Answer:
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The electronic configuration of the Chlorine atom after the gain of one electron (Cl⁻) is 1s²2s²2p⁶3s²3p⁶. Therefore, option (D) is correct.
What is an electronic configuration?The electron configuration is used to explain how electrons are filled in different energy levels of an atom of an element. In the electron configuration, the number of electrons is used to write as a superscript of electron-containing atomic subshells. For example, the electron configuration of Helium is written as 1s²2s².
The principal quantum number (n) is used to denote the maximum number of electrons that can be filled in an electron shell. It is evaluated by using the formula 2n², where ‘n’ is the principal quantum number.
The atomic number of the Chlorine atom is 17 and the electronic configuration is 1s²2s²2p⁶3s²3p⁵. When it gains one electron then it has 18 electrons in total. The 18 electrons in chlorine atoms are filled as 1s²2s²2p⁶3s²3p⁶.
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How do some insects take advantage of the surface tension of water?
one should know properties of constituents of a mixture to separate the mixture .Why?
Answer:
Because: The mixtures contain unwanted substances which may be harmful and may degrade the properties of mixtures. So we, need to separated them and extract useful substances.
Answer:
The composition of the mixture is very important, as a result of nature exists solely by its properties, and also the reactions may be separated.
What are 3 examples of making diluted solutions in "regular" life?
what are examples of diluted?
Answer:
Do it your self bro
Explanation:
You lazy bum do it yourself
A sodium nitrate solution was prepared in the lab to have a concentration of 0.467 M. If 50. mL of a 6.00 M stock solution was used to prepare this sodium nitrate solution, what volume of water was added to the original 50. mL of stock solution? Provide the appropriate units (mL or L) to your response.
the treaty of versailles ended world war i, but some of the terms of the treaty contributed to the beginning of world war ii. which was one of the terms of the treaty? the answer would be "germany was forces to pay reparations to the allied countries.". i hope this .
Explanation:
A sample of gas at 53.0 oC and 1.19 atm occupies a volume of 2.3 L. What volume would this gas occupy at 107 oC and 0.60 atm?
Answer:
[tex]V_2=5.32L[/tex]
Explanation:
Hello there!
In this case, according to the given pressure, temperature and volume, it is possible for us to calculate the final volume via the combined ideal gas law:
[tex]\frac{P_2V_2}{T_2}=\frac{P_1V_1}{T_1}[/tex]
In such a way, we solve for the final volume, V2, to obtain:
[tex]V_2=\frac{P_1V_1T_2}{T_1P_2}[/tex]
Then, we plug in the given data to obtain:
[tex]V_2=\frac{1.19atm*2.3L*380K}{326K*0.60atm}\\\\V_2=5.32L[/tex]
Regards!
what determines the identity of a substance?
proton
neutron
electron
photon
Answer:Typically, the identity of a substance can be described by a: chemical name, for example, benzene; number, for example, EC number 200-753-7, and.
Explanation:chemical composition, for example, >99 % benzene and <1 % toluene. The composition is determined by chemical analysis.
Answer:
proton
Explanation:
thats what my bio teacher just said
How many liters are in 1576.94 mL?
Answer:
1.57694 L
Explanation:
To convert from mL to L, you simply divide the value by 1000.
NO FILES PLZ HELP
When a solid produced by a chemical reaction separates from the solution it is called...
a precipitate.
a molecule.
b. a reactant.
d. the mass of the product.
Answer:
a. Precipitate
Explanation:
solids can precipitate out of the solution and be left over after the reaction. reactants are incorrect because they are reacted to cause the reaction. b and d are also irrelevant terms.
In which type of biochemical are amino acids found?
Hemoglobin
Olive oil
Potato starch
DNA
Answer: Hemoglobin
Explanation: Got it on the test
In Hemoglobin amino acids are found.
What is Amino Acid ?
Amino acids are the organic compounds that comprises functional groups like amine [tex](-NH_{2})[/tex] and carboxyl (-COOH). It combines to form the proteins. Amino acids are known building components of proteins.
How to identify a Amino acidAmino acids have
a amino groupa carboxyl group a hydrogenan R-group.Now check all the options one by one:
Option (A): A Hemoglobin molecules consist of oligoprotein. It has 4 polypeptide chain which contain 2 alpha chain which contains 141 amino acid and 2 beta chain which contain 146 amino acid. Glutamine, valine and serine are the amino acids which is required for Hemoglobin. So it is correct option.
