Answers
Answer:
.
Explanation:
Related Questions
Suppose you heat a metal object with a mass of 34.5 g to 95.5 °C and transfer it to a calorimeter containing 100.0 g of water at 17.5 °C. The water and metal reach a final temperature of 24.9 °C.
Metal in a covered cup with a thermometer and heat indicated as leaving the metal.
What is the specific heat of the metal in J/g⋅∘C
Answers
q = m × c × ΔT
where q is the heat transferred, m is the mass of the metal, c is the specific heat of the metal, and ΔT is the change in temperature.
First, we need to calculate the heat transferred from the metal to the water:
q = m × c × ΔT
q = (34.5 g) × c × (95.5 °C - 24.9 °C)
q = 224,085 J
Next, we can calculate the heat absorbed by the water:
q = m × c × ΔT
q = (100.0 g) × (4.184 J/g⋅∘C) × (24.9 °C - 17.5 °C)
q = 3,073 J
Since the heat transferred from the metal to the water is equal to the heat absorbed by the water, we can set the two equations equal to each other and solve for c:
m × c × ΔT = m × c × ΔT
(34.5 g) × c × (95.5 °C - 24.9 °C) = (100.0 g) × (4.184 J/g⋅∘C) × (24.9 °C - 17.5 °C)
c = 0.385 J/g⋅∘C
Therefore, the specific heat of the metal is 0.385 J/g⋅∘C.
Helppppppp plssss guysss
Answers
Answer:
3 - coefficient
2 subscripr
6 total #
cl- element symbol
During the reaction, the energy is N2+3H2 2H3 is
Answers
Answer:
The reaction N2 + 3H2 → 2NH3 is an exothermic reaction, which means that it releases heat. The amount of energy released is called the enthalpy of reaction, and it is typically measured in kilojoules per mole (kJ/mol). The enthalpy of reaction for the Haber-Bosch process, which is the industrial process used to produce ammonia, is -46.2 kJ/mol. This means that for every mole of ammonia produced, 46.2 kJ of heat is released.
The energy released during the Haber-Bosch process is used to heat the reactants and to drive the reaction forward. The reaction is exothermic because the bonds in the products (NH3) are stronger than the bonds in the reactants (N2 and H2). When the reactants are combined, the energy released when the bonds in the products form is greater than the energy required to break the bonds in the reactants. This excess energy is released as heat.
The Haber-Bosch process is a very important industrial process, and it is used to produce ammonia on a large scale. Ammonia is used in a variety of products, including fertilizers, explosives, and plastics. The exothermic nature of the Haber-Bosch process makes it a very efficient way to produce ammonia.
Explanation:
Consider the following reaction: 2N2O5(g) → 4NO2(g) + O2(g) Calculate the volume N2O5 that must decompose completely to produce 9.64 L nitrogen dioxide.
Answers
The volume of \(N_2O_5\) needed to produce 9.64 L of \(NO_2\) is 4.97 L, calculated using stoichiometry and the ideal gas equation.
The given chemical equation is \(2N_2O_5(g) \rightarrow 4NO_2(g) + O_2(g)\) .The volume of \(N_2O_5\) that decomposes completely to form 9.64 L of \(NO_2\) is to be calculated. For this, we can use the concept of stoichiometry. Stoichiometry is a branch of chemistry that deals with the quantitative relationships between reactants and products in a balanced chemical equation.To calculate the volume of \(N_2O_5\) that is needed to produce 9.64 L of \(NO_2\), we will first determine the number of moles of NO2 produced in the reaction. For this, we can use the ideal gas equation, PV = nRT. Here, we have the volume of NO2 and we can assume the pressure and temperature to be constant. Thus, we have PV = nRT, where P = pressure, V = volume, n = number of moles, R = ideal gas constant, and T = temperature. Substituting the given values in the ideal gas equation, we get,n = PV/RT = (1 atm × 9.64 L)/(0.0821 L atm K-1 mol-1 × 300 K) = 0.404 molFrom the chemical equation, we see that 2 moles of \(N_2O_5\) give 4 moles of \(NO_2\). Thus, 0.404 mol of \(NO_2\) must have been produced from (0.404/2) = 0.202 mol of \(N_2O_5\). Using the ideal gas equation, we can also find the volume of 0.202 mol of \(N_2O_5\) at the given conditions. Thus, V = nRT/P = (0.202 mol × 0.0821 L atm K-1 mol-1 × 300 K)/1 atm = 4.97 L. Thus, the volume of \(N_2O_5\) that must decompose completely to produce 9.64 L nitrogen dioxide is 4.97 L.For more questions on stoichiometry
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PROJECT: HYDROELECTRIC POWER
Assignment Directions:
Compose an essay on hydroelectric power of at least 400 words.
