3. A very large distillation column is separating p-xylene (more volatile) from o-xylene. The column has two feeds that are saturated liquids. Feed 1 flows into the column at a rate of 90 kmol/h and contains 42 mol% p-xylene. Feed 2 flows at a rate of 20 kmol/h and contains 9 mol% p-xylene. The bottoms product should be 97 mol% o-xylene, and the distillate product should be 99 mol% p-xylene. Compute the distillate (D) and the bottoms (B) products flow rates
Answers
Answer:
the distillate (D) and the bottoms (B) products flow rates are;
B = 72.1875 kmol/hr
D = 37.8125 kmol/hr
Explanation:
Given the data in the question;
as illustrated in the image below;
F1 stream, ( 90 kmol/hr ) contains 42 mol% p-xylene and Feed 2 ( 20 kmol/hr) contains 9mol% p-xylene, so;
more volatile → p-xylene
less volatile → o-xylene
now, Overall balance;
F1 + F2 = D + B
90 + 20 = D + B
D + B = 110 ------------- let this be equation 1
p-xylene. component balance;
0.42F1 + 0.09F2 = 0.99D + 0.03B
0.42(90) + 0.09(20) = 0.99D + 0.03B
37.8 + 1.8 = 0.99D + 0.03B
0.99D + 0.03B = 39.6 --------------- let this be equation 2
from equation 1 and 2
input (D = 110 - B) into equation 2
0.99(110 - B) + 0.03B = 39.6
108.9 - 0.99B + 0.03B = 39.6
108.9 - 39.6 = 0.99B - 0.03B
69.3 = 0.96B
B = 69.3 / 0.96
B = 72.1875
now, input B = 72.1875 into equation 1
D + B = 110
D + 72.1875 = 110
D = 110 - 72.1875
D = 37.8125
Therefore, the distillate (D) and the bottoms (B) products flow rates are;
B = 72.1875 kmol/hr
D = 37.8125 kmol/hr
Related Questions
explain what is ment by solvent front
Answers
Answer:
In paper chromatography, the wet moving edge of the solvent that progresses along the surface where the separation of the mixture is occurring.
Explanation:
I hope this helps and pls mark me brainliest :)
Write a net ionic equation to show that triethylamine, (C2H5)3N, behaves as a Bronsted-Lowry base in water.
Answers
Answer:
\((C_2H_5)_3N~+~H_2O~->~(C_2H_5)_3NH^+~+~OH^-\)
Explanation:
For this question, we have to remember that definition of acid and base in the Bronsted-Lowry theory:
Acid
A substance with the ability to produce a hydronium ion (\(H^+\)).
\(HA~->~H^+~+~A^-\)
Base
A substance with the ability to accepts a hydronium ion (\(H^+\)).
\(B~+~H^+->BH^+\)
If we check the reaction mechanism (figure 1). We can see that the lone pair of electrons in the "N" atom will remove an "H" from the water molecule producing a positive charge in the nitrogen and a hydroxyl group (\(OH^-\)).
With all this in mind, the net ionic equation would be:
\((C_2H_5)_3N~+~H_2O~->~(C_2H_5)_3NH^+~+~OH^-\)
I hope it helps!
In what order do electrons fill orbitals?
A. Before pairing, 1 electron occupies each s and p orbital.
B. Electrons fill orbitals in order of increasing orbital energy.
C. Orbitals s, p, and then d fill in one energy level before starting the
next level.
D. The p orbitals fill before the s orbitals in an energy level.
SUBM
Answers
Answer:B electrons fill orbitals In order of their increasing energy from left to right
Explanation:
what is density? chemistry
Answers
Answer: Density means the compactness of an object
I hope this helps, and Happy Holidays! :)
How is this compound classified C4H6O4
Answers
The compound C4H6O4 can be classified as a dicarboxylic acid. In this case, the presence of four carbon atoms (C4) indicates that it is a relatively larger molecule.
The molecular formula also contains six hydrogen atoms (H6) and four oxygen atoms (O4). The presence of oxygen and carbon atoms suggests the possibility of carboxyl groups (-COOH) in the compound. Carboxyl groups are functional groups consisting of a carbonyl group (C=O) and a hydroxyl group (-OH) attached to the same carbon atom.
Since the compound contains four oxygen atoms, it is possible that it contains two carboxyl groups. A compound with two carboxyl groups is classified as a dicarboxylic acid. Dicarboxylic acids are organic compounds that have two carboxyl functional groups.
