what is the electron configuration for the valence electrons in chlorine? do not include the core electrons in the configuration. provide your answer below:
Answers
Answer:The electron configuration for the valence electrons in chlorine is 3s^2 3p^5.
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In 1-2 complete sentences, identify the black lines and explain what they represent
Answers
Answer: They are magnetic lines and these lines depict the invisible magnetic field around the magnet! Hope this helps I got it right on my quiz :)
Explanation:
if you start with 55 grams of sodium flouride naf how many grams of magnesium fluride mgf2 will be produced
Answers
Answer:
Mass of MgF₂ formed = 40.5 g
Explanation:
Given data:
Mass of NaF = 55 g
Mass of MgF₂ formed = ?
Solution:
Chemical equation:
2NaF + Mg → MgF₂ + 2Na
Number of moles of NaF:
Number of moles = mass/molar mass
Number of moles = 55 g / 41.98 g/mol
Number of moles = 1.3 mol
now we will compare the moles of sodium fluoride with magnesium fluoride.
NaF : MgF₂
2 : 1
1.3 : 1/2×1.3 = 0.65 mol
Mass of magnesium fluoride:
Mass = number of moles × molar mass
Mass = 0.65 mol × 62.3 g/mol
Mass = 40.5 g
According to the following reaction, how many grams of oxygen gas are required for the complete reaction of 25.1 grams of carbon monoxide? CO+0.5O2→CO2
Answers
In order to calculate the amount of oxygen gas required for the complete reaction of 25.1 grams of carbon monoxide, the mole ratio of the two elements must be determined.
Here, correct answer will be
According to the equation, the mole ratio of carbon monoxide to oxygen is 1:0.5, meaning that for every 1 mole of carbon monoxide, 0.5 moles of oxygen gas is required.
Thus, if 25.1 grams of carbon monoxide is used, 12.55 grams of oxygen gas is required to completely react with it. This is because 12.55 grams of oxygen gas is the equivalent of 0.5 moles of oxygen gas, and 0.5 moles of oxygen gas is the exact amount of oxygen gas that is needed to react with 1 mole of carbon monoxide.
Therefore, in order for the complete reaction of 25.1 grams of carbon monoxide, 12.55 grams of oxygen gas is needed.
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Dad, care of the child in the swing a forward push in order to set her into motion in this situation work is done on the child by the?
Answers
There is no kinetic energy in the ball at first, only gravitational potential energy mgh. Because some energy must always be expended to overcome air resistance and resistance in the support as ball swings.
The term "motion" refers to what?Motion is a characteristic where a body shifts its location with regard to time. These are the different motions: 2.1 a linear motion Particles moving linearly can be characterized as traveling along a straight or curved path from one location to another.
What are movement and an example?A change in an object's position with regard to time is what we mean when we say that something is moving. Motion is demonstrated by things moving, such is a book tumbling off a desk, water running from the faucet, rattling windows, etc.
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what happens when there is more kinetic energy?
Answers
Energy that a moving object has due to its motion is Kinetic Energy. Kinetic Energy: ... The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Answer:
when there is more kinetic energy the objects moves fast...
What information is obtained from radioactive dating?
- How old something was when it died
- The damage done to an object from radiation
- The age of an object that was once living (ANSWER)
- The lifetime of an isotope in a particular object
Answers
Answer:
C
Explanation:
The age of an object that was once living. Hence, option C is correct.
What is radioactive dating?Radioactive dating can be defined as a strategy to date the age of fossils by means of radioactive isotopes.
These methodologies (Radioactive dating) are fundamental for the application field of geologists and palaeontologists.
In conclusion, Radioactive dating refers to the techniques used to date the age of rocks and fossils by radioactive isotopes.
Information related to the age of an object that was once living is obtained from radioactive dating.
Hence, option C is correct.
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24. Determine the molecular formula of
a compound that is 25.9% N and
74.1% O and has a mass of 216
g/mol.
Answers
The molecular formula of a compound that is 25.9% N and 74.1% O and has a mass of 216 g/mol is Nitrogen(5) Oxygen (10).
