INFORMATION:
We have the next options:
A) Oxidation is the non-spontaneous loss of electrons
B) Oxidation is the spontaneous loss of electrons
C) Oxidation is the gain of electrons
D) Oxidation is the loss of electrons
And we must select the one that best describes an oxidation process
STEP BY STEP EXPLANATION:
Oxidation process consists in the loss of electrons during a reaction.
An older meaning of oxidation was when oxygen was added to a compound. This was because oxygen gas (O2) was the first known oxidizing agent. While the addition of oxygen to a compound typically meets the criteria of electron loss and an increase in the oxidation state, the definition of oxidation was expanded to include other types of chemical reactions.
Finally, knowing that, we can state that, in general, Oxidation is the loss of electrons.
ANSWER:
D) Oxidation is the loss of electrons
A student proposed the Bohr model below for sodium (Na). Is this student’s model correct? Justify your answer
The Bohr model is a representation of the electronic configuration of the atom. According to this model, each energy level can hold a certain number of electrons. In the first energy there can only be 2 electrons, in the second and the following energy levels there can be a maximum of 8 electrons.
Sodium, Na which has 11 electrons in total so in the first level it will have two electrons, in the second level it will have 8 electrons and in the third level it will have the missing electron.
In the model proposed by the student, the electrons are represented in blue. The model proposed by the student is incorrect.
We see that in the second energy level he drew 9 electrons, this is incorrect since from the second energy level there can only be 8 electrons, the remaining electron must be located in the third energy level.
Where would one find the s-block, p-block, d-block and f-block elements on the periodic table?
Answer:
You can find p-block elements on the periodic table in groups 13 to 18, you can find the s-block on the periodic table in group 1, Group 3 through Group 12 are d-block elements, and The f-block elements, found in the two rows at the bottom of the periodic table, are called inner transition metals and have valence electrons in the f-orbital's.
Explanation:
Hope this helps!
Which formulas represent one ionic compound and one covalent compound?
a. N, and SO.
b. Cl, and H,S
c. BaCl and N.O,
d. Na,O and CaO
The formula NaO,CaO represents one ionic compound and one covalent compound.
An ionic compound is formed by ions made up of charged particles.A covalent compound is formed by sharing of electrons between two different elements.N exists as N2 which is covalently bonded and SO exists as S=O which is covalently bonded.Cl exists as Cl2 which is formed by sharing of electrons and is covalently bonded.HS has an electronegativity difference of 0.4 which is non-polar covalent compound.BaCl2 exists as an ionic compound as it is formed on basis of electrostatic attraction.NO exists as N=O which is a covalent compound.NaO exists as ionic compound and CaO exists as covalent compound.
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How can she test this idea in the Flowing Water Model?
She test this idea in the Flowing Water Model through integrated water flow model
Flowing water model is the computer programmed for simulating water flow through the integrated land surface water and groundwater flow systems and hydroelectric energy is power made by the moving water and water always flow downhills because of gravity and she She test this idea in the Flowing Water Model through integrated water flow model
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The equation below shows hydrogen reacting with oxygen to produce water.
2H2 + O2 Right arrow. 2H2O
If 16 mol of oxygen were reacted with excess hydrogen gas, how many moles of water would be produced?
4.0 mol
8.0 mol
16 mol
32 mol
The equation below shows hydrogen reacting with oxygen to produce water 2H₂ + O₂ → 2H₂O If 16 mole of oxygen were reacted with excess hydrogen gas, then 32 mole of water would be produced
Mole is the amount of substance of a system which contains as many elementary entities
Here given data is
Hydrogen reacting with oxygen to produce water and the reaction is
2H₂ + O₂ → 2H₂O
16 mol of oxygen were reacted with excess hydrogen gas
Then we have to calculate moles of water would be produced = ?
Moles of oxygen = 16 moles
From the balanced equation
1 mole oxygen react to give 2 moles of water
16 moles oxygen react to give 2×16 = 32 moles
Therefore 32 moles of water would be produced in the reaction
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d. 32 mol in case you dont want to read that
Which statement about liquids and gases is correct? A -1 cm³ of gas contains more particles than 1 cm² of liquid.
B- A given mass of liquid has a fixed volume at room temperature.
C- Particles in a liquid can easily be forced closer together.
D Particles in a liquid have fixed positions.
Answer:
A given mass of liquid has a fixed volume at room temperature.
Explanation:
Which of the following units is used when measuring electrical power?
Answer:
Joules/sec and watts.
Explanation:
1 Joule/sec is a rate of energy expending every second. It is equal to a watt, the English term.
What is the empirical formula of a compound composed of 81. 71% c and 18. 29% h by mass?.