They are characterized by their ability to donate two protons (H+) and act as acids. Therefore, based on the molecular formula C4H6O4, the compound is classified as a dicarboxylic acid.
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How many valence electrons does an atom of Iodine have?
a) 5
b) 6
c) 7
d) 8
Answers
Scientists have discovered marine fossils in rock layers all over the world. The discovery is supported by the story of what in the Bible A Adam and Eve B Cain and Abel C Noah’s ark d Daniel in the lion’s den
Answers
Answer:
d. lions den
Helpful or not?
Answer: Noah’s ark
Explanation:
The flood is what killed everything
Considering this balanced chemical equation, how many grams of HgO will be produced when 44 g of Hg react with excess O2?
2Hg (l) + O2 (g) --> 2HgO (s)
A 28 g
B 44 g
C 48 g
D 96 g
Also, how would you go to solve this problem? Thanks!
Answers
Answer:
48g
Explanation:
2Hg(l) + O₂(g) => 2HgO
44g excess ?
44g/200.59g·mol⁻¹ = 0.219 mole Hg(l) = 0.219 mole HgO(s) produced.*
*Since coefficients are equal for Hg and HgO then the moles of HgO produced is the same as moles Hg used.
Convert 0.219 mole HgO to grams => 0.219mol x 216.95g/mol = 47.512g HgO ≅ 48g (2 sig figs)
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. The correct option is option C.
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.
2Hg(l) + O₂(g) \(\rightarrow\) 2HgO
44g excess ?
The mole ratio between Hg and HgO is 1:1.
44g÷200.59g/mol= 0.219 mole of Hg= 0.219 mole of HgO
mass of HgO=0.219mol x 216.95g/mol
= 47.512g
Therefore, the correct option is option C.
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What is the mass of an aluminum block if the density of aluminum is 2.70
g/cm and the volume of that block is 4.8 cm?
Answers
Answer: 50 M
Explanation:
Mass
Density×Volume2.7(4.8)11.6111.6gFormula used
Density=Mass/VolumeWhat does the 195 represent in the isotope notation?
195Pt
78
Answers
The representation that 195 has here is the atomic mass
What does the 195 represent in the isotope notation?
The number 195 in the isotope notation represents the mass number of the isotope. In this case, the isotope notation is for the element platinum (Pt) with a mass number of 195 and an atomic number of 78 (which is given as a subscript). The mass number is the sum of the number of protons and neutrons in the nucleus of an atom of the element. Therefore, the isotope notation for this element indicates that it has 78 protons and 117 neutrons (since 195 - 78 = 117).
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What are the possible values of 1 and m for
n=4 ?
Answers
Answer:
If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?
when two water molecules are near each other, a hydrogen bond will form between the more positive and the more negative atoms of neighboring water molecules. t or f
Answers
It is false that when two water molecules are near each other, a hydrogen bond will form between the more positive and the more negative atoms.
What is the composition of a water particle?A water particle is composed of two hydrogen atoms and one oxygen atom.
How do water particles bond?When there are two water particles close a bond is formed between the hydrogen atom of one particle and the oxygen atom of a neighbor water particle, which means there is a hydrogen-oxygen bond rather than a hydrogen-hydrogen bond.
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It is True that when two water molecules are near each other, a hydrogen bond will form between the more positive hydrogen atom of one molecule and the more negative oxygen atom of the neighboring molecule.
How is water molecules formed?A water molecule is made up of two hydrogen atoms bonded to an oxygen atom, and its overall structure is bent. This is because the oxygen atom, forms a bond with hydrogen atoms. It also carries two pairs of unshared electrons. All of the electron pairs (shared and unshared) repel each other.
Hydrogen bond will form between the more positive and the more negative atoms of neighboring water molecules when two water molecules are near each other. This is due to the polar nature of water molecules, which have a slightly positive charge on the hydrogen atoms and a slightly negative charge on the oxygen atoms. These hydrogen bonds give water many of its unique properties, such as its high surface tension and high heat of vaporization.
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In which two phase changes does energy decrease?
Answers
Answer: potential energy
Explanation: During a phase change, the heat added (PE increases) or released (PE decreases) will allow the molecules to move apart or come together. Heat absorbed causes the molecules to move farther apart by overcoming the intermolecular forces of attraction.
