Answers
Answer:
It's C.
Explanation:
According to the site, "http://needtoknow.nas.edu/energy/energy-sources/renewable-sources/wind/" ... "Wind energy is an indirect form of solar energy created by a combination of factors, including the uneven heating of Earth’s atmosphere by solar radiation, variations in topography, and the rotation of Earth. People have been putting wind energy to use throughout history to propel sail boats, mill flour from grain, and pump water."
Related Questions
If 25.0 g NO are produced, how many grams of nitrogen gas are used?
A: 5.84 g
B: 11.7 g
C: 23.3 g
D: 33.6 g
Answers
Based on the assumption that the reaction involves N and O to produce NO, if 25.0 g of NO are produced, the amount of N gas used would be 11.66 grams
Stoichiometric calculationFrom the equation of the reaction:
N + O ---------> NO
Mole ratio of N to NO is 1:1
Mole of 25.0 g of NO = 25/30.01 = 0.833 moles
Equivalent mole of N = 0.833 moles
Mass of 0.833 moles N = 0.833 x 14 = 11.66 grams
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Distinguish between single and double replacement reactions and give an example of
each.
Answers
Answer:
Anabolism builds complex molecules from simpler ones, while catabolism breaks large molecules into smaller ones.
Explanation:
4. One mole of H2O has a mass of 18g. How many moles of H,0 are there in 54g of
H2O?
Answers
Answer: 3 moles
Explanation: Divide 54 by 18 to get 3.
How many molecules are in 50.000 g of aspartame?
Answers
Aspartame stands for C_14H_18N_2O_5
Molar mass:-
14(12)+18(1)+2(14)+5(16)168+18+28+80294g/molNo of moles:-
Given mass/molar mass50000/294170mol(Approx)No of molecules:
No of moles×Avagadro no170×6.022×10²³1023.7×10²³1.02×10²⁶moleculesBarium nitrate Ba (NO3)2 is used to produce a green colour in fireworks. It is the product of Barium Hydroxide with HNO3. Propose its balanced chemical equation
Answers
The balanced chemical equation for the reaction between barium hydroxide, Ba(OH)₂ and HNO₃ to produce barium nitrate, Ba(NO₃)₂ is
Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + 2H₂O
What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The reactants are located on the left side while the products are located on the right side.
Reactants —> Products
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to write the balanced equationBa(OH)₂ + HNO₃ —> Ba(NO₃)₂ + H₂O
There are 2 atoms of N on the right side and 1 atom on the left side. It can be balanced by writing 2 before HNO₃ as shown below:
Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + H₂O
There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balanced by writing 2 before H₂O as shown below
Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + 2H₂O
Now, the equation is balanced
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Question 6 of 10
What does it mean when a reaction is spontaneous?
O
A. The reaction requires added energy.
B. The reaction goes to completion.
C. The reaction occurs rapidly.
O O
D. The reaction happens by itself.
SUBMIT
Answers
Answer:
D
Explanation:
Does not require energy ...may be slow or fast....
The attractions between anions and cations throughout a crystal are known collectively as.
Answers
The attractions between anions and cations throughout a crystal are known collectively as ionic bonds.
What are ionic bonds?The ionic bonds are a special type of bond where ions (cations and anions) are mutually attracted.
The ionic bonds are fundamental bonds for the development of certain compounds and molecules.
Ionic bonds may be produced between metal compounds that lose electrons (e-) and non-metals that gain e-.
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Carbon 14 decays to Carbon 12 and has a half-life of 5730 years. If a fossil is analysed and it has 5 grams of Carbon 14 and 15 grams of Carbon 12, how old is the fossil?
Answers
Answer:
im sorry but this question doesnt make sense
Explanation:
2.
What is the temperature when the volume is 4L? The original temperature is 200K and the
original volume is 5L.
Answers
Answer:
160
Explanation:
p*v/t = constant
or
p1*v1/t1 = p2*v2/t2
pressure is not stated in question so we get rid of it on both sides
v1/t1 = v2/t2
we are finding temperature so we flip the entire equation
t1/v1 = t2/v2
200/5 = t2/4
4(200/5) = t2
=160
Answer:
Yes it is 160K as the first person said
How much heat is absorbed when 70 grams of
water is completely vaporized at its boiling
point?
Answers
Answer:
Thus, the joules of heat absorbed when 70.0 grams of water is completely vaporised at its boiling point are 158,200.