Option (B): Olive oil mainly contained fatty acids which are monosaturated. So it is incorrect option.
Option(C): Potato starch contains only starch. It forms a complex carbohydrate. So it is incorrect option.
Option (D): In DNA hydrogen bonds are present not peptide bond. So it is incorrect option.
Thus, we can say that In Hemoglobin amino acids are found.
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Can someone please check my answer?
Yes the ANSWER is Correct-
On first half life the mass will be 10 gram
On second half life the mass will be 5 gram
On third half life the mass will be 2.5 gram
BONUS QUESTION - It takes 194 mL of a 0.5 M NaOH solution to neutralize 300
mL of an HCl solution. What is the concentration of the HCl solution? (3 pts)
NaOH + HCL » NaCl + H,O
Answer:
1.7 mol/dm3
Explanation:
working out in the image
Classify the chemical equations as being balanced or not balanced.
2CO + 2NO → 2CO2 + N2
6CO2 + 6H2O → C6H12O6 + O2
H2CO3 → H2O + CO2
2Cu + O2 → CuO
A standard lanthanum solution is prepared by dissolving 0.1968 grams of lanthanum oxide (La2O3) in excess nitric acid and diluting to one liter in a volumetric flask. Calculate the concentration of the solution expressed as molarity of lanthanum nitrate and as ppm lanthanum.
Answer:
1.208x10⁻³M and 392.5ppm La(NO3)3
Explanation:
The reaction that occurs is:
La2O3 + 6HNO3 → 2La(NO3)3 + 3H2O
Molarity is defined as the moles of solute (In this case, LaO3) per liter of solution. And ppm, are mg of solute per liter of solution.
To solve this question we must find the moles of La(NO3)3 produced and its mass in milligrams to find molarity and ppm:
Moles La2O3 -Molar mass: 325.81g/mol-
0.1968g * (1mol / 325.81g) = 6.04x10⁻⁴ moles La2O3
Moles La(NO3)3:
6.04x10⁻⁴ moles La2O3 * (2mol La(NO3)3 / 1mol La2O3) = 1.208x10⁻³ moles La(NO3)3
Molarity:
1.208x10⁻³ moles La(NO3)3 / 1L =
1.208x10⁻³MMass La(NO3)3 -Molar mass: 324.92g/mol-
1.208x10⁻³ moles La(NO3)3 * (324.92g / mol) = 0.392.5g La(NO3)3
In mg:
392.5mg La(NO3)3 / 1L =
392.5ppm La(NO3)3
Name the following hydrocarbon:
Br
Br
A. 1,3-dibromopentane
B. 2,4-dibromoethane
C. 1,3-dibromoethane
D. 2,4-dibromopentane
London dispersion forces decrease with increasing number of electrons decreasing number of electrons
Answer:
Increasing number of electrons
Explanation:
London dispersion forces are intermolecular forces that occur due to momentary shifts in the electron cloud of atoms or molecules.
London dispersion forces are most commonly observed as the predominant kind of intermolecular forces in non-polar substances.
Generally, it is observed that the strength of these London dispersion forces tends to increase as the number of electrons in the substance increases.
Question 6
6.7 pts
A solution has a very high electrical conductivity, turns litmus paper red and has a pH of 2.0. This is most likely
a(n)
Base/Strong Electrolyte
Acid/Weak Electrolyte
Acid/Strong Electrolyte
Base/Weak Electrolyte
Next
« Previous
Answer:
Acid/String Electrolyte
Explanation:
Litmus paper turning red means it is an acidic solution. A pH of more than 7 is Base while pH of less than 7 is an acid. Since the pH is 2, less than 7, it s is an acid. Since it has a high electrical conductivity, it must be a strong Electrolyte.
2. What is peat?
the aromatic compounds that are part of coal
O a soft, spongy material that may be changed into coal
O a mixture of methane, ethane, and other gaseous hydrocarbons
a very hard, dense form of coal
Answer:
a soft, spongy material that may be changed into coal
Explanation:
What kind of reaction shows two reactants combining to form one new product?
What kind of reaction shows two reactants combining to form one new product?
A) a single-replacement reaction
B) a double-replacement reaction
C) a decomposition reaction
D) a synthesis reaction
How many moles of Fe₂O₃ are there in 0.54 liters of a 1.6 M solution?