Some are based on other
languages, for example the
symbol
is
from the Latin "ferrium."
Answer:
Fe
Iron – Ferrum (Fe)
Iron's Latin name, 'ferrum', gives it its symbol Fe; it simply means 'iron' or 'sword', and is possibly of Semitic origin.
what is the molarity of chloride ion in a solution made by dissolving 1.500g of aluminum chloride in a total volume of 250.0ml?
Answer: The Molarity of chloride ion in the solution is 0.1344 m.
Explanation:
For this question we first have to find the no. of moles of the given compound.
moles of Aluminium chloride is (n)= 1.5/133.5=0.0112. (given mass/molecular mass)
no of chloride ions present in 1 mole of this given compound = 3
moles of chloride ions present in 0.0112 moles of compound = 0.0112x3=0.0336
molarity of CL ion is = 0.0336/(250/1000)=0.1334 m
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How many grams of sodium hydroxide (NaOH) do you need to make 6.5 L of 1.0M solution?
260grams
Explanations:The formula for calculating the moles of NaOH is expressed as
[tex]\begin{gathered} moles=molarity\times volume \\ moles\text{ of NaOH}=1.0M\times6.5L \\ moles\text{ of NaOH}=6.5moles \end{gathered}[/tex]Determine the required mass of NaOH
[tex]\begin{gathered} Mass\text{ of NaOH}=moles\times molar\text{ mass} \\ Mass\text{ of NaOH}=6.5\cancel{moles}\times\frac{40g}{\cancel{mole}} \\ Mass\text{ of NaOH}=260grams \end{gathered}[/tex]Hence the grams of sodium hydroxide (NaOH) you need to make 6.5 L of 1.0M solution is 260grams
what is the molarity of the solution if the mole fraction of ethanol in water is 0.2 ?
Answer: 2.1M
Explanation:
Hence, the molarity of a solution of ethanol in water is 2.1M.
What is the compound name of this formula CuSO4 ?
Copper(II) sulfate.
Explanations:Before we name the given compound, we need to know what chemical compounds are. Chemical compounds are chemical substances composed of molecules formed from atoms of an element and held together by a chemical bond.
Given the chemical compound CuSO4, this compound contains copper, sulfur, and oxygen element.
The molecular compound CuSO4 is named with the first element first and then the second element by using the stem of the element name plus the suffix -ate
The compound name for CuSo4 will therefore be Copper(II) sulfate. The roman numeral of (II) comes from the sum of the oxidation state of the element.
Note that the oxygen atoms have a -2 oxidation number, and sulfur has a +6, oxidation number to have (4 * -2) + 6 = -2. This makes copper have an oxidation number of +2.
Which of the following describes how difficult it is to remove a valence electron from an atom of a particular element?
A: Electron Affinity
B: Ionization energy
C: Atomic Radius
D: Electronegativity
Answer:
B: ionization energy
Explanation:
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Answer: A. The population is growing rapidly
What type of nuclear radiation is given off in the nuclear reaction below?
35/16S→35/17Cl
Answer:
Beta radiation
Explanation:
we know the three types of nuclear radiation:
alpha beta gammaokay so first look at the mass number of both the product and reactant, we notice that the mass number for both remains 35.
immediately we can cross of the possibility of it being alpha radiation because an alpha particle is similar to that of helium nucleus, hence if it was alpha, the mass number of Cl would be 4 less.
now look at the atomic number, we notice that moving from S to Cl it increased by 1 which can only mean it was beta radiation.
Beta radiation is when a neutron inside to nucleus turns into a proton and an electron, the electron is ejected from the nucleus hence it's a high speed electron.
neutron --> proton + electron
the reason the mass number is the same is because a neutron and proton has a mass of 1 whilst the electron is too small to cause much change.
the reason for nuclear decay is mainly because the elements want to achieve more stability.
what is the total number of electron-pair domains (electron clouds) around the central atom in the sulfur tetrafluoride molecule? enter your answer as a numeral without leading or lagging spaces. g
Total number of electron-pair domains (electron clouds) around the central atom in the sulfurtetrafluoride molecule is five. which includes 4 bond pair 1 loan pair.
what is electron pair domain?An atom's electron domain is the number of lone pairs or chemical bond locations that surround it. It represents the number of locations expected to contain electrons. By knowing the electron domain of each atom in a molecule, you can predict its geometry.
“The electron geometry describes the spatial arrangement of a molecule’s bonds and lone pairs. VSEPR theory can be used to calculate electron geometry.”
The term electron geometry is the name of the electron pair/groups/domains on the central atom, whether they are bonding electrons or non-bonding electrons. Electron pairs are electrons that exist in pairs or bonds, as lone pairs or as a single unpaired electron. Because electrons are always in motion and their paths cannot be precisely defined, the electron arrangement in a molecule is described in terms of an electron density distribution.
