Answer:
tomic size is the distance from the nucleus to the valence shell where the valence electrons are located. Atomic size is difficult to measure because it has no definite boundary. The electrons surrounding the nucleus exist in an electron cloud.
Explanation:
Answer:
Atomic size is the distance from the nucleus to the valence shell where the valence electrons are located. The separation that occurs because electrons have the same charge. The number of protons in the nucleus. The core electrons in an atom interfere with the attraction of the nucleus for the outermost electrons. and Molecular size is a measure of the area a molecule occupies in three-dimensional space. The amount of space any mass takes up in three-dimensional space is known specifically as its volume.
The Rocky Mountains run parallel to the western coast of the United States. While parts of the California coast are lush and tropical, the area just east of the mountain range is a dry desert. What BEST explains the drastic climate difference between these two adjacent areas?
Answer:
The mountains cause rainfall.
Explanation:
The fact that the mountains run parallel to the coast is the key in the difference in climate between the two areas. Since they are parallel to the sea, they block the wind and moisture coming from the sea towards the land, the mountains cause this air to rise and when it hits the cold air at higher altitudes, it results in rain. This leads to the lush and tropical areas whereas without the parallel mountains to the coast, the amount of rain the area receives decreases, resulting in a desert like environment.
I hope this answer helps.
Can someone please explain to me how I’m supposed to figure out the element with these configurations??
3
In which of the following states of matter are the particles very far apart so they can fill their containers?
A.
gases only
ОВ.
solids, liquids, and gases
solids and liquids only
C.
D.
solids only
Reset
Submit
Answer:
A. gases only
Explanation:
It is only in gases that the particles are very far apart so they can fill their contains.
There are four major states of matter which solid, liquid, gases and plasma.
Particles of a gas have very weak attractive forces between them. They do not have fixed volume nor shapeThey easily fill up any containers they are put into. Gases are compressible and moves randomly in a straight line. Liquids and solids do not fill up containers. Liquids although have weak forces but they are better attracted than gases. Solids have fixed and definite volume.So, option A is the perfect answer.
A volume is measured experimentally as
4.09 mL. What is the percent error, given
that the correct value is 4.13 mL?
Answer in units of %.
Answer:
The answer is 0.97 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual volume = 4.13 mL
error = 4.13 - 4.09 = 0.04
We have
[tex]p(\%) = \frac{0.04}{4.13} \times 100 \\ = 0.968523002...[/tex]
We have the final answer as
0.97 %Hope this helps you
how many grams of potassium nitrate are required to prepare 3.00 x 10^2 mL of 0.750 M solution
Answer:
Mass = 22.725 g
Explanation:
Given data:
Mass of potassium nitrate required = ?
Volume of solution = 3.00 ×10² mL
Molarity of solution = 0.750 M
Solution:
Formula:
Molarity = number of moles of solute / L of solution
Now we will convert the volume into L.
3.00 ×10² mL × 1L /1000 mL
0.003 ×10² L or 0.3 L
now we will put the values in formula.
0.750 M = n / 0.3 L
n = 0.750 M × 0.3 L
M = mol/L
n = 0.225 mol
Mass of potassium nitrate:
Mass = number of moles × molar mass
Mass = 0.225 mol × 101 g/mol
Mass = 22.725 g
Decreasing the volume of a gas increases the pressure of the gas. .
Answer:
False.
Explanation:
If the gas is leaving it cannot have higher pressure.
One day, you ride your bike to a local bookstore. You purchase a few of your favorite comic books, put them in your backpack, and ride home. Once you get home, you sit in a rocking chair and read your comic books. Which resource in this scenario is nonrenewable?
O the steel frame used to make the bike.
O the paper used to make the comic books.
O the cotton used to make the backpack.
O the wood used to make the rocking chair.
A non-renewable also know as a finite resources are those resources whose availability is limited and can diminish is not used in a proper manner.
Eg:- fossil fuels, crude oil/petroleum, natural gas, and nuclear fuels.
Explanation:
Renewable resources are those resources that can be repeatedly used and cannot run out of stock as they are naturally replaceable.
Eg:-Wood,Paper,Cotton
Among the options mentioned in the above question steel is not a renewable resource. Steel is made up of iron ,which is mined from the ground.
Brainliest?
The statement is "the steel frame used to make the bike."
What is non-renewable resourceA non-renewable resource is one that cannot be replenished by natural processes at a rate fast enough to keep up with use. Carbon-based fossil fuels are an example.
Metals are essential and valuable resources in general. Metals are extremely recyclable and reusable, despite the fact that their natural supply or the supply of components used to make diverse alloys are set.
Steel is created from iron, a nonrenewable resource.
Hence the correct option is A.
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Which rule or principle does this violate?