Answer: 0.86 mol
This is a molarity problem, in which M is defined by:
[tex]\frac{n(moles of solute)}{v(liters of solution)}[/tex]and the units are moles/liter
With this information in mind, we can plug in M and v already so that:
1.6 [tex]\frac{mol}{L}[/tex]= [tex]\frac{xmol}{0.54L}[/tex] of Fe₂O₃
If we multiply 0.54 L from both sides, we will get:
0.864 mol = x mol of Fe₂O₃
Rounding that to sigfigs, we get that the number of moles within this Fe₂O₃ solution is 0.86 mol; therefore, that is the answer.
I hope this helped!
Part B
DIRECTIONS: Identify the type of heat transfer depicted in each picture by arranging the
jumbled letters and answer the questions that follows.
Answer:
1. conduction
2. Convection
3. Radiation
pls help me guys please please only 1 question choose
Answer:
D.4 types of molecules is yr ans.
stay safe healthy and happy.
Increasing the surface area between solute and solvent Select one: a. has no effect on the rate of dissolution. b. decreases the rate of dissolution. c. can increase, decrease, or have no effect on the rate of dissolution. d. increases the rate of dissolution.
Increasing the surface area between solute and solvent, increases the rate of dissolution.
What is rate?Rate of any process will gives idea about the speed of the completion of that happening process.
Dissolution is a process in which solute particles gets dissolve in the solvent medium. If we increases the surface area of any one medium of the solution like solute or solvent then the rate of dissolution increases, as it increases the space to get attracted to each other.
Hence, option (d) is correct.
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What is the SUM of the coefficients for the balanced chemical equation below?
PLEASEEEE
how could you get the crystals in a supersaturated solution back into the solution?
1. If CO2 is being produced in the solution at a faster rate than H2CO3, is the rate of the forward or reverse reaction faster?
Answer:
I believe that it would be faster but the reaction would not happen immediately. It would take a long time for the effect to start kicking in but it will definitely speed up the process of CO2 being released into our atmosphere.
Explanation:
If CO₂ is being produced in the solution at a faster rate than H₂CO₃, then the rate of the forward reaction is faster.
What is the rate of a reaction?Rate of any reaction tells about the duration of the completion of reaction to produce products.
Given chemical reaction is written as:
H₂CO₃ ⇄ CO₂ + H₂O
In the question it is given that CO₂ is produced at the faster rate, and it is the product of the forward reaction. So, we conclude that rate of forward reaction is faster.
Hence, the rate of forward reaction is faster.
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2. What is the best way to test a hypothesis?
O by conducting research
by designing and performing an experiment
by designing an experiment
O by making an educated guess
Answer:
by designing and performing an experiment
Explanation:
This is because hypothesis refer to a guess or explanation that is made base on limited evidence and it is proposed for further experiment.
The best way to know whether your hypothesis is true is to design and conduct an experiment. When this is done, the outcome will determine whether the hypothesis is true and valid or not.
how do you start a hypothesis in science which includes scientific words and information which is on how much sugar can dissolve in water using the temperature of the solvent which is the water?
Answer: If ... Then... Because...
Explanation: if I water this plant twice a day then it will grow 3 feet because the more water it gets the bigger it grows
please help
explain in sentences
Describe how ice is involved in both weathering and erosion processes.
Answer: Ice causes erosion to take place. Ice forms in a crack and causes the rock to break. Erosion: when ice melts, liquid water preforms the act of erosion by carrying away the tiny rock fragments lost in the split. The specific process(the freeze thaw cycle) is called frost weathering or cryofracturing.
Explanation:
D is a green crystalline solid that dissolves in water to give a very pale green solution addition of sodium hydroxide solution to a solution of D
Answer:
I think its iron(II) oxide
Explanation:
The substance is black but when it's mixed with water it turns green solution so when mixed with sodium Hydroxide it turns green
explain how soil can affect the composition of the solution that move through it
Answer: Soils are formed through the interaction of five major factors: time, climate, parent material, topography and relief, and organisms.
Soil structure affects plant growth in many, often surprising, ways. The most obvious effects are on root growth, which is strongly inhibited by hard soil, and which in turn influences the ability of the root system to extract adequate water and nutrients from the soil.
Explanation:
https://www.publish.csiro.au/sr/pdf/SR9910717
This is where I gather some info.