Please answer.
A solar energy project is expected to have capital costs of $995,000, average yearly operating costs of $175,000, and a lifetime of 25 years. If the total production during the lifetime of the project is 89,500,000 kWh, what is the Levelized cost of energy (LCOE)?
a.$0.60 per kWh
b.$0.77 per kWh
c.$0.06 per kWh
d.$0.07 per kWh
Which of the following is a characteristic of Levelized cost of energy (LCOE)?
a. It is the minimum price per kWh at which electricity must be sold to break even over the lifetime of a power-generating project.
b. It is the maximum amount of power that can be produced per dollar over the lifetime of a power-generating project.
c. It is the maximum price per kWh at which electricity must be sold to break even over the lifetime of a power-generating project.
d. It is the minimum amount of power that can be produced per dollar over the lifetime of a power-generating project.
Which of the following statements is true for both solar energy and wind energy?
a. Energy is able to be collected both day and night.
b. Power from this energy source can easily be integrated into existing power grid systems.
c. Power generation using this energy source does not contribute to water pollution.
d. Energy collection equipment can be installed in agricultural areas without affecting crop production.
Answers
The Levelized Cost of Energy of the solar plant is $0.60 per kWh.
Solar energy and wind energy can both easily be integrated into existing power grid systems.
What is Levelized Cost of Energy?The Levelized Cost of Energy is a measure of the average net present cost of electricity generation for a generating plant over its lifetime.
The Levelized Cost of Energy of the solar energy product is calculated as follows:
Total cost over 25 years = 995,000, + $175,000 × 25 = $5,370,000
Total energy production over 25 years = 89,500,000 kWh
Levelized Cost of Energy = $5,370,000/89,500,000 kWh
Levelized Cost of Energy = $0.60 per kWh
The Levelized cost of energy (LCOE) is the minimum amount of power that can be produced per dollar over the lifetime of a power-generating project.
For solar energy and wind energy, power from both energy sources can easily be integrated into existing power grid systems.
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Answer:
one.
Which of the following statements is true for both solar energy and wind energy?
Power generation using this energy source does not contribute to water pollution.
2.
Which of the following is a characteristic of levelized cost of energy (LCOE)?
It is the minimum price per kWh at which electricity must be sold in order to break even over the lifetime of a power-generating project.
3.
A solar energy project is expected to have capital costs of $995,000, average yearly operating costs of $175,000, and a lifetime of 25 years. If the total production during the lifetime of the project is 89,500,000 kWh, what is the levelized cost of energy (LCOE)?
$0.06 per kWh
Explanation:
if you dont believe me thats all right i did it the answers are 200% you can check it for yourself
describe how to separate iron fillings, iron (II) chloride crystals and sulphur powder all separately
Answers
Answer:
1. Place in a platic bag and use a magnet to attract the iron filings. [See explanation for an alternative step].
2. Disolve the remainer in water
3. Pass the liquid through a microporous filter to capture the undissolved sulfur
4. Evaporate the filtered water to retrieve iron chloride crystals
Explanation:
The Fe(II) chloride will dissolve in water. It is paramagnetic, and thus is weakly attracted to a magnet. The process above should not result in attracting the solid Fe(II) crystals. In fact, it is probably acceptable to dissolve the entire sample in water as the fisrt step. The dissolved Fe(II) chloride should also not be strongly attraced to a magnet, and htis step would allow easier separation of the iron filings.
Sulfur is not soluble in water, so it will collect as a dsolid in the microporous filter.
The Fe(II) has a high solubility, so it will wind up in the filtered soluition. Evaopate using heat or vacuum to retrieve the solid Fe(II) chloride crystals (they will be hydrated).
What are the five major lines of latitude?
Answers
Answer: Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, and the Antarctic Circle. Hope this helps.
Balance the equation first.
N2 + H2 -> NH3
a) Find how many moles of NH3 are produced when 4.9 moles of N2 are completely reacted with hydrogen.
b) how many moles of H2 are required to produce 59.4 moles of NH3?
Answers
Answer:
Therefore, 12 moles of hydrogen makes 8 moles of ammonia.
Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3.
Explanation:
;)’ hola
Question 4 of 10
Match the feature with its description.
Sinkholes
?
Hang from cave ceilings.
Stalagmites
?
Grow from cave floors.