Assignment Guidelines:
In your report, be sure to address:
How a hydroelectric power plant works, including why dams are built as parts of large hydropower plants;
The environmental and economic benefits of hydroelectricity, giving examples from the case studies; and
The environmental and cultural disadvantages of hydropower, giving examples from the case studies.
Answers
Hydroelectric Power: Harnessing Nature’s Energy
Let's imagine a huge wall blocking a river. On one side, the water level is high, and on the other, it's low. Now imagine that this wall has a mechanism to let the water flow from the high side to the low side, and in the process, it produces electricity. This is, in simple terms, how a hydroelectric power plant works!
Hydroelectric power plants work by using water to turn turbines that generate electricity. They are often built with dams, which are like giant walls across rivers. The dams are essential because they raise the water level on one side, creating a reservoir or a lake. This reservoir stores a huge amount of potential energy. When the water is released, it flows down through turbines, and this energy is converted into mechanical energy. The turbines are connected to generators, which turn the mechanical energy into electricity.
Now, let's talk about some of the environmental and economic benefits of hydroelectricity. It's like hitting two birds with one stone! Firstly, hydroelectric power doesn’t produce greenhouse gases or pollutants during operation, which means it’s much cleaner for our air compared to coal or gas power plants. For example, the Itaipu Dam in Brazil and Paraguay is a great case study. It generates so much electricity from hydro power that it reduces CO2 emissions equivalent to what 21.6 million cars would produce in a year!
Another economic benefit is that the electricity produced is usually cheaper in the long run. Hydroelectric plants have high upfront costs but can operate for a very long time. The Hoover Dam in the USA, built in the 1930s, still generates electricity at low cost, providing power to millions of homes.
However, there is no such thing as a free lunch. There are also environmental and cultural disadvantages to hydroelectric power. When a dam is built, the area behind it gets flooded. This means that plants, animals, and even people's homes can be submerged. For instance, the Three Gorges Dam in China displaced over 1.2 million people and flooded archaeological sites. Additionally, dams can impact fish populations. In the United States, salmon populations in the Pacific Northwest have decreased partly because dams block their migration routes.
Dams also affect the natural flow of rivers, which can have far-reaching consequences for ecosystems. The Aswan Dam in Egypt, for example, has reduced the fertility of the Nile Delta because the nutrients that used to flow down the river and enrich the soil are now trapped behind the dam.
In conclusion, hydroelectric power is an incredible way to generate clean energy, but it's important to weigh these benefits against the environmental and cultural costs. Finding ways to mitigate the negative impacts or looking at alternative renewable energy sources can help us move towards a more sustainable future.
*Keep in mind, you should paraphrase this or use it as your frame of reference, otherwise it would be plain plagiarism.*
The power of water has been harnessed by humans for centuries to generate electricity, and hydroelectric power is a renewable and sustainable energy source that has been used for many years. In this essay, we will explore the inner workings of hydroelectric power plants, the advantages and disadvantages of this energy source, and the potential it holds for a sustainable energy future. Hydroelectric power plants use the force of falling water to turn turbines, generating electricity through a process that is clean and efficient. Dams are built as part of large hydropower plants to control the flow of water and store it for later use. When the water is released from the dam, it flows through a penstock and turns the turbine, which generates electricity. Moreover, hydropower plants can be easily adjusted to meet peak demand for electricity, making them a valuable source of reliable and flexible energy.
