe₂O₃ to Fe is 159.69:111.70.
4.1 g Fe₂O₃ × 111.70 g Fe/159.69 g Fe₂O₃ = 2.9 g Fe
According to the given balanced equation:
a) 4.1 g of Al form 7.7 g of Al₂O₃.b) 4.1 g of Al form 8.5 g of Fe.c) 4.1 g of Fe₂O₃ form 2.9 g of Fe.Learn more about stoichiometry here: https://brainly.com/question/16060223
How many grams of K are in 3.14 mol of K4C?
Answers
Answer:
122.768662
Explanation:
Calculate the standard cell potential ( E∘ ) for the reaction
X(s)+Y+(aq)→X+(aq)+Y(s)
if K = 6.79×10−3.
Answers
The cell potential of the cell is obtained as -0.12 V.
What is the cell potential?Now we know that the cell potential has to do with the difference between the electrode potential of the cathode and the anode. Now we can see that we have the equilibrium constant that have been shown as K as 6.79×10^−3.
Using the formula;
Ecell = 0.0592/n * log K
Where n the number of electrons transferred in the process. Recall that K is the electrode potential and the Ecell is the cell potential.
Ecell = 0.0592/1 * log 6.79×10^−3
= -0.12 V
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