A. Aufbau Principle
B. Pauli Exclusion Principle
C. Hunds rule
Answer:
Hunds rule is violated here.
Hunds rule : pairing of electrons takes place only if all the orbitals are filled with single electrons each.
What happens to an atom if it loses an electron?
Answer:
When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons. In the opposite case when an atom gains electron(s) it becomes negatively charged (more electrons than protons).
Explanation:
The outer most energy level of the electron cloud is referred to as the Valence Shell.
O True
O False
Lewis Dot structure for N2?
PHOTO ABOVE
Is not D I got it wrong
Answer: C
Explanation:
The N2 should have a triple bond because it needs three covalent bonds to fill its outer shell. This means the two atoms need to share three electrons each.
It also serves as a nice illustration of a triple-bonded molecule. For the Lewis structure of N2, there are ten accessible valence electrons. Therefore, option C is correct.
What is lewis structure ?The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
It contradicts the octet rule, as shown by the production of molecules, and could not account for the release of energy during the formation of covalent bonds.
The three parallel lines between the N atoms represent three bonds. This is a triple bond, with one electron from each N atom contributing to each bond. A total of 6 electrons are thus represented by this triple bond.
Thus, option C is correct.
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Which of the following is the correct Lewis Dot Structure for N2?
PHOTO ABOVE
please help I got it wrong so is not D
The correct Lewis Dot Structure for Nitrogen is structure C. Therefore, option C is correct.
What is lewis dot structure ?The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms.
Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures add lines between atoms to represent shared pairs in a chemical bond, extending the idea of the electron dot diagram.
In Nitrogen molecule, every nitrogen atom has five valence electrons and there is a triple bond between the two nitrogen atoms. Thus, the correct lewis dot structure is; :N⋮⋮N: .
Thus, option C is correct.
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The characteristics of two unknown intermolecular attractions, A and B, are compared in the table.
Intermolecular Attractions
A B
Occurs between non-polar diatomic molecules Occurs between polar molecules with either an N, O or F attached to an H atom
Which of the following conclusions about the two attractions is correct? (1 point)
A represents London dispersion forces, and B represents hydrogen bonding.
A represents ion-dipole interactions, and B represents hydrogen bonding.
A represents London dispersion forces, and B represents ion-dipole interactions.
A represents dipole-dipole interactions, and B represents ion-dipole interactions.
Answer:
A represents London dispersion forces, and B represents hydrogen bonding.
Explanation:
The Intermolecular force between two non polar molecules will be weaker London-dispersion forces. The bond between a hydrogen containing molecule with another molecule of an electronegative atom such as O, N etc. is hydrogen bond.
What is intermolecular forces?Intermolecular forces are forces between two molecules that bind them together. The force of attraction is generated by sharing of electrons or by donation of electrons.
Non-polar molecules are those with no charge separation. But when two non-polar molecules comes in contact a temporary dipole will create there and they attract each by the opposite charge ends. This type of force is called London dispersion force.
One molecule with a hydrogen atom is able to form a hydrogen bond with an electronegative atom of another molecule due to the electronegativity difference between hydrogen atom and atoms like N, O, F etc.
Therefore, the intermolecular force A is London-dispersion force and B is hydrogen bonding. Hence, option A is correct.
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In 1897, Joseph Thomson discovered that atoms contained electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson's discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?
Answer:
because it is a theory
Explanation:
The best explanation for why scientific theories are modified is simply because it is a theory. Theories are created as a set of suppositions that help humanity understand something that would otherwise be unexplainable. Since they are not proven through scientific facts but instead are more of ideas that help further our understanding of a phenomenon, they tend to be modified as new ideas are introduced and others are proven to be false/wrong.
is it possible to have a negative ion in a hydrogen atom in real life? Explain.
Answer:
Yes
Explanation:
Abstract. The negative ion of hydrogen continues to be important in atomic physics and astrophysics. Correlations between the two electrons are strong alieady in the ground state, the only bound state in this three-body system.
Find the average atomic mass of Boron.
Boron comes in two isotopes, Boron-10 and Boron-11. Boron-10 has an exact mass of 10.01294 and has a percent abundance of 19.83%. Boron-11 has an exact mass of 11.00931 and a percent abundance of 80.17%.
Answer:
12
Explanation:
Answer:
11.01
Explanation:
just did the assignment :D
pls help asap !! unsure how to do this
Recall all the models you described in task 1. Think about the results each model would predict for Rutherford's experiment. Which atomic models does Rutherford's experimental evidence support? Explain why these models are compatible with the experimental results.
The question is incomplete; the complete question is:
Recall all the atomic models you described in task 1. think about the results...
Recall all the atomic models you described in task 1. think about the results each model would predict for rutherford’s gold foil experiment. which atomic models does rutherford’s experimental evidence support? explain why these models are compatible with the experimental results.
the models in task 1 were dalton's, thomson's, rutherford's, and bohr's.
