When cooking in the same pan and on the same burner setting, 250 ml (about 1 cup) of water will start to boil more quickly than 1 l (about 4 cups) of water. This is because 1 cup of water has a lower heat capacity than 4 cups.
The fact that it requires a lot of energy to heat water is one of its most important characteristics. To be precise, one calorie of heat must be absorbed by 4,184 Joules of water for one degree Celsius of temperature rise. To provide some context, 1 kilogram of copper can be heated to 1°C with just 385 Joules of heat.The quantity of heat needed to raise a mass unit of a substance's temperature by one degree is known as specific heat (C).The specific heat should be adjusted in accordance with the numbers and tables below when estimating mass and volume flow in a water heating system at higher temperatures.The specific heat is given at various temperatures (in degrees Celsius and Fahrenheit) and at water saturation pressure, which, in real-world applications, produces the same effect as atmospheric pressure at temperatures below 100 degrees Celsius (212 degrees Fahrenheit).Learn more about the Specific heat with the help of the given link:
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Please Help!!!!
If the atomic mass of an element is 22 and the atomic number of said element is 10, what is the number of protons, electrons, and neutrons in this element?
The element is Neon
The protons is the same as the atomic number (10 protons)
The electrons are the same as the number of protons in a neutral atom (10 electrons)
The neutrons can be found by subtracting the protons from the atomic mass (22-10=12 neutrons)
How much is one ounce of the element Radon (Rn) Please help!!!!!!!
The quantity of Radon (Rn) found in one ounce of the element = 28.35g
What is Radon (Rn)?Radon (Rn) is defined as the element found in the periodic table with the atomic number of 86 and molecular atomic mass of 222g.
The molar mass of the element Radon (Rn) = 222g.
But 1 ounce= 28.35 grams
X ounce = 222gramms
Make X the subject of formula;
X ounce = 222/28.35
= 7.8 ounce.
That is to say that, 7.8 ounce of Radon= 222g,
28.35 grams of Radon = 1 ounce.
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HELP ME PLEASE!! ASAP!!
Which of these pairs of elements is most likely to be part of a polyatomic ion?
Ba and O (Barium and Oxygen)
C and N (Carbon and Nitrogen)
K and Br (Potassium and Bromine)
Rb and Cl (Rubidium and Chlorine)
Answer:
Option B) Ba and O (Barium and Oxygen)
Explanation:
Barium and oxygen elements are the pairs which are most likely to be the part of polyatomic ion. As barium has +2 charge and Oxygen has -2 charge which will be settle once they form an polyatomic ion.
A mixture of lemon juice, bromothymol blue indicator, and indigo carmine indicator is prepared . What is the colur of this mixture?
A.yellow
B.blue
C.colourless
D.green
If an Oreo cookie is 0.69 cm thick (1 cookie = 0.69 cm), how many Oreos does it take to reach the moon if the moon is 3.84 x 10^8 m away from earth?
Answer:
66vhiib
Explanation:
could anybody help me with #4? thank you!
Answer:
well a carbon dioxide mole is equal to 44.0095 and when you times that by 6 ( since theres 6 moles ), you get 264.057 ( rounded to 264), so i think B is right
Explanation:
( sorry if im wrong)
What is the mechanical advantage of a lever with 2 meters between the input force and the fulcrum and 1 meter between the output force and the fulcrum
The mechanical advantage of a lever with 2 meters between the input force and the fulcrum and 1 meter between the output force and the fulcrum is 2.
For the equilibrium, the torque about the fulcrum due to input force(Fin) equals the torque due to output force(Fout).
i,e
Fin x Linput = Fout x Loutput
MA = Fout / Fin = Linput / Loutput
MA = 2 / 1 = 2
What is force ?"Force" is a vector quantity that can be described as a push or pull on an object due to the interaction of an object with another object. When two objects interact, the objects experience an equal and opposite force on each other. In other words, both objects "force" on each other. Force exists only as a result of interaction. When there is no interaction, objects no longer experience a force. Force is measured in units called Newtons (N), named after the famous scientist Sir Isaac Newton.
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Explain why the sulfide ion (S²⁻) is larger than the chloride ion (Cl⁻).
Optional question (if you know the answer): Which atom/ion has the larger ionic size Li or Li₊
The sulfide ion (S²⁻) is larger than the chloride ion (Cl⁻).