Stalactites
?
Collapsed caves.
Speleothems
?
Cave features.
Speleothems
Answers
Answer:
Stalactites - Hang from caves ceilings
Stalagmites - Grow from cave floors
Sinkholes - Collapsed caves
Speleothems - Cave features
Explanation:
Got it right :)
9. A 2.00 L flask is filled with propane gas (CH) at a pressure of 1.00 atm and a
temperature of -15.0°C. What is the mass of the propane in the flask?
Answers
the correct amswer is 4.17g
Explain how DNA can provide some evidence for evolution.
Answers
The shared ancestry of life is reflected in DNA and genetic code. DNA comparisons can reveal how closely two species are related. Biogeography. Evolution and geological change are reflected in the global distribution of life and the particular characteristics of island species.
Why do chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle??
Answers
Chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle because they produce gas without generating heat.
What is kipp's appratus & woulf's bottle?Kipp's appratus and woulf's bottle both are the laborartory appratus and used in the analytical process of any reactions.
Hydrogen sulphide gas will be produced in the laborartory by using both given appratus but we prefer the use of kipp's apparatus because in this apparatus small amount of gas is produced in the controlled heat condition by the reaction between the liquid sulphuric acid and solid iron sulphide.
Hence we prefer kipp's appratus as it produces gas without heat.
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How are elements organized on the modern periodic table?.
Answers
Answer:
They are organized from least to greatest by their atomic number.
Explanation:
Hope that helps!
Answer:
Explanation:
Elements are listed in numerical order by atomic number. The atomic number is the number of protons in an atom of that element. So element number 1 (hydrogen) is the first element. Every atom of hydrogen has 1 proton. Until a new element is discovered, the last element on the table is element number 118. Every atom of element 118 has 118 protons. This is the biggest difference between today's periodic table and Mendeleev's periodic table. The original table organized the elements by increasing atomic weight.
Each horizontal row on the periodic table is called a period. There are seven periods on the periodic table. Elements in the same period all have the same electron ground state energy level. As you move from left to right across a period, elements transition from displaying metal characteristics toward nonmetallic properties.
Each vertical column on the periodic table is called a group. Elements belonging to one of the 18 groups will share similar properties. Atoms of each element within a group have the same number of electrons in their outermost electron shell. For example, elements of the halogen group all have a valence of -1 and are highly reactive.
There are two rows of elements found below the main body of the periodic table. They are placed there because there wasn't room to put them where they should go. These rows of elements, the lanthanides and actinides, are special transition metals. The top row goes with period 6, while the bottom row goes with period 7.
Each element has its tile or cell in the periodic table. The exact information given for the element varies, but there is always the atomic number, the symbol for the element, and the atomic weight. The element symbol is a shorthand notation that is either one capital letter or a capital letter and a lowercase letter. The exception is the elements at the very end of the periodic table, which have placeholder names (until they are officially discovered and named) and three-letter symbols.
The two main types of elements are metals and nonmetals. There are also elements with properties intermediate between metals and nonmetals. These elements are called metalloids or semimetals. Examples of groups of elements that are metals include alkali metals, alkaline earths, basic metals, and transition metals. Examples of groups of elements that are nonmetals are the nonmetals (of course), the halogens, and the noble gases.
Use the particle of theory why do solid do not flow.
Answers
Answer:
Solids dont flow because there is a strong attraction between the atoms, keeping them bonded together tightly.
Explanation:
They will continue being solid until temperature is increased at the melting point.
How many energetically equivalent ways can you distribute the particles in system a?.
Answers
The number of energetically equivalent ways that one can distribute the particles in system A and B are 1 and 6 respectively.
How to calculate the number of ways?From thx complete information, system A has only 1 distribution that's possible.
For system B, the number of ways will be:
= 3 × 2 × 1
= 6
In conclusion, the correct options are 1 and 6 respectively.
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A Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C . The concentration of Cu2+ in the cathode is 1.6×10−3 molL−1 .
What is the concentration of Cu2+ in the anode?
Answers
For a Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C, the concentration is mathematically given as
c1=2.7*10^6.77m
What is the concentration of Cu2+ in the anode?Generally, the equation for the Chemical reaction is mathematically given as
Cu---->cu +2^e O
2e+Cu+2 ---->Cu R
Therefore
[tex]Ecell=\frac{0.0591}{n}log(c2/c1)\\\\0.25=\frac{0.0591}{2}log(1.6*10^{-3}/c1)[/tex]
c1=2.7*10^6.77m
In conclusion, the concentration is
c1=2.7*10^6.77m
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What chemistry law is the reason we balance chemical reaction equations?
