Answer:
B
Explanation:
Heat moves as thermal energy from hot body to a cold body
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you dont have to write the essay but can someone just explain it to me please
and ill give brainliest ofc :)
Answer:
Basically, it is asking you to give an example of something that could replace nitrogen in the chemical, but would still produce the same result.
what is a significant figure of 0.502 ?
What is the frequency of a particular type of electromagnetic
radiation with a wavelength of 5.00 x 10-8 m?|
Answer:
f = 0.6× 10¹⁶ Hz
Explanation:
Given data:
Wavelength of radiation = 5.00 × 10⁻⁸ m
Frequency of radiation = ?
Solution:
Formula:
Speed of light = wavelength × frequency
speed of light = 3 × 10⁸m/s
Now we will put he values in formula.
3 × 10⁸m/s = 5.00 × 10⁻⁸ m × f
f = 3 × 10⁸m/s / 5.00 × 10⁻⁸ m
f = 0.6× 10¹⁶ s⁻¹
s⁻¹ = Hz
f = 0.6× 10¹⁶ Hz
The missing components in the table to the right
are indicated with orange letters. Use the periodic
table in the tools bar to fill in the corresponding
values.
Element
Electron
affinity
(kJ/mol)
Electro-
negativity
A
Bromine
324.6
2.96
B
B
Chlorine
А
00
С
Magnesium
0
С
D
Sodium
52.8
The missing components in the table to the right are indicated with orange letters. Use the periodic table in the tools bar and this link Web Elements to fill in the corresponding values. A B C D E F G. 2. See answers. Log in to add ... F = 737.7kJ/mol. G = 495.8kJ/mol. Explanation: We are asked some of the ...
2 answers
The missing components in the table to the right are indicated with orange letters. By using the periodic table and the tools bar corresponding values are (A) 349 (B) 3.16 (C) 1.31 and (D) 0.93.
What is Electron Affinity?The electron affinity of an atom or molecule is defined as electricity launched when electrons are introduced to the outermost shell. Electron affinity increases from left to right across a length.
What's Electronegativity?Electronegativity is described because the tendency of an atom attracts the bonded pair of electrons of covalent bond to itself. To a degree, the electronegativity Pauling scale is used.
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Cell phones are widely used by people all over the world as a medium of communication. When a person makes a call from a cell phone, the cell phone emits electromagnetic waves that are intercepted by a nearby cell phone tower. The cell phone tower then connects the call to the phone of the person being called.
Which of the following processes enables a cell phone to receive communications from a cell phone tower?
A.
Electromagnetic waves from the tower produce an electric current in the cell phone's internal circuit when intercepted by the phone's antenna.
B.
Electromagnetic waves from the tower are reflected by the cell phone, producing an electromagnetic field that is detected by the internal circuits of the phone.
C.
Electromagnetic waves diffract around the cell phone's antenna, which allows the waves to be detected by the internal circuits of the phone.
D.
Electromagnetic waves from the tower interfere with the radio waves emitted by the cell phone, producing electric currents in the internal circuits of the phone.
Answer:
A Electromagnetic waves from the tower produce an electric current in the cell phone's internal circuit when intercepted by the phone's antenna.
Explanation:
Its correct I just did it
The correct option is A which is when a cell phone's antenna picks up electromagnetic waves from a tower, the phone's internal circuit becomes electrically charged through which communication is enabled.
How does a cell phone receive communications from a cell phone tower?Radio waves are sent by mobile phones through a base station network, which is a collection of permanent antennas. Since radiofrequency waves are electromagnetic fields rather than ionising radiation like X-rays or gamma rays, they cannot ionise or destroy chemical bonds in living organisms.
A cell tower has several antennas linked to it, usually positioned on a head frame. Even more than 15 antennas per carrier are found on some towers. This figure largely depends on the performance, area of coverage, and capacity needs of the antenna.