One of the main advantages of hydroelectricity is its sustainability. Water is a renewable resource that is constantly replenished by the water cycle, making hydropower an almost infinite source of energy. Additionally, hydropower plants can provide a range of ecosystem services, such as flood control, irrigation, and recreation. For example, the Itapúa Dam on the Paraná River in Brazil provides water for irrigation, supports local fishing industries, and generates electricity for millions of homes. Nevertheless, there are also environmental and cultural drawbacks to hydropower. Large dams can cause significant harm to river ecosystems, altering the natural flow of water and affecting the habitats of fish and other aquatic species. Moreover, the construction of dams can displace local communities and destroy cultural heritage sites. For example, the construction of the Three Gorges Dam in China has caused the displacement of over one million people and has destroyed numerous cultural heritage sites.
Despite these challenges, the potential of hydroelectric power for a sustainable energy future cannot be ignored. As we move towards a world that is less reliant on fossil fuels, hydropower can play a critical role in providing clean, renewable, and reliable energy. Furthermore, new technologies are being developed to reduce the environmental impact of hydropower, such as fish ladders and other measures to support fish migration. Furthermore, hydroelectric power is a powerful and sustainable source of energy that harnesses the power of falling water to generate electricity. Although there are challenges associated with hydropower, such as the environmental and cultural impacts of large dams, the benefits of this energy source are significant. As we continue to seek sustainable solutions to our energy needs, hydroelectric power will undoubtedly play a critical role in meeting our energy demands while also protecting the environment and supporting economic growth.
Thank you, I genuinely hope this helps.
Please help me
A proton is approximately 2000 times heavier than an electron
How would the speeds of these particles compare if their corresponding wavelengths were equal
Answers
The speed of the proton would be 1/2000th that of the electron for their corresponding wavelengths to be equal.
Speed of atomic particlesThe de Broglie wavelength of a particle is given by:
λ = h/p
where λ is the wavelengthh is the Planck's constantp is the momentum of the particle.If the wavelengths of a proton and an electron are equal, their momenta must also be equal, since h is a constant.
The momentum of a particle is given by:
p = MV
m is the mass of the particlev is its velocity.Thus: MV proton = MV electron
Vp = Ve x (Me/Mp)
Given that a proton is approximately 2000 times heavier than an electron, we can substitute the mass ratio into the equation to get:
Vp = Vp x (1/2000)
This tells us that the speed of the proton would be 1/2000th that of the electron for their corresponding wavelengths to be equal.
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In the organization of living things, tissues combine to form
A)Cells
B)communities
C) organisms
D)Organs
Answers
Answer:
D
Explanation:
Answer:d
Explanation:
Na is the element sodium's
A. formula.
B. compound.
C. symbol.
Answers
Na is the symbol for sodium.
Calculate the value of Dell H Kj upon kg for the following reaction using the list thermochemical reaction equation 2N2 + O2 form 2n2o DELLH equals to?second equation to end to 2NH3 + 3 N 2 O forM 4N2 + 3h2o DELL H equals to -1010KJ third equation for 4NH3 + 3 O2 form 2 N2 + 6h2oh DELL H equals to -1531 kj
Answers
The enthalpy for the reaction, N\(_2\)(g) + 1/2 O\(_2\)(g) →N\(_2\)O(g) is +81.5. among all the given options, the correct option is option A.
What is enthalpy?The amount of heat inside a system is measured as enthalpy. This heat is used to cause a process to occur. Enthalpy is indeed a thermodynamic quantity since every system that involves heat is referred to be a thermodynamic system.
Additionally, it is important to remember that each system has a number of players. These individuals each have their own pressure and volume. We already know that the ratio of a system's pressure to its volume is constant.