According to the question , sulfide ion (S²⁻) is larger than the chloride ion (Cl⁻) . the atomic number of sulfur 16 and chlorine is 17
sulfur .
atomic number of sulfur is 16,
now, S²⁻ = 18 electrons
Cl⁻ = 18 electrons
The no. of electrons in S²⁻ and Cl⁻ are same 18 electrons. But S²⁻ ion has one proton less than Cl⁻ ion. So, the attractive force between the nucleus and electron is more that's the reason Cl⁻ ion is smaller than S²⁻
Thus , the sulfide ion (S²⁻) is larger than the chloride ion (Cl⁻).
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pls help with this ill give you 50 pts
Compare the codes listed at the top of each drawing in Model 1 with the shapes in that box.
What do the letters R, Sq, and T in the codes represent?
What do the small numbers (subscripts) in the codes represent?
When atoms are touching, how is that communicated in the code?
What is the common characteristic of the samples in which an ampersand (&) is used?
In Model 1 there are three drawings that are labeled with a question mark. Write codes
properly label these drawings.
POGILT Activities for High School Ch-
a) R = square; Sq = round. Triangle = T. b) The little numbers (subscripts) in the codes indicate how many of a certain sort of atom there are in a given molecule.
What do the letters R sq and T in the codes stand for?Compare the forms in that box with the codes stated at the top of each design in Model 1. molecule.
a) What do the codes' letters R, Sq, and T stand for? R=Round. Sq Square T=triangle (atoms) (atoms).
b) The small numbers (subscripts) in the codes indicate how many atoms of a certain kind are present in molecule.
What is an element's one- or two-letter code?A one- or two-letter identifier of an element is known as a chemical symbol. The chemical symbols O for oxygen, Zn for zinc, and Fe for iron are a few examples.
A symbol's first letter is usually capitalized. The second letter of a symbol that has two letters is lowercase.
b) In the illustrations of Model 1, what does it signify when two atoms or molecules are not in contact? In the sample, the atoms or molecules are not bound to one another; instead, they are merely positioned near to one another.
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A chemist has synthesized two new dyes based on the molecular structure of plant-based dyes. The lowest energy absorption line for the first dye is light in the visible region at 530 nm. The lowest energy absorption line for the second dye is light in the visible region at 645 nm. Based on this evidence, which molecule has the larger homo-lumo gap?.
The molecule that has the highest HOMO - LUMO gap is the dye with absorption maxima at 530 nm.
What is the homo-lumo gap?We know that the term HOMO stands for the highest occupied molecular orbital while the LUMO stands for the lowest unoccupied molecular orbital of the molecule that is under consideration.
The HOMO - LUMO gap shows us the extent to which it is possible to have the electrons that in a conjugated system being promoted from the HOMO to the LUMO and this is also a measure of the degree of conjugation in the molecule.
Recall that when the wavelength is longer, it implies that the frequency is higher and that the LUMO - HOMO gap is not as wide. If the reverse is the case, then implies that the HOMO - LUMO gap is quite wide as is evident from what we have in the question as shown.
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_____ is the total amount of potential and kinetic energy of an object.
The state of matter
Temperature
Thermal energy
Potential energy
Answer:
thermal energy.
Explanation:
endothermic energy consists of the potential and kinetic energy in an object.
Answer:
it's correct answer is mechanical energy.Explanation:
but there is no option of mechanical energy
40.Dalton and Thomson agreed on that carbon atom...
A. Has no spaces within it.
C. Contains negative electrons
B. Is electrically neutral
D. Is a homogenous sphere
Dalton and Thomson agreed on that carbon atom - Is electrically neutral .
What is Dalton's Theory ?In the first section of his thesis, he claims that all matter is composed of indivisible atoms. According to the second component of the theory, the mass and characteristics of every atom in a specific element are the same. Compounds, according to the third section, are combinations of two or more different kinds of atoms.
1) Atoms make up all matter. Atoms are unbreakable and undivideable.
2) The mass and characteristics of every atom in a specific element are the same.
3) Two or more different types of atoms combine to create compounds. 4) Atoms are rearranged during a chemical process.
What is the charge of Electron ?The electron is the lightest known stable subatomic particle. It has a negative charge that is equivalent to 1.602176634 coulombs, which is regarded as the fundamental unit of electric charge. 9.1093837015 1031 kg, or just 1/1,836 the mass of a proton, is the rest mass of an electron.