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State the worded equation for the reaction that occurred in a beaker when copper is placed in a beaker of silver nitrate.
The reaction of silver nitrate with copper is a substitution reaction. We have copper in its free state, Cu, and we have silver nitrate which has the formula AgNO3. The copper replaces the silver obtaining the following reaction:
[tex]2AgNO_{3(aq)}+Cu_{(s)}\rightarrow Cu(NO_3)_{2(aq)}+2Ag_{(s)}[/tex]The products obtained are copper nitrate and silver.
The word equation will be:
[tex]SilverNitrate+Copper\rightarrow Copper(II)Nitrate+Silver[/tex]Which of the following is true of
the eye of a hurricane?
A. Warm, moist bands of air move around the
eye.
B. The eye makes up the outer most layer of the
storm.
C. Hot and humid air rises up through the eye.
D. It only appears at the very beginning and very
end of the storm.
Answer: a
Explanation:
Please answeeeerrr i neeed help look at imagine
Answer: D
Explanation:
What is the most stable form of Calcium in terms of nuclear stability?
Answer
Calcium - 40 is the most stable and most likely to be found occurring naturally
Explanation
Nuclear stability means that the nucleus of the element is stable enough to not decay with the passing of time, this decay is known as radioactivity. When it comes to Calcium, we have many isotopes of this element, but only a few have such a long half-life that we can consider them to be stable, and Calcium - 40 is the most stable and common of them.
What is the molecular formula of the compound?Express your answer as a chemical formula.
Answer:
[tex]C_2H_4[/tex]Explanation:
Here, we want to get the chemical formula for the compound
From what we have, the compound contains hydrogen and carbon only
We also were given that the molar mass is 28.06 amu
Now,we beed to get the individual atomic mass of carbon and hydrogen
From records, carbon has an AMU of 12.01
The AMU of hydrogen is 1.00794
Looking at the total value, we can see that the max possible number of atoms of carbon present is 2
Now, we need to know the number of hydrogen atoms
Let us call this n
Mathematically, we know that the AMU of the compound is the sum of the AMU of the individual atoms
Hence, we have it that:
[tex]\begin{gathered} 28.06\text{ = 2(12.01) + n(1.00794)} \\ 1.00794n\text{ = 28.06 - 24.02} \\ 1.00794n\text{ = 4.04} \\ \\ n\text{ = }\frac{4.04}{1.00794} \\ \\ n\text{ = 4} \end{gathered}[/tex]Finally, we want to write the molecular formula of the compound
The molecular formula is written with carbon first, followed by its number of atoms as subscript, then hydrogen , with its number of atoms as subscript
We have this written as:
[tex]C_2H_4[/tex]Explain in terms of energy transfer and motion of molecules what happens to the WAX when the candle is blown out.A: When the candle was blown out the wax ________ because the molecules _________ energy and moved _________.
When a candle is lit, a combustion reaction takes place that releases heat, this heat causes the temperature of the candle to increase and the state of the candle to be liquid. Molecules move due to heat.
When the candle blown out, the temperature begins to decrease and the liquid wax begins to solidify because the molecules move slower and slower. Therefore, the spaces of the obtained can be filled in the following way:
When the candle was blown out the wax solidifies because the molecules have low energy and moved slower.
3. Categorize the following physical properties as physical properties recognized by our sense organs or measurable physical properties a. Density b. odor c. taste d. melting point e. color f. conductivity
Melting point, density, color, are measurable physical properties.
A physical property is a characteristic that may be observed or quantified without changing the composition. Density is another illustration of a physical characteristic. Your coin is still composed of the same material as it was before it was dropped into the fountain, despite the fact that it may be a little moist. Additional examples of physical attributes are color, mass, smell, boiling point, volume, and temperature.
Some physical qualities, such density and color, may be detected without changing the physical state of the item being studied. Only when matter undergoes a physical transition can other physical properties, like the melting point of iron or the freezing point of water, be seen.
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3.Which of the following isotopes should be expected to be radioactive?Select one:a. Ab. Bc. Cd. D
Explanation:
To find the isotope that is expected to be radioactive we have to compare the given isotopes with the ones that we find the in the periodic table.