Effect of 5G on health: There are growing worries that the higher intensity radiation from 5G could harm those living close to cell towers. According to theories, the harm done to human DNA by this rise in radiofrequency radiation will result in cancer, premature ageing, and disturbance of cell metabolism.
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Water particles are composed of Helium and Nitrogen
Answer:
No, Water Particles are composed of 3 Atoms.
2 hydrogen atoms, and 1 oxygen atom
Which is the more energetic, a red photon or a blue photon? Explain in terms of frequency and wavelength.
Answer:
Shorter waves vibrate at higher frequencies and have higher energies. Red light has a frequency of around 430 terahertz, while blue's frequency is closer to 750 terahertz. Red photons of light carry about 1.8 electron volts (eV) of energy, while each blue photon transmits about 3.1 eV.
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The value of delta at 25c for the formation of pocl3.
°ΔG rxn = -1108.7
Further explanationMaybe the question is like this
the value of ΔG° at 25 °C for the formation of POCl₃
Reaction
P₂(g)+O₂(g)+3Cl₂(g)⇒2POCl₃(g)
Formula
[tex]\tt ^o\Delta G_{rxn}=^o\Delta G_f~product-^o\Delta G_f~reactants[/tex]
You can find table to find ΔG° at 25 °C(298 K)
°ΔG POCl₃ = -502.5 kJ/mol
°ΔG O₂ and °ΔG Cl₂ = 0
°ΔG P₂ = 103.7 kJ/mol
[tex]\tt ^o\Delta G_{rxn}=2.^o\Delta G~POCl_3-^o\Delta GP_2\\\\^\Delta G_{rxn}=2.(-502.5)-103.7=-1108.7~kJ/mol[/tex]
If the weight of displaced liquid and the weight of an object are the same, the object will:
Answer:
Float
Explanation:
If the weight of liquid displaced and the weight of an object are the same, the object will float in the liquid.
From Archimedes principle, when an object is immersed in fluid, a force called upthrust supports it and it equal to the weight of the liquid displaced.
When in a liquid, the weight of the liquid displaced is the same as that of the of the object, it will float and not sink.
Which of these molecules has an overall dipole moment? O A. F2 B. H2S C. CH4 D. CO2
The molecules that have an overall dipole moment are H₂S. The correct option is B.
What is a dipole moment?A dipole moment is created when the charges are separated. There are two types of dipole: one is an electric dipole, which separates the negative and positive charge of an electromagnetic system.
Dipole moment is caused between ions when there is ionic bond and between atoms when there is a covalent bond. The dipole moment is formed when there is a difference in electronegativity.
The more the electronegativity, the dipole moment increases. The dipole moment of H₂S is 0.95 D. The electronegativity between hydrogen and sulfur is very high, therefore its dipole moment is also than others.
Thus, the correct option is C, H₂S.
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How many days does it take for 16 g of palladium-103 to decay to 1.0 g? The half-life of palladium-103 is 17 days.
Answer: It will take 68 days for the palladium to decay.
Explanation: ima smart dude
This reaction releases energy as heat. Explain whether the reaction is exothermic or endothermic and whether it obeys the law of conservation of energy
Answer:
Exothermic, it obeys the law of conservation of energy
Explanation:
The reaction is an exothermic change. In this kind of change, heat is liberated to the surrounding. So the surrounding becomes hotter at the end of the heat change.
In chemical reactions that involves the loss of energy as heat, they obey the law of conservation of energy.
The law of conservation of energy states that energy is neither created nor destroyed but transformed from one form to another. In such reactions as this, chemical energy is transformed into heat energy.
54. Copper(I) sulfide is formed when copper and sulfur are
heated together. In this reaction, 127 g of copper reacts
with 41 g of sulfur. After the reaction is complete, 9 g of
sulfur remains unreacted. What is the mass of copper
sulfide formed?