By simply depositing a given number of electrons on one electrode of a capacitor and measuring the voltage, Vs, across the capacitor, it is possible to estimate the charge of the electron.
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7. Complete the concept map below.
Water Drainage
may result In
A.
Volcanic Eruption
may affect
Solar Activity
may result in
B.
Blosphere
may result in
C.
Drainage that is not handled properly can cause an increase in erosion, changes in stormwater runoff, flooding, and damage to water quality.
Natural Disaster?Large-scale geological or meteorological phenomena that have the potential to cause loss of life or property are considered natural disasters. Tornadoes and severe storms are examples of these catastrophes. Tropical Storms and Hurricanes. Floods.They release significant amounts of gas and dust into the atmosphere, particularly the upper atmosphere, which temporarily alters the climate on Earth.Large volcanic eruptions should be followed by a drop in the average surface temperature, which is actually seen and lasts for typically 1 to 3 years. Deforestation and the combustion of fossil fuels have detrimental environmental effects that directly affect the biosphere. Pollutant emissions and carbon dioxide have a negative impact on all types of life.To learn more about Natural Disaster refer to:
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How does increasing the surface area affect the motions of the molecules?
Increasing the surface area of a reactant increases the rate of collisions which also increases the reaction rate.
Why increasing the surface area affect the movement of molecules?Because increasing the surface area of an incentive increases the frequency of collisions and increases the reaction rate. some smaller molecules have more surface area than one large particle. further, the surface area that is available for particles to collide, a speedy reaction will occur. The rate of a chemical reaction can be elevated by increasing the surface area of a solid reactant. Molecular movement is affected by heat and temperature. because the temperature is the computation of the average kinetic energy of the molecules and acts for the motion of molecules. grow surface area is the most favored trend for better performance of gas sensor materials.
So we can conclude that So the larger the surface area of the solid, the faster the reaction will be.
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Which of the following is a hydrocarbon ?
a. Urea
b. Benzene
c. Ammonium cyanate
d. Phenol
Benzene is a hydrocarbon because it is made up of only carbon and hydrogen atoms. The molecular formula of Benzene is C6H6.
Hydrocarbons are those compounds that are made up of two kinds of atoms; carbon and hydrogen. Their general chemical formula is CxHy. Hydrocarbons are then further divided into different types like saturated and unsaturated hydrocarbons, aromatic hydrocarbons, aliphatic hydrocarbons, alicyclic hydrocarbons, etc.
Benzene is an aromatic hydrocarbon because it is made up of only carbon and hydrogen atoms that are joined together to form a ring shape.
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electron configurations are a shorthand form of an orbital diagram, describing which orbitals are occupied for a given element. for example, 1s22s22p1 is the electron configuration of boron. enter the complete electron configuration for arsenic ( as ).
1s^22s^22p^63s^23p^64s^23d^104p^3 is correct answer.
What is electron configuration ?
Electron configuration refers to the distribution of electrons in atoms and molecules.
Electron configuration can be defined as the specific arrangement of negatively charged electrons in different energy levels around atomic nuclei.
Electron configuration can also be used to represent the bonds that connect different atoms in a molecule.
Moreover, an electron orbital refers to the function that describes the location and behavior of electrons in a given atom.
In conclusion, electron configuration refers to the distribution of electrons in atoms and molecules.
The atomic number of arsenic is 33.
Write the electronic configuration as follows:
1s^22s^22p^63s^23p^64s^23d^104p^3
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I need help with this question can someone help me with it
Answer:
I believe there is 4!
Explanation:
Valence electrons are electrons located in the outer shell of an atom.
Answer:
4
Explanation:
Valence electrons are electrons located in the outer shell of the atom.
Consider an atom whose nucleus contains 30 neutrons and has a charge equal to +4 x 10 ¹8 C. -18 a) Calculate the atomic number and the mass number of this atom. b) How many electrons does this atom have?
Atomic Number = 30
Mass Number = 30 + 30 = 60
The atomic number, sometimes referred to as nuclear charge number, of a chemical element is the charge number of an atomic nucleus. This is the number of protons present in the nucleus of each atom of that element, or the proton number, for conventional nuclei. The atomic number of common chemical elements can be used to uniquely identify certain elements.