(A) Ti:
Isotope ----> atomic mass = 48 atomic number = 22
Periodic table ---> average atomic mass = 47.9 atomic number = 22
(B) Sr:
Isotope ----> atomic mass = 88 atomic number = 38
Periodic table ---> average atomic mass = 87.6 atomic number = 38
(C) Os:
Isotope ----> atomic mass = 192 atomic number = 76
Periodic table ---> average atomic mass = 190.2 atomic number = 76
(D) Pu:
Isotope ----> atomic mass = 244 atomic number = 94
Periodic table ---> average atomic mass = 244 atomic number = 94
If we take a look at them we will see that the only one that is different is osmium. The atomic mass of the isotope is 192 amu, that means that this isotope has 2 more neutrons than the average atom of the element. So we can expect that it could be radioactive.
Answer: C. Os
i need help on all of them please & thank you!! Unfortunately Punnett Squares are not always for finding out the best parts about parenting. They are often, as you will see in the next few lessons, often used to determine the probability of a disease being passed on to a child. We’ll have you try one and see what that looks like. One such disease is Cystic Fibrosis. Let’s assume both parents are heterozygous for Cystic Fibrosis. That means both parents carry the recessive gene for the disease, but because of the dominant genes they have, they don’t have it. However, they want to know if they try to have a child, what the chances of the child would be for having Cystic Fibrosis?
Answer:
question 1:
answered previously
question 2:
a= 50% chance tall daughter
b= 50% chance short daughter
question 3:
a= 75% chance of not having cystic fibrosis
b= 25% chance of having cystic fibrosis
question 3:
Explanation:
question 2:
the question specified on the offspring being female so when stating the gametes we must include the XX chromosomes for the female and XY chromosome for the male.
let us denote that:
T = tall gene
t = short gene
Father 》 Mother
parental phenotype: Short 》 tall
parental genotype: XtYt 》 XTXt
parental gametes: (Xt) (Yt) 》 (XT) (Xt)
random fertilization:
Xt Yt
XT XTXt XTYt
Xt XtXt XtYt
F1 generation sex: Male 》Female
F1 chromosomes: XY 》 XX
F1 gen phenotype: Tall 》 Tall
F1 gen genotype: Tt, tt 》 Tt, tt
ratio: 2 : 2 or 1 : 1
percentage gender: 50% 》 50%
percentage tall: 50% 》 50%
question 3:
denoting:
N = normal (dominant)
c= cystic fibrosis (recessive)
parental phenotype: Normal 》Normal
parental genotype: Nc 》 Nc
random fertilization:
N c
N NN Nc
c Nc cc
F1 gen phenotype: Normal 》 Cystic fibrosis
F1 gen genotype: NN, Nc, Nc 》 cc
ratio: 3 : 1
percentage: 75% 》 25%
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What do understanding isotopes explain on the periodic table 
Describe the intermolecular forces in terms of strength and properties?
Liquids have characteristics that fall somewhere in between those of solids and gases, yet they resemble solids more. Intermolecular forces, as opposed to intramolecular forces, such as the covalent bonds that bind atoms in molecules and polyatomic ions, keep molecules in a liquid or solid together. In comparison to covalent bonds, intermolecular forces are often significantly weaker. For instance, in 1 mol of water, the intramolecular forces must be overcome in order to break both O-H bonds, while the intermolecular forces must be overcome in order to turn 1 mol of liquid water into water vapor at 100 °C, which needs just around 41 kJ. (Despite this figure appearing to be modest, the intermolecular forces in liquid water are some of the highest intermolecular forces ever measured.
calculate how many grams are in 0.10 moles of OH ions
1.7 grams are there in 0.10 moles of OH ions.
The mole is a unit of measurement or the starting point for determining the concentration of a chemical in a sample. Avogadro's constant, or 1 mole, is a quantity that is equal to 6.022 × 10²³ particles. Any species, such as atoms, molecules, electrons, protons, neutrons, etc., can make up.
Number of moles = Mass/ Molecular mass
Given, number of moles = 0.10
Molecular mass of OH = 17 g/mol
∴ Mass = Number of moles × Molecular mass
Mass = 0.10 × 17
Mass = 1.7 grams
Therefore, 1.7 grams are there in 0.10 moles of OH ions.
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In these given options, flooding is most likely to reduced human population.
Humans are affected by floods in a variety of ways, including: flooding can cause injury or death to individuals. Sewage is frequently present in floodwater, which can compromise clean drinking water and cause disease. Power supply may become unstable.Environmental stress is a term that refers to a variety of circumstances, such as food shortages, predator activity, and other density-dependent variables, that cause population growth to slow down.Therefore, the infrastructure in our environment and the ecosystem itself may be harmed by severe flooding. They can first demolish houses and render them inhabitable. Additionally, they can clear farms of sand, which makes it harder to cultivate crops. In addition to the aforementioned, flooding taints clean water, resulting in illnesses.
Limiting variables prevent populations from growing either through increased death rates or emigration, decreased birthrates or immigration, or a combination of these factors.
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