N\(_2\)(g) + 1/2 O\(_2\)(g) →N\(_2\)O(g)
i)2 NH\(_3\)(g) + 3 N\(_2\)O(g) → 4N\(_2\)(g) + 3 H\(_2\)O(l) ∆H°/kJ= -1010 KJ
ii)4 NH\(_3\)(g) + 3 O\(_2\)(g) → 2 N\(_2\)(g) + 6 H\(_2\)O(l) ∆H°/kJ = -1531 KJ
Multiply second equation with 4 and first equation with 2. Now substract third equation from fourth equation.
N\(_2\)(g) + 1/2 O\(_2\)(g) →N\(_2\)O(g) ΔH=+81.5
Therefore, the enthalpy for the reaction, N\(_2\)(g) + 1/2 O\(_2\)(g) →N\(_2\)O(g) is +81.5.
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What's galactose's empirical formula?
Answers
Answer:
C6H12O6
Explanation:
C6H12O6
A red shirt obsorbs red light true or false
Answers
Answer:
A red shirt appears red to our eyes because the shirt absorbs the red wavelengths of visible light. The shorter the wavelength of light, the more energy it has.
Explanation:
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The temperature at which a liquid becomes a gas is the
point.
O A) freezing
O B) boiling
O C) condensation
O D) melting
Answers
Answer:
Boiling
Explanation:
Which bone is located between the incus and the inner ear?
cochlea
stapes
incus
malleus
Answers
Answer: The answer is incus
PLEASE HELP!!!
How many calories are in 4,180 joules?
Answers
Answer:
To convert joules to calories, you can use the conversion factor:
1 calorie = 4.184 joules
To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:
4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)
Therefore, there are approximately 0.9 calories in 4,180 joules.
If you begin with 5.000 grams of KClO3(s) how many moles and KClO3(s)
will be used, and b) how many grams, moles, and molecules of the product species will
be formed?
Answers
Based on the given data, the amount of products from 5.00 g of KClO₃ is:
0.04 moles of KCl2.98 g KCl2.41 * 10²² molecules of KCl 0.06 moles of O₂.1.92 g of O₂3.61 * 10²² molecules of O₂What amount of products is formed from the decomposition of KClO₃?The decomposition of KClO₃ is given by the equation below:
2 KClO₃ -----> 2 KCl + 3 O₂
2 moles of KClO₃ produces 2 moles of KCl and 3 moles of O₂
Molar mass of KClO₃ is 122.5 g/mol
molar mass of KCl = 74.5 g
molar mass of O₂ = 32 g
Moles of KClO₃ in 5.00 g = 5.00/122.5
moles of KClO₃ = 0.04 molesFor KCl
a. moles: 0.04 moles of KClO₃ will produce 0.04 moles of KCl
b. mass of KCl = 0.04 * 74.5 = 2.98 g KCl
c. number of molecules of KCl = 0.04 * 6.02 * 10²³ = 2.41 * 10²² molecules of KCl
For O₂:
a. moles of O₂; 0.04 moles of KClO₃ will produce = 0.06 moles of O₂.
b. mass of O₂ = 0.06 * 32 g = 1.92 g of O₂
c. number of molecules: 0.06 * 6.02 * 10²³ = 3.61 * 10²² molecules of O₂
Therefore, the amount of products from 5.00 g of KClO₃ is:
0.04 moles of KCl2.98 g KCl2.41 * 10²² molecules of KCl 0.06 moles of O₂.1.92 g of O₂3.61 * 10²² molecules of O₂Learn more about moles and molecules at: https://brainly.com/question/26135244
1. Which of the following choices demonstrates the law of constant composition? (Slides 2 ‒ 3: Laws on Matter) (a) Nitrogen and oxygen are both found in nature as diatomic molecules. (b) When 20.0 g of nitrogen and 32.0 g of oxygen are combined and allowed to react in two separate experiments, both times the product isolated from reaction contains 14.0 g of nitrogen and 32.0 g of oxygen. (c) Nitrogen and oxygen gases are mixed to produce a sample consisting of 20.0 g of nitrogen and 32.0 g of oxygen. (d) When 14.0 g of nitrogen and 32.0 g of oxygen are mixed and react, there is no measurable change in mass during the reaction. (e) Nitrogen and oxygen are gases found in air, nitrogen is approximately 79% of air and oxygen is approximately 21%.