How to determine the molecular formulaTo determine the molecular formula of this compound, we can begin by converting the percentages to grams and changing them to moles as follows:
Nitrogen = 25.9 g
Oxygen = 74.1 g
Converting to moles:
25.9/14 = 1.85 moles
74.1/16 = 4.43 moles
Now we divide by the smallest number to get
1.85/1.85 = 1
4.43/1.85 = 2.4
So, the empirical formula = NO2
The molecular formula will be
The molar mass of an empirical formula
= 1 × 14.0067 + 2 × 16
= 14.0067 + 32
= 46.0067 or 46
Now we divide mass by molar mass as follows:
216/46 = 4.69 or 5
When we multiply the subscripts by 5, we will have Nitrogen(5) Oxygen (10). This is the molecular formula.
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what are salt properties of matter?
Answers
Answer: Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Answer:
Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Explanation:
give the first answer brainliest, im just fixing thier spelling
he nucleus of an atom is small compared to the size of the atom. why is this consistent with rutherford's nuclear theory? the nucleus of an atom is small compared to the size of the atom. why is this consistent with rutherford's nuclear theory? rutherford's nuclear theory states that most of the mass of an atom and all of its electrons are contained in a small core called the nucleus. rutherford's nuclear theory states that the nucleus of an atom is small compared to the size of the atom, and, therefore, the nucleus has a relatively low mass compared to the mass of an atom. rutherford's nuclear theory states that the nucleus is small but contains about half of the mass of an atom. rutherford's nuclear theory states that most of the mass of an atom and all of its positive charge are contained in a small core called the nucleus. request answer
Answers
The nucleus of an atom is small compared to the size of the atom because of Rutherford's nuclear theory. Rutherford's nuclear theory states that most of the mass of an atom and all of its positive charge are contained in a small core called the nucleus.
This statement is consistent with the fact that the nucleus of an atom is small compared to the size of the atom. Rutherford's nuclear theory states that the nucleus of an atom is small compared to the size of the atom, and, therefore, the nucleus has a relatively low mass compared to the mass of an atom.
Rutherford's nuclear theory states that the nucleus is small but contains about half of the mass of an atom. The nuclear theory was discovered by Ernest Rutherford in 1911.
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89. What is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C?
Answers
0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.
What is an ideal gas equation?The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.
According to Ideal Gas Equation,
PV = nRT
Therefore, P ∝ T
P₁T₂ = P₂T₁
Given :
P₁ = ?
P₂ = 1.11 atm
T₁ = 30.0 C
T₂ = 15 C
Solving :
P₁ x 30 = 1.11 x 15
P₂ = 0.555 atm
Hence, 0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.
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Identify the elements that have the following electron configurations:
1s²2s²2p⁶3s²3p¹ *
Answers
You were asked to notice that the rim of the porcelain evaporating dish is unglazed, and observe what water will do to the unglazed side of the piece of terra cotta plant pot on your tray. This is why we preheated the evaporating dish prior to measuring the evaporating dishes initial mass. Brian suggests to Matt that if the evaporating dish was not preheated, the mass of the anhydrate will be heavier resulting in a greater value for the anhydrate, and a smaller value for "z" in this formula, CuxCly • zH2O. Do you agree or disagree? Justify your answer
Answers
Yes, I am agree with the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula:
CuxCly • zH2O
An anhydrate is a chemical compound that does not contain any water molecules. An anhydrate is formed when the water molecules present in a hydrate are removed through heating or another process. When we heat a hydrated compound, it results in the loss of water molecules from the compound, leading to the formation of an anhydrate.The anhydrate's mass is measured by calculating the difference in weight of the evaporating dish containing the hydrated sample and the weight of the empty evaporating dish. When we use an unpreheated evaporating dish, it results in the loss of weight as the water molecules are released from the hydrated compound. The water molecules released from the sample will condense on the cooler surface of the evaporating dish, which will lead to a higher weight than the actual weight of the anhydrate. Therefore, if the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula, CuxCly • zH2O.For such more questions on anhydrate
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Estimate the volume of a helium-filled balloon at STP if it is to lift a payload of 500 kg. The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3.
Answers
The volume of the helium-filled balloon at STP needed to lift a payload of 500 kg is approximately 431 \(m^{3}\).
To estimate the volume of a helium-filled balloon at STP that can lift a payload of 500 kg, we'll need to consider the densities of both air and helium.
1: Calculate the mass of displaced air.
Since the balloon will displace an equal mass of air, we can set up the equation:
Mass of air displaced = Mass of helium in the balloon + Mass of payload
2: Find the difference in mass between air and helium.
Density = Mass/Volume, so
Mass = Density * Volume.