Iodine shines like metals but is not metal what is its basis
Answers
Answer:
Iodine is a non-metal, but it is lustrous (lustrous is the property of metal) in nature.
A beaker with 155 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.60 mL of a 0.400 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.740.
Answers
A beaker with 120mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.1M. A student adds 6.60mL of a 0.300M HCl solution to the beaker. How much will the pH change?
The pKa of acetic acid is 4.76.
Chemistry Buffer Calculations
1 Answer
Stefan V.
May 8, 2016
Δ
pH
=
0.29
Explanation:
!! LONG ANSWER !!
The idea here is that you need to use the Henderson-Hasselbalch equation to determine the ratio that exists between the concentration of the weak acid and of its conjugate base in the buffer solution.
Once you know that, you can use the total molarity of the acid and of the conjugate base to find the number of moles of these two chemical species present in the buffer.
So, the Henderson-Hasselbalch equation looks like this
∣
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
pH
=
p
K
a
+
log
(
[
conjugate base
]
[
weak acid
]
)
a
a
∣
∣
∣
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
In your case, you have acetic acid,
CH
3
COOH
, as the weak acid and the acetate anion,
CH
3
COO
−
, as its conjugate base. The
p
K
a
of the acid is said to be equal to
4.76
, which means that you have
pH
=
4.76
+
log
(
[
CH
3
COO
−
]
[
CH
3
COOH
]
)
The pH is equal to
5
, and so
5.00
=
4.76
+
log
(
[
CH
3
COO
−
]
[
CH
3
COOH
]
)
log
(
[
CH
3
COO
−
]
[
CH
3
COOH
]
)
=
0.24
This will be equivalent to
10
log
(
[
CH
3
COO
−
]
[
CH
3
COOH
]
)
=
10
0.24
which will give you
[
CH
3
COO
−
]
[
CH
3
COOH
]
=
1.74
This means that your buffer contains
1.74
times more conjugate base than weak acid
[
CH
3
COO
−
]
=
1.74
×
[
CH
3
COOH
]
Now, because both chemical species share the same volume,
120 mL
, this can be rewritten as
n
C
H
3
C
O
O
−
120
⋅
10
−
3
L
=
1.74
×
n
C
H
3
C
O
O
H
120
⋅
10
−
3
L
which is
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
n
C
H
3
C
O
O
−
=
1.74
×
n
C
H
3
C
O
O
H
a
a
∣
∣
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
(
1
)
So, the buffer contains
1.74
times more moles of acetate anions that of acetic acid.
Now, the total molarity of the buffer is said to be equal to
0.1 M
. You thus have
[
CH
3
COOH
]
+
[
CH
3
COO
−
]
=
0.10 M
Once again, use the volume of the buffer to write
n
C
H
3
C
O
O
H
120
⋅
10
−
3
L
+
n
C
H
3
C
O
O
−
120
⋅
10
−
3
L
=
0.1
moles
L
This will be equivalent to
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
n
C
H
3
C
O
O
−
+
n
C
H
3
C
O
O
H
=
0.012
a
a
∣
∣
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
(
2
)
Use equations
(
1
)
and
(
2
)
to find how many moles of acetate ions you have in the buffer
1.74
⋅
n
C
H
3
C
O
O
H
+
n
C
H
3
C
O
O
H
=
0.012
n
C
H
3
C
O
O
H
=
0.012
1.74
+
1
=
0.004380 moles CH
3
COOH
This means that you have
n
C
H
3
C
O
O
−
=
1.74
⋅
0.004380 moles
n
C
H
3
C
O
O
−
=
0.007621 moles CH
3
COO
−
Now, hydrochloric acid,
HCl
, will react with the acetate anions to form acetic acid and chloride anions,
Cl
−
H
Cl
(
a
q
)
+
CH
3
COO
−
(
a
q
)
→
CH
3
COO
H
(
a
q
)
+
Cl
−
(
a
q
)
Notice that the reaction consumes hydrochloric acid and acetate ions in a
1
:
1
mole ratio, and produces acetic acid in a
1
:
1
mole ratio.