The number of neutrons and protons in an element determines its mass number: Protons and neutrons together make up mass. Simply deduct the number of protons, or atomic number, from the mass number to get how many neutrons an atom has.
The neutron, symbol n or n0, is a subatomic particle with a neutral charge and slightly more mass than a proton. Protons and neutrons make up an atom's nucleus.
The electron is a subatomic particle with a negative one elementary charge electric charge. The first generation lepton particle, the electron, is usually regarded as an elementary particle because it has no components or substructure.
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How do weathering and deposition differ?
Group of answer choices
A) Weathering has to do with air; deposition has to do with plants.
B) Weathering breaks down rocks; deposition leaves them in new places.
C) Weathering can be chemical or physical; deposition is only chemical.
D) Weathering occurs only in summer; deposition occurs year-round.
Answer:
It would be c
Explanation:
Most scientists believe that perpetual-motion devices can never be invented, but people come up with new ideas for them all the time. Do you think people should keep trying? Why ?
Yes, I believe that people should keep trying. As many attempt we made as nearest possible outcome we get.
As we know that, practice make a man perfect. If we stop doing practices in the believe that this work is impossible then we never make it possible. But if we keep trying we always get outputs. Most scientists believe that perpetual-motion devices can never be invented, but people come up with new ideas for them all the time. Be always be confidence.
In this example we see that if people not think about making such type of device it never been happen. There is no shortcut way to obtain great goal. We never give up or lose our hope in just one attempt.
Thus I concluded that people should keep trying. As many attempt we made as nearest possible outcome we get. Do as many time until you not reach to your goal.
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How do you obtain the absorbance value at a selected wavelength for the absorbance spectra of each of the solutions that you prepare?.
The absorbance value at a selected wavelength for the absorbance spectra of each of the solutions can be determined by using Beer's law.
What is Beer's law?
According to Beer's rule, the absorbance is inversely proportional to the concentration of the absorbing substance at constant route length. When an is a constant that depends on the medium, the absorbing substance, and the light's wavelength, and b is the path length, C is the concentration (solvent and other components).
The absorbance value for each spectrum is calculated at a certain wavelength. In general, it is desirable to choose a wavelength where the absorbance is at its highest because this will reduce the measurement's relative inaccuracy. The next step is to create a Beer's Law plot showing absorbance vs. concentration.
Hence using the Beer's law we can easily calculate the absorbance value at a selected wavelength for the absorbance spectra of each of the solutions that we prepare.
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How does increasing the amount of IMF a molecule can have form influence its boiling point?
Answer:
The increase in the IMF in a molecule means that it will also be increasing in the boiling point.
Explanation:
IMF are important in this because they let you know which bonds are stronger than others.
For example, a hydrogen bond is much stronger than a dipole-dipole bond. And an ionic bond is much stronger than a hydrogen bond.
As you go increasing in IMF strength, that means that it will be harder for them to separate. This is why as the IMF bonds are increasing in strength, their boiling points will also be increasing because they would need more energy in order to be separated.
Sodium-22 undergoes positron emission as shown:
AiNa - ANe + 93
If this decay has a half-life of 2.60 years, what mass of 72.5 g
sodium-22 will remain after 15.6 years?
q
A nucleus can split into two or more particles due to the instability of the nucleus.
Radioactive elements usually have unstable nuclei.
General decay formula:
[tex]N_{t} = N_{0} (1/2)^{t}/t^{1/2}[/tex]
T = duration of decay
t 1/2 = half-life
N₀ = number of initial radioactive atoms
Nt = number of radioactive atoms remaining after decay T - h
half-life = t 1/2 = 2.6 years
T = 15.6 years
No = 72.5 g
Nt = 72.5.[tex]1/2^{15.6/2.6}[/tex]
Nt = 72.5.[tex]1/2^{6}[/tex]
Nt = 1.13g
Na22 is produced by cosmic rays that induce the fragmentation of atmospheric argon. However, measurements have shown that Na22 is also produced during nuclear weapons testing. His Na22 fallout observed at Heidelberg was about 20 times higher than natural production in 1963 and about 11 times higher in 1964. Sodium 22 is an artificial isotope with a half-life of 2.6 years. It emits a positron and decays into the stable Neon 22 β+ decay. A small fraction of the attenuation of 0.06% leads directly to the neon ground state.