Since we want to find the volume of the helium-filled balloon, we can rearrange the equation to:
Volume = Mass/Density
3: Calculate the volume of air displaced.
Mass of air displaced = (500 kg) * (1.29 kg/\(m^{3}\) - 0.178 kg/\(m^{3}\))
Mass of air displaced = 500 kg * 1.112 kg/\(m^{3}\)
Mass of air displaced = 556 kg
4: Calculate the volume of the helium-filled balloon.
Volume = Mass of air displaced / Density of air
Volume = 556 kg / 1.29 kg/\(m^{3}\)
Volume ≈ 431 \(m^{3}\)
Therefore, the volume is 431 \(m^{3}\)
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I got told if i got a lighter lit it and put it on my self that i should eat a cookie an watch :D should i do it :3
Answers
What are some skills many CTSOs help their members develop? Select two options.
Answers
CTSO is an extracurricular program for students. The program helps the students build leadership qualities and career-specific skills.
What is CTSO?A career and technical student organization is a program designed and implemented for the students to improve their interpersonal relationships, goal setting, and build leadership skills.
CTSO helps in building the skills required for professional career establishment and for the educational purposes that are other than academics. It includes competitions, plays, sports events, etc.
Therefore, CTSO increases leadership skills and provides career-specific skills.
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Answer
the answer to your question is leadership and career-specific skills hope this helps ;)
Explanation:
One of the most popular club drugs. Originally patented as an appetite suppressant, this
syntetic árug produces fedings of happiness as well as balainations
Answers
Answer:
Ecstasy,LSD, Rohypnol
What type of chemical reaction occurs when more energy Is released during the chemical reaction than is needed to start the chemical reaction
Answers
Answer:
Explanation:
Exothermic Reactions
Exothermic Reactions
This means that the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products. Excess energy from the reaction is released as heat and light. Figure: Chemical reaction: A Hermite reaction, which produces molten iron.
Given the nuclear equation:
232U + In → Ba + Kr + 3}n + energy
28.
State the type of nuclear reaction represented by the equation.
Answers
Answer:
Nuclear fission
Explanation:
Even though the equation is not too clear, however, we can see that the uranium nucleus was bombarded with a particle leading to its disintegration to yield other nuclides.
A nuclear fission reaction is one in which a heavier nuclide is bombarded with a particle (usually a neutron) leading to the disintegration of that nuclide into other nuclides with the release of tremendous energy. More neutrons are released in the process to continue the reaction. Hence, it is a chain reaction.
When does a metallic bond present
Answers
Answer:
Metallic bonds occur among metal atoms.
Chemical ____ are used to represent compounds
Answers
Answer:
Its formula :)
Explanation:
hope this helps <3
____ Al(NO3)3 + ____ FeCl2 --> _____ Fe(NO3)2 + ______AlCl3
~
how to fix/ balance this chemical reaction?
Answers
The balanced equation
2Al(NO₃)₃ + 3FeCl₂ ⇒ 3Fe(NO₃)₂ + 2AlCl₃
Further explanationGiven
Reaction
Al(NO₃)₃ + FeCl₂ --> Fe(NO₃)₂ + AlCl₃
Required
Balanced equation
Solution
Give a coefficient
aAl(NO₃)₃ + bFeCl₂ --> Fe(NO₃)₂ + cAlCl₃
Make an equation
Fe, left=b, right=1⇒b=1
N, left=3a, right=2⇒3a=2⇒a=2/3
Cl, left=2b, right=3c⇒2b=3c⇒2.1=3c⇒c=2/3
The equation becomes :
2/3Al(NO₃)₃ + FeCl₂ --> Fe(NO₃)₂ + 2/3AlCl₃ x3
2Al(NO₃)₃ + 3FeCl₂ --> 3Fe(NO₃)₂ + 2AlCl₃
what's the FM of chlorine
Answers
Answer:
The system can operate on a set level of parts per million (ppm) chlorine, where the set level is automatically maintained.
Which of the following statements is true about chemical nutrients in an ecosystem?
A. They cannot be obtained from decomposition.
B. They flow through the system, losing some nutrients in the process.
C. They exit the ecosystem in the form of heat.
D. They recycle within the ecosystem, being constantly reused.
E. They depend on sunlight as their source.
Answers
The statement that is true about chemical nutrients in an ecosystem is : D.) They recycle within the ecosystem, being constantly reused. Therefore, option D) is the correct answer.