Use the molarity and volume of the hydrochloric acid solution to determine how many moles of strong acid you have
∣
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
c
=
n
solute
V
solution
⇒
n
solute
=
c
⋅
V
solution
a
a
∣
∣
∣
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
In your case, this gets you
n
H
C
l
=
0.300 mol
L
−
1
⋅
volume in liters
6.60
⋅
10
−
3
L
n
H
C
l
=
0.001980 moles HCl
The hydrochloric acid will be completely consumed by the reaction, and the resulting solution will contain
n
H
C
l
=
0 moles
→
completely consumed
n
C
H
3
C
O
O
−
=
0.007621 moles
−
0.001980 moles
=
0.005641 moles CH
3
COO
−
n
C
H
3
C
O
O
H
=
0.004380 moles
+
0.001980 moles
=
0.006360 moles CH
3
COOH
The total volume of the solution will now be
V
total
=
120 mL
+
6.60 mL
=
126.6 mL
The concentrations of acetic acid and acetate ions will be
[
CH
3
COOH
]
=
0.006360 moles
126.6
⋅
10
−
3
L
=
0.05024 M
[
CH
3
COO
−
]
=
0.005641 moles
126.6
⋅
10
−
3
L
=
0.04456 M
Use the Henderson-Hasselbalch equation to find the new pH of the solution
pH
=
4.76
+
log
(
0.04456
M
0.05024
M
)
pH
=
4.71
Therefore, the pH of the solution decreased by
Δ
pH
=
|
4.71
−
5.00
|
=
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
0.29 units
a
a
∣
∣
−−−−−−−−−−−−−
Answer link
Related topic
Buffer Calculations
Questions
Related questions
How are buffer solutions used?
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How do you buffer a solution with a pH of 12?
Why are buffer solutions used to calibrate pH?
What is the role of buffer solution in complexometric titrations?
How you would make 100.0 ml of a 1.00 mol/L buffer solution with a pH of 10.80 to be made using...
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Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas form aqueous glucose C6H12O6 and oxygen O2 gas. Calculate the moles of water needed to produce 0.075mol of glucose. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits
Answers
Answer: 0.45 moles of water are needed to produce 0.075mol of glucose.
Explanation:
The balanced chemical reaction is:
\(6CO_2(g)+6H_2O(l)\rightarrow C_6H_{12}O_6(aq)+6O_2(g)\)
According to stoichiometry :
1 mole of glucose require = 6 moles of \(H_2O\)
Thus 0.075 moles of glucose require = \(\frac{6}{1}\times 0.075=0.45\) moles of \(H_2O\)
0.45 moles of water are needed to produce 0.075mol of glucose.
When 7.524 is rounded to 3 sig figs it will be
Answers
When 7.524 is rounded to 3 significant figures, it will be 7.52.
The process of changing a number to a nearby number with fewer significant digits is known as rounding.
Rounding can be done to the nearest integer, the nearest tenth, the nearest hundredth, and so on.
Here are some pointers on rounding numbers to a certain number of significant digits:If the digit following the last significant digit is less than 5, simply drop it and all following digits.
(round down)For example, 2.832 rounded to two significant digits is 2.8 since the 3 is followed by a 2 which is less than 5.
If the digit following the last significant digit is greater than 5, add 1 to the last significant digit, then drop all of the digits that follow it.
(round up)For example, 4.673 rounded to two significant digits is 4.7 since the 3 is followed by a 7 which is greater than 5.
If the digit following the last significant digit is exactly 5, the preceding digit is odd, and no other digits follow, increase the last significant digit by 1.
If the digit following the last significant digit is exactly 5, the preceding digit is even, and no other digits follow, simply leave the last significant digit alone.
For example, 2.875 rounded to two significant digits is 2.9 since the 5 is followed by an odd number, which means that the 8 should be rounded up, while 2.765 rounded to two significant digits is 2.8 since the 5 is followed by an even number, which means that the 6 should be left alone.
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The density of an object depends on mass
and volume. If there are two cubes that are
exactly the same volume, which cube will have
the highest density?
Answers
Answer: chemistry question??
Explanation:
NEED ANSWER FAST 50 POINTS
A mixture of copper sulfate and water is heated, leaving a residue of copper sulfate in the container. Which method was used to separate the mixture?
A. chromatography
B. evaporation
C. filtration
D. distillation
Answers
The method used to separate copper sulfate and water mixture was evaporation.