Answers
Answer:
(b) When 20.0 g of nitrogen and 32.0 g of oxygen are combined and allowed to react in two separate experiments, both times the product isolated from reaction contains 14.0 g of nitrogen and 32.0 g of oxygen.
Explanation:
The law of definite proportion states that a gen chemical compound always contains its constituent elements in a fixed ratio by mass, independent on the method of preparation.
The molar mass of Nitrogen and Oxygen would always remain the same, allowing for exact reactant masses (or mole ratio) irrespective of the given amount of sample.
When two substances at room temperature are combined, the product feels HOT. What
kind of reaction is this?
Answers
Answer:
The correct answer is - exothermic reaction.
Explanation:
Exothermic reactions are the reaction that releases energy into the surrounding and does not require energy to take place due to the total energy of the reactants the total energy of the products is more than tthe total energy of the products. It releases energy usually as heat or light with the product.
In the given condition of room temperature mixing two substance produces hot products, fits with the explanation given above, therefore, it is an exothermic reaction.
Amory turns the light on in her house. Looking at the lights, she begins to wonder how the charges are moving through the bulb. Which statement best describes how the charges move through the bulb ?
Answers
The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.
What is an electrical charge?An electrical charge is a type of positive or negative charge of the particles that move in a conductor.
At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.
The electrical charges depend on the charge's initial time, the final time, and the net outward current.
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How many moles of chlorine atoms are there in 0.5 mol of titanium (III) chloride?
Answers
Answer:
it is your answer..... if it is helpful plzz like and comment.....
How is heat transferred from one object to another? A. Heat moves from warmer objects to cooler objects. B. Heat moves from cooler objects to warmer objects. c. Heat moves between objects of the same temperature. D. Heat moves back and forth between two objects.
Answers
Answer: I believe the answer is A, heat moves from warmer objects to cooler objects. I know for sure it isn’t C or D though so A
The heat is transferred from one object to another as heat moves from warmer objects to cooler objects. The correct option is A.
What is the transfer of heat?There are three ways to transfer heat. They are conduction, convection, and radiation. Heat travels from one body to another body. If the temperature of two objects is different, then the heat travels from higher temperature to lower temperature.
Conduction is the transfer of energy when two objects ate in contact with each other. Convection is a transfer between object and environment. Radiation is when transferred by emission of electromagnetic radiation.
Thus, the correct option is A. Heat moves from warmer objects to cooler objects.
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You are given a food sample in powder form. How do you determine the food class of the food sample?
Answers
If I were given a food sample in powdered form I would determine the food class of the food sample by adding some water to it. By adding water to the Powder the nature of the the food can be easily determined based on the solubility of the Powder in water.
describe the pattern of the Lewis dot structures of the 18 elements (include periods and groups/famalies)
Answers
Lewis dot structures are diagrams that depict the interactions between atoms in molecules as well as any lone pairs of electrons that may be present.
What are Lewis dot structures?A Lewis electron dot diagram, also known as an electron dot diagram, Lewis diagram, or Lewis dot structure, is a diagram that employs dots to represent the valence electrons of an atom. The number of dots corresponds to the atom's valence electron count.
By including lines between atoms to represent shared pairs in a chemical bond, Lewis structures expand on the idea of the electron dot diagram.
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Write a balanced chemical equation for the incomplete combustion of methane to produce CO(g) as the only carbon-containing product.