SEL
Ma
Answer:
159g
Explanation:
Copper (I) sulfide is formed by the chemical reaction between copper and sulfur. Copper is a limiting reagent that results in the formation of 190.26 grams of copper(I) sulfide.
What is a limiting reagent?A limiting reagent is defined as the reactant that gets completely utilized in the reaction and affects the amount of the product formation. On the contrary, the excess reagent is present in more amounts.
Given,
Mass of copper = 127 gm
Mass of sulfur = 41 gm
Moles of copper:
n = mass ÷ molar mass
n = 127 ÷ 63.546
n = 1.99
Moles of sulfur:
n = 41 ÷ 32.065
n = 1.27
The reaction is shown as:
Cu + S → CuS
Here, 9 g of sulfur remains unreacted and hence is an excess reagent, and copper being consumed is a limiting reagent.
Here, 1 mole of copper reacts to form 1 mole of copper sulfide hence, 1.99 moles of Cu produces, 1.99 moles of copper sulfide.
Mass of CuS is calculated as:
Mass = moles × molar mass
Mass = 1.99 mol × 95.611 g/mol
= 190.26 grams
Therefore, 127 gm of copper and 41 gm of sulfur produces 190.26 grams of copper sulfide.
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What two gases are produced during the electrolysis of water?
Answer:
hydrogen and oxygen.
Explanation:
How is light produced in an atom?
Answer:
light is the result of electrons moving between defined energy levels in an atom called shells.
Explanation:
when something exited an atom like collision with another atom or a chemical reaction, an electron may absorb energy boosting it to a higher level shell.
2) In a calorimetry experiment, 70.0 g of a substance was heated to
270.00 degrees Celsius and then placed in 3500.0 g of water. The water
bath's starting temperature was 15.00 degrees Celsius. If the substance's
listed specific heat is 0.890 J/gC, predict the temperature at thermal
equilibrium. *
onlar
The temperature at thermal equilibrium : 16.1 °C
Further explanationQ absorbed = Q released
Heat can be formulated :
Q = m.c.Δt
c= specific heat, J/g°C
Δt = temperature different, C°
m= mass, g
Q water=Q substance
[tex]\tt 3500\times 4.18\times (t_2-15)=70\times 0.89\times (270-t_2)\\\\14630(t_2-15)=62.3(270-t_2)\\\\14630t_2-219450=16821-62.3t_2\\\\14692.3t_2=236271\\\\t_2=16.1^oC[/tex]
NEED ASAP!!!
Sound energy travels by electromagnetic radiation.
True
False
false
Explanation:
..................................................................
Please help my teacher is rushing me
Round off the measurement 0.002 015 5 m to three significant figures.
Answer:
0.002
Explanation:
The significant figures of a number are digits that are meaningful in trying to resolve a given value. These are actually digits that carry meaning in a given number.
Let s look at 0.002, the zero before the decimal point carries no real meaning in the number. However, the zeros that precede 2 are all meaningful because the occupy the tenth and hundreth place values.
Hence, there are three significant figure in 0.002.
Answer:
Explanation:
Boi
ERGENT!!!!!!!!!!!: A runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running. [1 Calorie = 4.184 kJ] Which of the following statements is TRUE? (Select ALL that apply) *
A. There were 3,140 kJ of energy in the snack.
B. There were 1,570 kJ of energy in the snack.
C. During her run, she used 755 Calories of energy.
D. During her run, she used 189 Calories of energy.
E. The runner used fewer Calories while running than she consumed during her snack.
F. The runner used more Calories while running than she consumed during her snack.
Answer:
B. There were 1,570 kJ of energy in the snack.
C. During her run, she used 755 Calories of energy.
F. The runner used more Calories while running than she consumed during her snack.
Explanation:
According to this question, a runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running.
Since 1 Calorie = 4.184 kJ, it means that the runner consumed 375 × 4.184 = 1570 kJ of energy. In other words, THERE WERE 1,570 kJ OF ENERGY IN THE SNACK.