Explanation:
Chromatography is a separation technique used in labs. In this technique, there are two phases, the mobile phase, and the stationary phase. The phase in which the mixture is dissolved is termed as mobile phase and the phase which serves as a carrier through the system like, sheet, capillary, etc. is termed as mobile phase.Evaporation is a process in which the action of heat is employed to separate dissolved solids from liquid. Due to heat liquid gets evaporated leaving the solid behind.Filtration is a process in which insoluble particles are separated from the liquid by allowing them to pass through a porous substance such as filter paper. Distillation is a process used in the separation of the mixture of liquids with different boiling points.So, from this, we can conclude that the method used to separate copper sulfate and water mixture was evaporation.
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Answer:
Just did this on my test the answer is evaportion.
Explanation:
What process do you think occurred in stars and supernovae to produce the atoms that make up everything on Earth?
Answers
Answer:
A big star collapsing creates a shock wave that can trigger fusion events in the star's outer shell, which is how I believe the process that took place in stars and supernovae to form the atoms that make up everything on Earth happened. Nucleosynthesis is the process by which these fusion processes produce new atomic nuclei. One of the primary sources of the universe's heavy elements is thought to be supernovae. It is possible to synthesize materials heavier than iron, such as uranium and gold, during a supernova because the star emits enormous amounts of energy and neutrons. All of these components are launched into space during the supernova explosion.
A tree burns down and forms ashes
Physical or
Chemical
Answers
Answer:
It is a chemical change.
Explanation:
A tree burning down would be a chemical change because the composition of the tree is what changes, not just the physical characteristics.
What happens to the amount of solution when we add food colour to it?
Answers
Answer:
We need more? What else is in the question? This is unanswerable.
Explanation:
What mass of NaCl is needed to produce a 26.4 mol/L with a 1.7 L volume?
Answers
we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.
To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.
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In a protein molecule, the number of amino acid molecules may be as few as
5
5,000
500
50
Answers
In a protein molecule, the number of amino acid molecules may be as few as d. 50.
Proteins are large macromolecules composed of chains of amino acids. These amino acids are linked together through peptide bonds to form the primary structure of a protein. The number of amino acids present in a protein molecule can vary greatly and depends on the specific protein.
Proteins can range in size from small peptides composed of just a few amino acids to large complex proteins containing thousands of amino acids. The minimum number of amino acids required for a protein to be considered functional is typically around 50. This is because proteins need a certain length and structural complexity to carry out their specific functions.
Proteins play vital roles in living organisms and are involved in various biological processes such as enzyme catalysis, cell signaling, structural support, and immune response. The specific number and sequence of amino acids in a protein molecule determine its unique structure and function.
Therefore, while some proteins may consist of as few as 50 amino acids, larger and more complex proteins can contain thousands of amino acids, enabling them to perform intricate and diverse functions within living systems. Therefore, Option D is correct.
The question was incomplete. find the full content below:
In a protein molecule, the number of amino acid molecules may be as few as
a. 5
b. 5,000
c. 500
d. 50
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Hey yalll ok so like I need help & this is science or chemistry or whatever yall would like to call it! Can yall help me? I am having problems with this and I dont understand this so if yall could help me that would be Wonderfulllll! <3
Answers
Answer:
ill help but i cant see the problem
Explanation:
Vsepr diagram for phcl2
Answers
Which of the following examples of energy can be both Potential Energy and Kinetic Energy?
O Electromagnetic Energy
O Chemical Energy
O Nuclear Energy
O Mechanical Energy
Answers
what the the noble gas configuration for krypton
Answers
Answer:
[Ar] 3d¹⁰ 4s² 4p⁶
Explanation:
Krypton is a chemical element with the symbol Kr and atomic number 36. It is a colorless, odorless, tasteless noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. With rare exceptions, krypton is chemically iner,
Which of the following increases as you move from left to right across a row of the
periodic table?
A atomic number
B atomic radius
C reactivity
D tendency to form ions
Answers
As you move from left to right across a row of the periodic table, the atomic number increases, meaning there are more protons in the nucleus of the atom.
Atomic number is the number of protons in the nucleus of an atom, which determines its chemical properties and place in the periodic table of elements. The atomic number is represented by the symbol Z and is the whole number located above an element's symbol in the periodic table.
Elements are arranged in order of increasing atomic number, and elements with the same atomic number belong to the same element, regardless of their mass number or number of neutrons.
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Which of the following is an incorrect representation for a neutral atom?
36Li
613C
3063Cu
1530P
Answers
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li
To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.
Let's analyze the given representations:
36Li:
This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.
613C:
This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.
3063Cu:
This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.
1530P:
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.
Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.
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