Answer:
Bohr's
Explanation:
Rutherford's theory laid the foundation upon which Bohr's model is founded. Rutherford established the fact that at the center of the atom, there is a nucleus whose radius is smaller than the radius of the atom. This nucleus is positively charged and most of the mass of the atom is concentrated there. Electrons move round this nucleus in orbits.
The experimental evidences of the Bohr's model shows that Rutherford's model was fundamentally correct. However, Bohr's model introduced the idea of quantization of the energy of electrons in an atom. The model went further to explain the spectra lines of the hydrogen atom.
where might u find examples of series & parallel circuits in everyday life
Answer: Here are some examples!
Explanation: An example of a series circuit is a string of Christmas lights. If any one of the bulbs is missing or burned out, no current will flow and none of the lights will go on. Parallel circuits are like the smaller blood vessels that branch off from an artery and then connect to a vein to return blood to the heart.
anywhere inside ur house lma.o.
Where dose the energy that powers the water cycle come from?
Answer:
sun is the energy that powers the water cycle from
Which of the following is not a genetic trait?
Dimples
Hair length
Height
Hair Color
Answer:
I honestly think is hair length
sketch a heating curve for water at 101kPa
using the information from the phase diagram. Label the melting point and
boiling point temperatures on your heating curve
Answer:
Please find attached a sketch of the heating curve of water at atmospheric pressure ( approximately 101 kPa) as traced from an online source
Explanation:
Given that the pressure at 101 kPa is approximately 1 atmosphere, we have;
The melting point and the boiling point occurs at approximately 0°C and approximately 100°C, respectively;
The melting point and the boiling point experience latent heat, therefore that temperature remains the same, though heat is continuously added
Also, given that the latent heat of vaporization (22.6 × 10⁵ J/kg) is approximately 7 times the latent heat of fusion is (3.33 × 10⁵ J/kg), the length of the plateau representing evaporation would be approximately 7 times longer than the length representing fusion.
The heating curve obtained from an online source for water at atmospheric pressure, is presented in the attached sketch.
Predict the effect of a mutation which limits the production of pigment in hair
Answer:
E
Explanation:
Predict the effect of a mutation which limits the production of pigment in hair
The animal would have white hair or hair with no color.
The animal would have light brown hair.
The animal would have black hair.
The animal would have no hair at all.
The animal would have white hair or hair with no color is the effect of a mutation which limits the production of pigment in hair.
Mutation is the change in the genetic composition of the gene or genetic material which alters the normal functioning of the gene or the genetic material. In the given situation if the mutation occurs at the gene which is responsible for the production of protein pigment responsible for imparting color to the hair. Then it is expected that the gene does not encode for a protein pigment as a result the hair will remain without color or white.Hence, the animal would have white hair or hair with no color is the correct option.
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how many of protien consumed by humans around the world is fish?
a) 5 percent
b)20percent
c)4p percent
d)50 percent
The answer would be 20% (B)
Which group has the highest ionization energies? Explain why.
Answer:
nobel elements (gr. 18) because they are fully stable due to octet complete--------------------------------------------------
Which process is represented by this diagram?
Answer:distillation
Explanation:
The process represented by the diagram is chromatography.
What is chromatography?
Chromatography is a separation technique used to separate components present in a mixture.It makes use of two phases the stationary phase and mobile phase .
Stationary phase is a phase in which the mixture components to be separated is loaded. Mobile phase is a phase which is run over the stationary phase so as to enables components of mixtures to separate.
Separation of components is based on the principle that components of mixture which are soluble in mobile phase travel large distances over stationary phase while those which are insoluble or less soluble travel less distances over stationary phase.
For every component which is separated, a Rf value can be calculated which is simply ratio distance traveled by solute divided by distance traveled by solvent front.
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Manny designs an experiment to learn about erosion. First, he sets up three long trays with equal-sized piles of sand at one of each tray. Then he sets up Tray A so that it lays flat on a table. He elevates the end of Tray B that holds the sand by 5 cm. Next, he elevates the end of Tray C that holds the sand in each tray. Finally, he observes and measures how far sand is carried by the way water poured into each tray.
Answer:
Height of tray
Explanation:
Convert 20 cals to J
Answer: 83.68 J
Explanation:
1 cal=4.184 J
1×20=4.184×20
20cals=83.68 J
it is difficult to press the football in water why?
Answer:
The ball you want to submerge displaces the water occupied in the ball's volume. ... In water the concrete has a buoyancy pressure force equal to the displaced liquid's weight and weighs only 120 pounds until it reaches the surface.
Explanation:
A particle that orbits the nucleus in an atom is called a(n)
electron
proton
neutron