The nutrient cycle is vital to the ecosystem, and this is how nutrients are recycled in it. Nutrients that are considered chemical nutrients include carbon, hydrogen, oxygen, nitrogen, and phosphorus.What are chemical nutrients in an ecosystem
Chemical nutrients refer to essential elements that are found in an ecosystem's physical and chemical environment. These elements are necessary for life because they are responsible for different functions such as cell structure, the production of enzymes, and the production of hormones.
In conclusion, chemical nutrients recycle within the ecosystem, being constantly reused. Nutrient recycling helps to maintain the ecosystem's sustainability. It helps to maintain the balance of life forms within the ecosystem.
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The energy in ATP is used to fuel the movement of kinesin motor proteins along microtubules. Sort each of the following events into the proper category, indicating whether they occur on the leading or trailing head of kinesin.
-ATP hydrolysis
-ADP release
-ATP binding
-Pi release
-neck linker zippers to catalytic core of head group
Answers
The energy in ATP is used to fuel the movement of kinesin motor proteins along microtubules. Sort each of the following events into the proper category, indicating whether they occur on the leading or trailing head of kinesin.
-ATP hydrolysis
-ADP release
-ATP binding
-Pi release
-neck linker zippers to catalytic core of head group
-Leading head: ADP release, ATP binding, and neck linker zippers to catalytic core of head group
-Trailing head: ATP hydrolysis, and Pi release
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What happens to the copper sulphate crystals when they are heated that causes them to change color?
Answers
Answer:
Heating the CuSO4. 5H2O crystals causes then to loose the water of crystallisation that is the 5H2O part. It becomes anhydrous copper sulphate. Its colour changes to white from blue.
When is the mole ratio from a balanced chemical reaction not needed in a calculation
Answers
Answer:16
Explanation:
Which process causes the greatest increase in distance between particles a condensation b freezing
C melting d condensation
Answers
Answer:
condensation
Explanation:
the process that causes distance
Be3(PO4)2 # of molecules
Answers
Answer:
beryllium phosphate
Explanation:
The name of the ionic compound Be3(PO4)2 B e 3 ( P O 4 ) 2 is beryllium phosphate
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one way to analyze for the amount of phosphorus in a rock is to precipitate the phosphorus as mgnh4po4, which is then heated to tum it into mg2p2o7. what mass of mg2p2o7 will be obtained from a 2.087 g sample of a rock that contains 86.52% ca3(po4)2 (and no other source of phosphorus) if this analysis is done? hint: you will not be able to write an equation for this problem.
Answers
The mass of \(Mg_2P_2O_7\) that will be obtained would be 0.22 grams
Stoichiometric problemThe equation of the reaction is as below:
\(2MgNH_4PO_4 -- > Mg_2P_2O_7 + 2NH_3 + H_2O\)
The mole ratio of \(MgNH_4PO_4\) and \(Mg_2P_2O_7\) is 2:1.
2.087 g sample of \(MgNH_4PO_4\) contains 86.52% Ca3(PO4)2.
The actual amount of \(MgNH_4PO_4\) = 2.087 - (0.8652x2.087) = 0.2813 grams
Mole of 0.2813 grams \(MgNH_4PO_4\) = 0.2813/137.315 = 0.002mol
Equivalent mole of \(Mg_2P_2O_7\) produced = 0.002/2 = 0.001 mol
Mass of 0.001 mol \(Mg_2P_2O_7\) = 0.001 x 222.55 = 0.22 grams
In other words, the mass of \(Mg_2P_2O_7\) that will be obtained from a 2.087 g sample of a rock that contains 86.52% Ca3(PO4)2 would be 0.22 grams.
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what is a coulomnbic interaction? is the coulombic contribution to bonding stronger in lif or in mgo?
Answers
The coulombic contribution to bonding stronger is in mgo
Coulomb interaction is the electrostatic interactions between electric charges, and follows the Coulomb's law.
It is a basis of classical electrodynamics. In general, Coulomb interaction can manifest itself on various scales from microscopic particles to macroscopic bodies.
When unlike charges (one negative and the other positive) attract each other, or like charges (both positive or both negative) repel each other, Coulomb's law governs the force between them. According to this law the force of attraction or repulsion varies inversely with the square of the distance between the charges.
Higher the magnitude of the charges we have higher coulombs force of attraction. Thus, we can say that the molecule MgO has a higher attraction force between them and has a stronger ionic bond than LiF.
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