Answers
Answer:
2CH4(g)+3O2(g)→2CO(g)+4H2O(g)
Explanation:
Start with methane (CH4) and the gas product CO. It is safe to assume that the remaining products and reactants are O2 and H2O. There we have an unbalanced equation CH4+O2->CO+H2O after which it can be balanced as above.
What is true about dominant alleles? a They almost never appear as the trait. b They appear as the trait only when there are two of them c They appear as the trait over a recessive allele d They appear as the trait if there is not recessive allele
Answers
They appear as the trait over a recessive allele. Statement C) is true about the dominant alleles.
Dominant alleles are genetic variants that, when present in an individual's genotype, are expressed phenotypically, meaning they determine the visible or observable traits. Dominant alleles are represented by capital letters, while recessive alleles are represented by lowercase letters in genetics.
In terms of inheritance, if an individual has at least one copy of the dominant allele, it will be expressed in the phenotype, regardless of the presence of a recessive allele. This is because dominant alleles exert their influence over recessive alleles, thus "dominating" their expression.
To illustrate this, let's consider a specific example using a trait controlled by a single gene with two possible alleles: dominant (A) and recessive (a). If an individual is homozygous dominant (AA), meaning they possess two copies of the dominant allele, the dominant trait will be expressed.
However, if an individual is homozygous recessive (aa), with two copies of the recessive allele, the recessive trait will be expressed since there are no dominant alleles to override it.
Therefore, dominant alleles appear as the trait over recessive alleles, regardless of the presence or absence of a recessive allele. The presence of even a single copy of the dominant allele is sufficient for its expression in the phenotype. Option C
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what voltage is required to move 2a through 20ω
Answers
Answer:
10 volts
Explanation:
V= P/I
V = 20/2 = 10 volts
Things that you learn through your senses during an experiment are
A. hypotheses
B. controls
C. observations
D. conclusion
Answers
Answer:
c- observations
hope this helps
Explanation:
electrictron configuration
Answers
Explanation:
So what do you wanna know? The definition?
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.
Predict if a reaction will occur when Cu and HBr are combined. If a reaction occurs, write a net ionic equation for the reaction.
(Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank. If no reaction occurs leave all boxes blank and click on "Submit".)
Answers
A net ionic equation for the reaction is :
Cu(s) + 2H⁺(aq) ----> Cu²⁺(aq) + H₂(g)
The reaction of Cu with HBr is given as :
Cu(s) + HBr(aq) ---> CuBr₂(aq) + H₂(g)
to balance the equation multiple 2 in HBr , we get the balance equation :
Cu(s) + 2HBr(aq) ---> CuBr₂(aq) + H₂(g)
write the complete ionic equation :
Cu(s) + 2H⁺(aq) + 2Br⁻(aq) -----> Cu²⁺(aq) + 2Br⁻(aq) + H₂(g)
now, cancel out the spectator ion from the equation, spectator ions are the same ion in the reactants and product side, we get :
Cu(s) + 2H⁺(aq) ----> Cu²⁺(aq) + H₂(g)
Thus, this is the net ionic equation of the reaction.
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1. a Use the valence electron molecular orbital diagram for F2 to propose ground state F2ions that satisfy the following conditions
(1.5 points) (i) A F2 ion that is paramagnetic and that has a non-integer bond order.
(1.5 points) (ii) A F2 ion that is paramagnetic and that has an integer bond order.
(1.5 points) (iii) A F2 ion that is diamagnetic and that has a bond order of 3.
Clearly show the charge on your ion, label all valence molecular orbitals, and show the corresponding electrons in their orbitals. Full calculations for bond orders must be included.
b) Using only the valence electron molecular orbital diagram for F2, is a ground state diamagnetic ion with a bond order of 2 possible? Write one or two sentences to explain why or why not.
Answers
The earth's crust is:
made of rock
the thinnest layer
broken into large pieces called plates
all of the above
Answers
Answer:
all of the above
Explanation:
have a nice day :-)
all of the above
Explanation: