Answer:
3.2043 x 10²³
Explanation:
No. of Mole of lead (Pb) = 0.532 mol
No. of atoms of lead = ?
Solution:
Formula Used to calculate
no. of moles = numbers of particles (ions, molecules, atoms) /Avogadro's number
Avogadro's no. = 6.023 x10²³
So,
The formula could be written as
no. of atoms of lead Pb = no. of moles x 6.023 x10²³
Put the values in above formula
no. of atoms of lead Pb = 0.532 mol x 6.023 x10²³
no. of atoms of lead Pb = 3.2043 x 10²³
so 3.2043 x 10²³ atoms of lead are contained in 0.532 mole.
A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the molarity of the solution? Show your work.
Answer:
1.3005 M
Explanation:
Given that,
Mass of NaCl = [tex]76 \ g[/tex]
Molar mass of NaCl= [tex]22.99+35.45=58.44\ g/mol[/tex]
The formula for calculation of moles,
Moles,
[tex]n=\frac{given \ mass}{molar\ mass}\\n=\frac{76}{58.44} \ g/mol\\n=1.3005\ g/mol[/tex]
Given that volume [tex]=1\ ltr[/tex]
Molarity,
[tex]=\frac{moles\ of\ solute}{litre\ of\ solution} \\=\frac{1.3005}{1}\\ =1.3005\ M[/tex]
Therefore the molarity is 1.3005 M.
What’s the ph of a 6.7*10^-5 m H+ solution
Answer:
Ph= -log10[H+}
Explanation:
Ph+ -log 10(6.7*10-5)≅ 4
Answer:
4.17
Explanation:
A - ethene
B - oxygen
C - carbon dioxide
D - water
Answer:
ethene is a limiting reagent here
why do elements in a given group of the periodic table show similar chemical properties?
Answer: Why do all the members of a group have similar properties? They have similar properties, because they share similar amounts of electrons in their outer shell, valence electrons! This means they will only be able to interact with other elements with those electrons so they often show similar properties.
Explanation:
The number of
is different for each element and is known as the
number,
Answer:
Electrons, Atomic Number
Explanation:
The total number of electrons is different for each and every element of the periodic table.
It is known as the atomic number of an element.
Mendeleev's Periodic Table's principle:
The properties of the elements is a periodic function of their atomic mass.
But, this was true only for the lighter elements.
So, the principle of the Long Form of the Periodic Table is:
The properties of the elements is a periodic function of their atomic numbers.
What’s red lion fish habitat ?
Answer:
Are native to the reefs and rocky crevices of the Indo-Pacific, although they've found their way to warm ocean habitats worldwide.
Explanation:
How is electronegativity used in determining the ionic or covalent character of the bonding between two elements?
Answer:
If the electronegativity difference between bonded atoms are too much high ionic bonds are formed if the electronegativity diference is 0.4 or less than 0.4 non polar covalnet bond formed the difference greater than 0.4 polar covalent bond formed.
Explanation:
Ionic bond:
It is the bond which is formed by the transfer of electron from one atom to the atom of another element.
Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.
For example:
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion.
Covalent bond:
It is formed by the sharing of electron pair between bonded atoms.
The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.
For example:
In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive.
what is the constant of 4x-2y+3
Answer:
3
Explanation:
The constant is 3 because it has no variable attached to it. It is constantly 3 despite any change in variables' values.
Define energy conservation.
Answer:
Energy Conservation is the effort made to reduce the consumption of energy by using less of an energy service.
Energy conservation refers to both the physical principle that energy cannot be created or destroyed and the practical approach of reducing energy consumption and improving efficiency. It involves both changes in individual behaviors and technological advancements to lower energy use and waste.
Energy Conservation Defined
Energy conservation is an important concept in Physics that refers to two key ideas. Firstly, it encompasses the principle that energy cannot be created or destroyed, only transformed from one form to another. This is known as the Conservation of Energy principle. Secondly, in a more practical sense, energy conservation relates to methods and strategies aimed at reducing energy waste and enhancing efficiency. This includes behaviors like turning off lights when not in use, driving efficiently, and using energy-efficient appliances.
Conservation of energy ensures that we reduce our consumption, either by decreasing activities that use energy or by improving the efficiency with which we perform tasks. An example of increasing efficiency would be implementing technological advancements, such as better-insulated homes, which require less energy for heating.
In summary, energy conservation serves both as a fundamental physical law and as a practical approach to manage and reduce energy usage in our daily lives. This dual understanding facilitates the development of sustainable practices and the creation of more efficient technologies, aimed at minimizing our ecological footprint.
PPLLLZZZ HHEEEELLLPPPP
Answer:
B) Cell Membrane
Explanation:
A) Chloroplasts are NOT in all cells, A is incorrect
C) Centrioles are for cell division, C is not correct
D) Cell walls are NOT in all cells, D is not correct
B) the cell membrane is responsible for materials traveling into and out of the cells to maintain homeostasis
Suppose you held a lighted match to a solid hunk of wood and another match to a pile of wood shavings. Which form of wood will catch fire more easily?
Answer:
wood shaving
Explanation:
fire would spread faster
hope that helps
Answer:
The pile of wood will catch fire more easily because the shavings of wood will be heated faster as compared to the hunk of wood.
Explanation:
The reasons for wood shaving will be burnt faster than hunk of wood are:
The wood shavings are the small peeled pieces of wood that absorb heat much faster to reach ignition temperature. The wood shavings have a surface area lower than the wooden hunk, which makes it a lot easier for them to catch fire and spread. The combustion reaction takes place during the burning of wood. The larger the surface area, the more will be the oxygen molecules required to collide with the surface, thus, the wooden log will be burnt lately than wooden shavings.Therefore, the wood shavings will be burnt faster than the hunk of wood because of the smaller surface area and the combustion reaction will be faster than hunk of wood.
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what is the number of electrons shared between the atoms in a molecule of nitrogen, N2
Answer:
3 electrons is contributed from each Nitrogen atom.
Total 6 electrons are shared in N₂.
Explanation:
Nitrogen is belong to group VAit have 5 electron in its outer most Shell.it need 3 electrons complete its octet to become stable.Nitrogen have total 7 electrons.its atomic number is 7The electronic configuration of Nitrogen is as:
1s², 2s², 2p³
it exist in diatomic form standard temperature and pressure.
Nitrogen form covalent bond and share 3 electron from each side.
total 6 electron are shared between 2 nitrogen atom.
For Covalent bonding it can share its 3 electrons.
The diagrammatic representation is in attachment.
Answer:
3!!!!
Explanation:
i have the same assignment for chem, lol
What NaCl concentration results when 309 ml of a 0.690 m NaCl solution is mixed with 467 ml of a 0.330 m NaCl solution?
Answer:
The resulting NaCl solution has a concentration of 0.4732 M
Explanation:
Concentration is the ratio of amount of solute present in a solution to the amount of solvent or total solution. Morality is the commonly used unit of concentration.
[tex]Concentration=\frac{(\text{Moles of solute})}{(\text{Volume of solution})}[/tex]
Since we are given with same NaCl solution, we have
[tex]\frac{(M_1 V_1+M_2 V_2)}{(V_1+V_2 ) }[/tex]....................(1)
Where
[tex]M_1= 0.690 m[/tex]
[tex]V_1= 309 ml[/tex]
[tex]M_2= 0.330 m[/tex]
[tex]V_2= 467 ml[/tex]
Now substituting the values in equation in (1)
=>[tex]\frac{( (0.690\times 309 )+(0.330\times 467))}{(309+467) }[/tex]
=>[tex]\frac{ (213.21\times 154.11)}{776}[/tex]
=>[tex]\frac{367.32}{776}[/tex]
=>0.4732 M
The resulting concentration when 309 ml of a 0.690 m NaCl solution is mixed with 467 ml of a 0.330 m NaCl solution is 0.473 M.
Explanation:To find out the resulting concentration of NaCl when two solutions of different concentrations and volumes are mixed, we need to determine the total amount of NaCl and the total volume of the solution. The mole of NaCl in a solution can be determined by multiplying the molarity of the solution by its volume.
For the first solution, the number of moles of NaCl = volume (L) × molarity (M) = 0.309 L × 0.690 mol/L = 0.2133 mol
For the second solution, the number of moles of NaCl = volume (L) × molarity (M) = 0.467 L × 0.330 mol/L = 0.154 mol
The total moles of NaCl = 0.2133 mol + 0.154 mol = 0.367 mol
The total volume = volume of first solution + volume of second solution = 0.309 L + 0.467 L = 0.776 L
Finally, the resulting concentration = total moles / total volume = 0.367 mol / 0.776 L = 0.473 M
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Describing Enzymes
QUICK CHECK
Which of the following characteristics are true of enzymes? Check all that apply.
The structure of an enzyme can change if conditions change.
A single enzyme can normally catalyze a wide variety of reactions under many conditions.
Enzymes are found only in nonliving systems.
Enzymes allow living things to regulate body conditions through feedback mechanisms.
Enzymes bind to specific substrates in specific ways.
Enzymes increase the rate of reaction.
When shown in energy-reaction diagrams, enzymes represent the higher activation energy.
Enzymes are proteins that can change structure under different conditions, assist in body regulation through feedback mechanisms, bind to specific substrates in specific ways, and increase the rate of reactions. However, they are specific to one reaction, found in living organisms, and represent lower activation energy on diagrams.
Explanation:The following characteristics are true of enzymes:
The structure of an enzyme can change if conditions change. This is due to the fact that enzymes are proteins, and their structure can be affected by external conditions like temperature and pH. Enzymes allow living things to regulate body conditions through feedback mechanisms. They enable the body to respond to changes in the environment by speeding up or slowing down chemical reactions. Enzymes bind to specific substrates in specific ways. This is known as 'enzyme-substrate specificity', and it refers to the fact that each enzyme can only catalyze one particular type of reaction due to the specific shape of its active site. Enzymes increase the rate of reaction. They do this by lowering the activation energy required for a reaction to occur, effectively making the reaction proceed more quickly.
However, some points are incorrect. An enzyme cannot catalyze a wide variety of reactions - it is specific to one type of reaction. Also, enzymes are not found only in nonliving systems; they are a crucial part of all living organisms. Finally, in energy-reaction diagrams, enzymes represent the lower, not higher, activation energy.
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What are all of the pressure conversions ? like torr atm kPa
Answer:
Explanation:
Torr:
Torr is the measure of pressure produced by one mmHg equal to the 1/760 of standard pressure used to the pressure of vacuum system.
Millimeter mercury mmHg:
It is the manometric pressure unit. It is defined as, the pressure exerted by column of mercury one millimeter high. it is represented by mmHg.
Torr to mmHg conversion:
Both are equal to each other.
1 torr = 1 mmHg
Torr to atm:
Torr is converted into atm by dividing the torr value 760.
mmHg to atm.
mmHg is converted into atm by dividing the torr value 760.
Kilopascal:
The kilopascal is the unit of pressure. It is represented by KPa.
it is the pressure generated by 10 g mass of substance on area of 1 cm².
There are 1000 pascal in one kilopasca.
one atm = 101.325 KPa
one atm = 101325 Pa
atm can be converted into KPa by multiplying the given atm value with 101.325.
For example:
4.1 atm × 101.325 kpa/ 1 atm
415.432 atm. kpa / 1atm
415.432 kpa
Kpa to atm:
415.432 kpa/101.325 kpa × 1 atm
4.1 × 1 atm
4.1 atm
Pressure units such as pascals (Pa), kilopascals (kPa), atmospheres (atm), millimeters of mercury (mm Hg), and torr are commonly used in chemistry. The standard conversion equivalencies enable accurate measurement when switching between these units. For example, to convert torr to atm, divide by 760, and to convert psi to kPa, multiply by 6.895.
Understanding pressure conversions is important in chemistry when dealing with gases. The most common units of pressure are pascals (Pa), kilopascals (kPa), atmospheres (atm), millimeters of mercury (mm Hg), and torr. The relations between these units are as follows:
1 bar = 100,000 Pa = 1.01325 atm
To convert these units, use the specified equivalencies. For example, to convert from torr to atm, use the following formula:
Pressure in atm = Pressure in torr / 760
To convert 32 psi to kPa: 32 psi * 6.895 = 220.64 kPa (as 1 psi = 6.895 kPa)
To convert 6.50 millibars to atm: 6.50 m bars / 1013.25 = 0.00642 atm (since 1 bar = 1.01325 atm, and 1 mbar = 0.001 bar)
It's essential to use these conversion factors correctly to obtain accurate pressure values in different units.
A student uses a magnet to move a 0.025 kg metal ball. The magnet exerts a
force of 5 N, which causes the ball to begin moving. What is the acceleration of
the ball when it begins to move?
Answer:
The acceleration of the ball is 200 m/s².
Explanation:
Force:
Force is the push or pull on an object with mass that causes it to change velocity or to accelerate.
Force represents as a vector, which means it has both magnitude and direction.
Given:
Mass of metal ball = 0.025 kg
Force = 5 N
To Find:
Acceleration, = ?
Solution:
Formula:
[tex]Force = Mass\times Acceleration\\F= ma\\5 = 0.025\times Acceleration\\Acceleration = \frac{5}{0.025} \\Acceleration = 200\ m/s^{2}[/tex]
The acceleration of the ball is 200 m/s².
What’s the element?
How many reactants in each?
How many products in each?
Is it balanced?
You may find bellow the answers and the balanced chemical reactions.
Explanation:
2) The chemical reaction is:
2 Na + I₂ → 2 NaI
Na - sodium
I - iodine
In this reaction there are 2 reactants and 1 product.
The reaction is balanced.
3) The chemical reaction is:
N₂ + O₂ → 2 N₂O
N - nitrogen
O - oxygen
In this reaction there are 2 reactants and 1 product.
The reaction is not balanced, the balanced reaction is:
2 N₂ + O₂ → 2 N₂O
4) The chemical reaction is:
N₂ + 3 H₂ → 2 NH₃
N - nitrogen
H - hydrogen
In this reaction there are 2 reactants and 1 product.
The reaction is balanced.
5) The chemical reaction is:
2 KI + Cl₂ → 2 KCl + I₂
K - potassium
I - iodine
Cl - chlorine
In this reaction there are 2 reactants and 2 products.
The reaction is balanced.
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A chemist obtains a 0.300 M solution of HCI and adds 10.0 mL of the HCI to CaCO3 how many moles of HCI did she add?
Answer:
Number of moles = 0.003 mol
Explanation:
Given data:
Molarity of HCl = 0.300 M
Volume = 10.0 mL (0.01 L)
Number of moles of HCl added = ?
Solution:
Formula:
Molarity = number of moles / volume in litter
Number of moles = Molarity × volume in litter
Number of moles = 0.300 mol/L × 0.01 L
Number of moles = 0.003 mol
Name the element which lies in group IA and 3rd period. What is the valency of it and why?
Answer:
Na, valency 1.
Explanation:
Na -sodium.
This element is in the 1A group, so it has 1 electron on the last (valent) level.
So, only 1 electron can participate in forming chemical bond, and therefore the valency of Na is 1.
Final answer:
Sodium (Na) is the element in group IA and the 3rd period, and it has a valency of 1 because it has one valence electron that it can lose to form a +1 cation.
Explanation:
The element that lies in group IA and the 3rd period of the periodic table is Sodium (Na). The valency of sodium is 1, which refers to its ability to combine with other atoms and ions. This valency is because sodium falls in group IA, where the elements have one valence electron that they can lose to form a cation with a +1 charge. The group number for elements in groups 1 and 2 directly correspond to their valences, which is why sodium has a valency of 1.
Which element has higher ionization energy? chlorine or carbon
Answer:
chlorine has higher ionization than carbon
Explanation:
Chlorine is only one row below carbon, but it is three columns to the right in this case the IP of chlorine would be predicted to be greater than the IP of carbon.
Why is density a physical property but volume isn’t?
Answer:
Density is a physical property but volume isn’t because density is intensive property but volume is extensive property.
Explanation:
EXTENSIVE PROPERTY- A property of matter like volume and mass which depends on the amount of being measured is called extensive property.
INTENSIVE PROPERTY- A property of matter like colour and density which does not depend on the amount of the substance present is called intensive property.
450g of chromium(iii) sulfate reacts with excess potassium phosphate. How many grams of potassium sulfate will be produced? (ANS: 6.0*10^2g K2SO4) I need the working and there are a couple more of these if someone's tryna help my dumb self.
Answer:
1597.959 g
Explanation:
Given Data:
Amount of Cr₂(SO₄)₃ = 450 g
Amount of potassium phosphate K₃PO₄ = in Excess
grams of potassium sulfate K₂SO₄= ?
Solution
The Reaction will be
Cr₂(SO₄)₃ + 2K₃PO₄ ----------> 3K₂SO₄ + 2CrPO₄
Information that we have from reaction
Cr₂(SO₄)₃ + 2K₃PO₄ ----------> 3K₂SO₄ + 2CrPO₄
1 mol 2 mol 3 mol
we come to know from the above reaction that
1 mole of chromium(iii) sulfate (Cr₂(SO₄)₃) react with 2 mole of potassium phosphate (K₃PO₄) to produce 3 mole of K₂SO₄
We also know that
molar mass of Cr₂(SO₄)₃ = 147 g/mol
molar mass of K₃PO₄ = 212 g/mol
molar mass of K₂SO₄ = 174 g/mol
if we represent mole in grams then
Cr₂(SO₄)₃ + 2K₃PO₄ ----------> 3K₂SO₄ + 2CrPO₄
1 mol (147 g/mol) 2 mol (212 g/mol) 3 mol (174g/mol)
So, Now we have the following details
Cr₂(SO₄)₃ + 2K₃PO₄ ----------> 3K₂SO₄ + 2CrPO₄
147 g 424 g 522 g
So,
we come to know that 147 g of Cr₂(SO₄)₃ combine with 424 g of 2K₃PO₄ produce 522 g of K₂SO₄
So now we calculate that how many grams of potassium sulfate will be produced
Apply unity formula
147 g of Cr₂(SO₄)₃ ≅ 522 g of K₂SO₄
450 g of Cr₂(SO₄)₃ ≅ ? g of K₂SO₄
by doing cross multiplication
g of K₂SO₄ =522 g x 450 g / 147 g
g of K₂SO₄ = 1597.959 g
So the write answer is 1597.959 g
***Note: By calculation it is obvious that the correct answer is 1597.959 g
Which of the following is a common industrial use for a mineral? (2 points)
A common industrial use for a mineral is in water purification and as an ingredient in antacids. Minerals like fluorite (calcium fluoride) are extensively used in various industries.
Explanation:A common industrial use for a mineral is in water purification and as an ingredient in antacids. Minerals like fluorite (calcium fluoride) can be used extensively in various industries. For example, it can be prepared by the reaction of aqueous solutions of calcium chloride and sodium fluoride to yield solid calcium fluoride, which has several industrial applications.
155.4 grams of carbon tetrachloride to atoms
30.41 × 10²³ atoms
Explanation:
First we calculate the number of moles of carbon tetrachloride (CCl₄):
number of moles = mass / molar weight
number of moles of CCl₄ = 155.4 / 153.8 = 1.01 moles
Now to find the number of atoms in 155.4 grams of carbon tetrachloride we use Avogadro's number:
if in 1 mole of CCl₄ there are 5 × 6.022 × 10²³ atoms
then in 1.01 moles of CCl₄ there are X atoms
X = (1.01 × 5 × 6.022 × 10²³) / 1
X = 30.41 × 10²³ atoms
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Where would an element be placed on the periodic table if it had a mass number of 304 amu, very low ionization energy, bonds easily with other elements, melting point of 50.1 degrees Celsius, has the smallest electronegativity, predicatively the largest atomic radius, great metallic character, and silver in color
Answer:
As the atomic number is half of the atomic mass then it probably have 304/2 = 152 atomic number that will be placed before atom having atomic number 153 and after atom that have 151 atomic number.According to all its properties it will be somewhere in the left or middle of the periodic table and will be at the bottom. At the bottom in the super actinide metals series.Explanation:
Data Given:
Predict place of element in the periodic Table having following properties
mass number = 304 amu
Ionization energy = very low
bonds = easily bond with other elements
melting point = 50.1° C
electronegativity = smallest
Atomic radius = largest
metallic character = great
color = silver
Periodic Table is the table where elements were placed based on their atomic number.
In 1913 Mosley construct the periodic table according to their atomic number.
Modern Periodic Law :
the physical and chemical Properties of the elements are the periodic functions of their atomic number.
Atomic Number:
Atomic number is the number of electron or proton, denoted by Z
Z = e or P
Atomic Mass:
Atomic mass is the number of proton plus neutron in the nucleus. it is denoted by A.
A = P + N
Atomic number is almost half of the atomic mass for majority of the element.
Periodicity of periodic Table:
properties of the element repeat itself at certain interval.
Periodicity of Properties is as follow
1. Ionization energy:
The Ionization energy increase from left to right and decreases down the group.
2. Electronegativity:
E.N increase from left to right and decreases down the group.
3. metallic character:
Metallic character increase down the group and decrease from left to right. metals have metallic color, bristle and shiny surface.
4. non-metallic character
Non-metallic character decreases down the group and increases from left to right.
5. Melting point and boiling Point:
Melting point and boiling Point increases when the metallic character increase and decreases when the metallic character decreases.
6. Atomic radius :
Atomic Radius decrease from left to right and increases from top to bottom as shells are added.
Now keeping in mind all above points, to predict the place of the atom whose properties are given.
As the atomic number is half of the atomic mass then it probably have 304/2 = 152 atomic number that will be placed before atom having atomic number 153 and after atom that have 151 atomic number.According to all its properties it will be somewhere in the left or middle of the periodic table and will be at the bottom. At the bottom in the super actinide metals series.14. What is the actual temperature 3000 km below the surface of the Earth?