Answers
Answer:
Law of Conservation Matter
Which gland of the endocrine system is located near the brain?
Answers
Answer:
The pituitary gland is located below the brain. :)
Using the notation just described, represent a cell based on the following reaction:
ClO3−(aq)+3Cu(s)+6H+(aq)→Cl−(aq)+3Cu2+(aq)+3H2O(l)
Pt is used as an inert electrode in contact with the ClO3− and Cl− .
Drag the appropriate labels to their respective targets. For neutral species, leave the pink target blank.
Answers
The cell notation of the redox reaction between Cu and ClO₃⁻ is:
Cu/Cu²⁺//ClO₃⁻//Cl⁻/PtWhat is a voltaic cell?A voltaic cell or electrochemical cell is a device which produces electricity from chemical reactions occuring within the cell.
The reactions occuring in a voltaic cell are redox reactions.
Oxidation occurs at the anode while reduction occurs at the cathode.
In the given reaction between Cu and ClO₃⁻ as shown below:
ClO₃⁻ (aq) + 3 Cu (s) + 6H⁺ (aq) → Cl⁻ (aq) + 3 Cu²⁺ (aq) + 3 H₂O (l)Cu is oxidized as follows: 3 Cu (s) → 3 Cu²⁺
ClO₃⁻ is reduced as follows: ClO₃⁻ (aq) → Cl⁻ (aq)
The voltaic cell notation is as follows where Pt is used as an inert electrode in contact with the ClO₃⁻ and Cl⁻:
Cu/Cu²⁺//ClO₃⁻//Cl⁻/PtTherefore, the cell notation of the redox reaction between Cu and ClO₃⁻ shows that Cu is oxidized while ClO₃⁻ is reduced.
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Question 4 of 10
What effect does adding a solute have on the freezing point of a solution?
A. The solution will not reach a freezing point temperature.
B. The temperature at which the solution freezes is raised.
C. The temperature at which the solution freezes is lowered.
D. The temperature at which the solution freezes is unchanged.
Answers
Answer:
C. The temperature at which the solution freezes is lowered.
If 86.4dm^3 of carbon dioxide gas contains N × 10^23 molecules at room temperature and pressure, find the value of N.
Answers
At T 25 ° C (298 K) and P 1 atm are stated by RTP ⇒ Vm = 24.4 liters / mol
86.4 dm³ = 86.4 L = 86.4/24.4 = 3.54 mol
1 mole = 6.02.10²³ molecules
3.54 x 6.02.10²³ = 21.31 x 10²³ molecules
N = 21.31
The co32- ion is an example of a polyatomic ion with ________. a. a nonpolar bond b. linear structure c. resonance structures d. triple bonds
Answers
The Co32- ion is a polyatomic molecule and have resonance structure
What is resonance structure?Resonance structures refer to different sets of Lewis structures that depict and explain the delocalization of electrons in a polyatomic ion or a molecule.
What are polyatomic molecules?Polyatomic molecules are molecules that are electrically neutral and have three or more atoms held together by covalent bonds. Examples are So3, Co3 and so on.
Therefore, The Co32- ion is a polyatomic molecule and have resonance structure.
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What element is used to reduce ni cations in nickel ore to form metallic nickel? enter its chemical symbol.
Answers
Carbon monoxide with pressure pCO = 0.01 at 800°C is use to reduce the nickel oxide to metallic nickel.
The chemical symbol is CO.
Nickel Extraction?Nickel can be extracted from it's ore through extractive metallurgy. This entails the process of conventional roasting and reduction processes of nickel ore which will produce nickel metal which is greater than 75% purity. In stainless steel applications, 75% pure nickel can be used without been purified furthe purification which depend the components impurities of impurities present in it. Carbon monoxide is use as the reducing agent as it reduce it from nickel oxide to nickel metal.
Therefore, Carbon monoxide with pressure pCO = 0.01 at 800°C is use to reduce the nickel oxide to metallic nickel.
The chemical symbol is CO.
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Choose the correct option:
Answers
Answer:
i think your answer is d
Explanation:
sorry if it is wrong