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What did thomson contribute to the model of the atom? responses the electron cloud the electron cloud the nucleus the nucleus the neutron the neutron the electron
The model of the atom is the electron.
Experiments with JJ Thomson's cathode ray tube showed that all atoms contain small negatively charged subatomic particles or electrons. Thomson proposed a plum pudding model of an atom in which negatively charged electrons are embedded in a positively charged soup. In 1897, Thomson discovered the electron and proposed a structural model of the atom.
His research also led to the invention of the mass spectrometer. According to Thomson's atomic model, atoms consist of positively charged spheres injected with negatively charged electrons. Since electrons and protons are the same sizes the atom is electrically neutral. Thomson discovered the electron through experiments with Crookes or cathode ray tubes. He showed that cathode rays are negatively charged. In addition, he also studied positively charged particles in neon gas.
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Who first developed a mathematical expression to relate the visible wavelengths of light emitted by the hydrogen atom?.
Answer:
Niel Bohr in 1913.
Niel conducted experiments with Hydrogen atoms and tried to correlate their emission spectrum with the "atomic fingerprint" he would get for the atom.
Unfortunately, his calculations only worked on the Hydrogen atom.
**Bohr constructed the Bohr model, which is the structural model of an atom.
when copper is heated with an excess of sulfur, copper(i) sulfide is formed. in a given experiment, 2.14 g of copper was heated with excess sulfur to yield 1.76 g of copper(i) sulfide. what is the percent yield?
When 2.14 g of copper was heated with excess sulfur to yield 1.76 g of copper(i) sulfide, the percent yield is 65.67%.
Calculate the number of mole of Cu₂S produced from the reaction.
2Cu + S ⇒ Cu₂S
2 moles Cu when heated with excess sulfur will produce 1 mole Cu₂S.
Convert the mass of copper to moles.
n = mass/MM
n = 2.14 g / 63.546 g/mol
n = 0.03367639191 mol Cu
Theoretically, 2.14 g Cu or 0.03367639191 mol Cu will produce 0.01683819595 mol Cu₂S.
2 moles Cu / 1 mole Cu₂S = 0.03367639191 mol Cu / 0.01683819595 mol Cu₂S
Convert the theoretical yield in moles to mass.
theoretical mass Cu₂S = n x MM
theoretical mass Cu₂S = 0.01683819595 mol Cu₂S (159.1570 g/mol)
theoretical mass Cu₂S = 2.679916753 g
Solve for the percent yield using the formula below.
% yield = actual yield / theoretical yield x 100
% yield = 1.76 g / 2.679916753 g x 100
% yield = 65.67%
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How many Joules of energy are there in one photon of orange light whose wavelength is 630nm?
The energy are there in one photon of orange light whose wavelength is 630nm is [tex]3.15401\times10^{-19}[/tex] Joules.
W=c/v, c=speed of light, v=frequency
[tex]6.3 \times 10^-7=3 \times 10^8/v[/tex]
[tex]v=3 \times 10^8 / 6.3 \times 10^-7[/tex]
[tex]v=4.76 X 10^14 Hz[/tex]-frequency of the yellow light.
E=hv, h=Planck's constant,
[tex]E=(4.76 \times 10^14)Hz \times 6.62607×10^-34 J s[/tex]
[tex]E=3.15401\times10^{-19}[/tex] Joules- the energy of a single photon of yellow light.
What is Planck's constant?Planck's constant or Planck's constant, is a fundamental physical constant of quantum mechanics. The constant gives the ratio of the energy of the photon to its frequency, and for mass-energy equivalent, the ratio of mass to frequency.
In quantum mechanics, energy is exchanged and absorbed in certain amounts called quanta. The Planck constant is a number that defines the amount of energy in these quantities and expresses how small things can be. Learn more about Planck's constant in this infographic.
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Atoms of an element are most likely to lose 3 electrons when forming
an ion.
Which option most likely describes the periodic table group this
element belongs to?
Select one:
Group 14.
O Group 16.
O Group 13.
Group 17.
There are three parts to the cell theory. Which is NOT one of those parts?
Question 1 options:
A) All organisms are composed of one or more cells
B) The cell is the basic unit of structure and organization in organisms.
C) Cells spontaneously arise from carbon and nutrients carried in the bloodstream.
D) All cells come from pre-existing cells.