Also, the runner burns 3,160 kJ while running meaning that she equivalently burnt 3160/4.184 = 755.258 calories. Approximately, 755 calories of energy were burnt by the runner while running.
In a nutshell, the runner consumed 375 calories of energy in her snack but used up 755 calories while running. This means that the runner used more Calories while running than she consumed during her snack.
In animals. energy is produced by the:
A. endoplasmic reticulum
B. nucleus
C. mitochondria
D. chloroplast
a summary about a gas 5 sentences
Answer:
Gases have two properties that set them apart from solids and liquids. First, gases spontaneously expand to fill the container they occupy, no matter its size. In other words, a gas has no fixed volume or shape. Secondly, gases are easily compressible.
Explanation:
Hope this helps
what is Bohr's atomic model?
Answer:
The Bohr model and all of its successors describe the properties of atomic electrons in terms of a set of allowed (possible) values. Atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Direct experimental evidence for the existence of such discrete states was obtained (1914) by the German-born physicists James Franck and Gustav Hertz.
Explanation:
12. What is a metal on the periodic table? What is a nonmetal? (Relative to the
metalloid staircase)
Answer:Metals are left of the Metalloid stair case and non metals are right
Explanation:
Pick any metal on the periodic table (left of the staircase). Aluminum, Calcium, Lead, anything but Hydrogen.
Non-metals are found on the right side of the staircase. Chorine, Iodine, Carbon, etc
**Keep in mind that not all solids are metalloids.
When an object such a a stone is dropped into water, it disturbs the surface of the water. Waves form at the surface of the water and travel outward from the point of the disturbance.
The diagram below is based on a single frame from a video of the waves that formed when a stone was dropped into water.
If a student were to measure the distance labeled as "Z," she would know the value of the _______ of the wave.
A.
radius
B.
amplitude
C.
frequency
D.
wavelength
Answer: sorry i’m late but the answer is D- wavelength :)
Explanation:
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Explanation:
Which metals have more than one charge?
Explanation
A few elements, all metals, can form more than one possible charge. For example, iron atoms can form 2+ cations or 3+ cations. Cobalt is another element that can form more than one possible charged ion (2+ and 3+), while lead can form 2+ or 4+ cations.
How could a synthetic material such as Acegram affect society?
Explanation:
Synthetic fiber or synthetic fibre (in British English; see spelling differences) are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms. They are the result of extensive research by scientists to improve upon naturally occurring animal and plant fibers. In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. Synthetic fibers are created by a process known as polymerization, which involves combining monomers to make a long chain or polymer. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer). There are two types of polymerization: linear polymerization and cross-linked polymerization.
Synthetic material are madeup of monomers and long chain of monomers are known as polymers. The process is known as polymerization and the synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.
What is synthetic material?Synthetic materials are microplastic pollution and madeup up of polymers which is a long chain of polymers and the process is known as polymerization.
The synthetic materials are often converts into microplastic that takes a long period of time to decompose and they are also responsible for generation of greenhouse gases.The synthetic material which is popularly known is nylon which is very tough to recycle.
Therefore,synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.
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N2 + 3H2 Right arrow. 2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..
Answer:
53.4%
Explanation:
N₂ + 3H₂ → 2NH₃
Given that:
26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃
Then:
The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)
= 13.05 mol of H₂
The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)
= 8.697 mol of NH₃
The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃
The percent yield = actual yield/ theoretical yield * 100%
The percent yield = ( 79.0 g/ 148.1 g )* 100%
The percent yield ≅ 53.4 %
Answer:
53.4
Explanation:
It is difficult to burn a heap of green leaves but dry leaves catch fire easily.
Explain.
Answer:
i dont really have explaining but see green leaf have some amount of water and chlorophyll so it doesn't get burnt and dry leaves lose water and have no amount of them so they get burnt
HOPe It WiLl HeLp........