Answer:
temperature 3000 km below the surface of earth is varied, it's harder to know the actual temperature, it can be found around 3,000 - 3,500 degrees Celsius
The actual temperature 3000 km below the surface of the Earth is around 3,000-3,500 degrees in the lower mantle.
What is the earth's mantle?The mantle of the earth is the mostly-solid bulk of Earth’s interior. The mantle of the earth is that layer that lies between the thin outer layer, the crust, and Earth’s dense, super-heated core.
The mantle of the earth is about 3000 Km thick and creates a whopping 84% of Earth’s total volume. The early mantle is the molten material that surrounded the core.
The rocks that make up the mantle are mostly silicates which are compounds that share a silicon and oxygen structure. The other major kind of rock is magnesium oxide and other mantle elements are calcium, iron, aluminum, sodium, and potassium.
The temperature of the mantle varies from 1000° Celsius near its boundary with the crust to 3500° Celsius near its boundary with the core.
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2 Points
Maria was riding her bike at a velocity of 3 m/s to the north. Her velocity
changed to 11 m/s to the north. What was her change in velocity?
A. -8 m/s north
O
B. 3 m/s north
O
C. 8 m/s north
O
D. 14 m/s north
Answer:
B
Explanation:
She stopped for 4 minutes
She was decreasing in speed
Answer:
The correct answer it 8 m/s north
Explanation:
My test answers
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The acceleration due to gravity on Earth is 9.80 m/s2. If the mass of a honeybee is 0.000100 kilograms, what is the weight of this insect? 0.100 g / 0.0000102 N / 0.000980 N / 0.000100 kg
Answer:
w = 0.00098 N
Explanation:
Given data:
Acceleration = 9.80 m/s²
Mass of honey = 0.0001 Kg
weight = ?
Solution:
Formula:
w = mg
w = weight
m = mass
g = acceleration due to gravity
Now we will put the values in formula:
w = 0.0001 Kg × 9.80 m/s²
w = 0.00098 N
Calculate the OH− concentration after 53 mL of the 0.100 M KOH has been added to 25.0 mL of 0.200 M HBr. Assume additive vol- umes.
Answer in units of M.
Answer:
[tex]\large \boxed{\text{0.0038 mol/L}}[/tex]
Explanation:
1. Calculate the initial moles of acid and base
[tex]\text{moles of acid} = \text{0.0250 L} \times \dfrac{\text{0.200 mol}}{\text{1 L}} = \text{0.005 00 mol}\\\\\text{moles of base} = \text{0.053 L} \times \dfrac{\text{0.100 mol}}{\text{1 L}} = \text{0.0053 mol}[/tex]
2. Calculate the moles remaining after the reaction
OH⁻ + H₃O⁺ ⟶ 2H₂O
I/mol: 0.0053 0.005 00
C/mol: -0.00500 -0.005 00
E/mol: 0.0003 0
We have an excess of 0.0003 mol of base.
3. Calculate the concentration of OH⁻
Total volume = 53 mL + 25.0 mL = 78 mL = 0.078 L
[tex]\text{[OH}^{-}] = \dfrac{\text{0.0003 mol}}{\text{0.078 L}} = \textbf{0.0038 mol/L}\\\\\text{The final concentration of OH$^{-}$ is $\large \boxed{\textbf{0.0038 mol/L}}$}[/tex]
Who am I? Periodic table 20 questions
We can see here that the elements from the Periodic Table are:
1. Chlorine (Cl)
2. Manganese (Mn)
3. Argon (Ar)
4. Sodium (Na)
5. Phosphorus (P)
6. Iron (Fe)
7. Boron (B)
8. Copper (Cu)
9. Neon (Ne)
10. Tungsten (W)
11. Mercury (Hg)
12. Potassium (K)
13. Calcium (Ca)
14. Radon (Rn)
15. Beryllium (Be)
16. Cobalt (Co)
17. Barium (Ba)
18. Oxygen (O)
19. Helium (He)
20. Vanadium (V)
What is Periodic Table?The periodic table is a tabular arrangement of the chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. Elements are presented in order of increasing atomic number, which corresponds to the number of protons in the nucleus of an atom.
The periodic table is divided into periods (rows) and groups (columns), and it provides a systematic way to understand and categorize the elements. It's an essential tool in chemistry for understanding the relationships between different elements and their properties.
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