Answer:
that is simple
electronic configuration s,p,d,f
we know that it's represented element
thus block also represented by s,p,d,f
same
Explanation:
that how it's are related are in the periodic table .
Answer:
Explanation:
The electronic configuration of an element is related to its position on the periodic table.
The links are:
the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in
the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in
the number of electrons in all shells of an element is represented in the periodic table as the element's atomic numbe
WILL GIVE BRAINLIST IF RIGHT
While visiting Thor's Hammer in Bryce Canyon National park, you observe red coloring on the landform. What natural process most likely caused the red coloring? (4 points)
Chemical weathering
Deposition
Erosion
Mechanical weathering
Answer:
Chemical weathering because the landform changed color
Explanation:
Answer: A) Chemical Weathering
Explanation:
I took the test :)
find ionic compounds
Answer:
1:1
Explanation:
The ratio of metal cationic atom to non-metal anionic atom in the compound is 1:1.
This is an ionic compound.
This is because metal cationic atom has two valence electrons. Non-metal anionic oxygen has six valence electrons Calcium loses two of its valence electrons to be isoelectronic with Ar and this confers a stable configuration to it. Non-metal oxygen atom accepts the electrons and adds 2 to its 6 electrons to become isoelectronic with neon. So, 1 metal cationic atom combines with 1 non-metal anionic atom to form the compound.What does it mean for a system to be in dynamic equilibrium?
Answer:
a state of balance between continuing processes.
Explanation:
Dynamic equilibrium only occurs in reversible reactions, and it's when the rate of the forward reaction is equal to the rate of the reverse reaction.
In another experiment, the student titrated 50.0mL of 0.100MHC2H3O2 with 0.100MNaOH(aq) . Calculate the pH of the solution at the equivalence point.
pH=8.87
Further explanationReaction
C₂H₄O₂+NaOH⇒CH₃COONa+H₂O
at the equivalence point = mol C₂H₄O₂= mol NaOH
mol C₂H₄O₂ : 50 x 0.1 = 0.5 mlmol=5.10⁻⁴ mol
The two reactants have completely reacted, and there is only salt(CH₃COONa) and water(H₂O), there will be hydrolysis
For acids from weak acids and strong bases (the solution is alkaline) then the calculation:
[tex]\tt [OH^-]=\sqrt{\dfrac{Kw}{Ka}\times M }[/tex]
M=anion concentration=CH₃COO⁻
Ka=acid constant(for CH₃COOH,Ka=1.8.10⁻⁵)
[tex]\tt [OH^-]=\sqrt{\dfrac{10^{-14}}{1.8.10^{-5}}\times 0.1 }[/tex]
[tex]\tt [OH^-]=\sqrt{5.6.10^{-11}}=7.483\times 10^{-6}[/tex]
pOH=6-log 7.483=5.13
pH= 14 - 5.13=8.87
The pH of the solution is the negative log [H] concentration. The pH of the given solution is 8.87 at the equivalence point.
pH:The given Reaction is:
C₂H₄O₂+ NaOH ⇒ CH₃COON + H₂O
The pH of the solution can be calculated by,
[tex]\bold{pH = 14 - pOH}[/tex]................1
So first, calculate for pOH
[tex]\bold {pOH = \sqrt {\dfrac {Kw}{Ka} \times M}}[/tex]
Where,
Ka - dissociatioon constant = 50 x 0.1 = 0.5 ml = 5x10⁻⁴ mol
Kw - concentaion water ionic products = [tex]\bold {10^{-14}}[/tex]
M - anion concentration( CH₃COO⁻) = 0.1 M
Put the values in the formula,
[tex]\bold {pOH = \sqrt {\dfrac {\bold {10^{-14}}}{5\times 10^{-4} mol} \times 0.1}}\\\\\bold {pOH = 7.483 \times 10^{-6}}[/tex]
Since the pOH is the negative log of [OH⁻] concentration,
pOH = 6 -ln 7.483
pOH = 5.13
Put the value of pOH in the first equation,
pH= 14 - 5.13
pH = 8.87
Therefore, the pH of the given solution is 8.87 at the equivalence point.
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Changes in which two characteristics can indicate a physical change?
A. Shape
B. Reactivity
O C. State
D. Flammability
Changes in shape and state are the two characteristics which indicate a physical change.
What are physical changes?Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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How many moles would there be in 500,000,000,000 atoms of silver? Show your calculation
and answer in unit
Answer: 3.01 * 10^35
Explanation:
500,000,000,000 * 6.02 * 10^23
There are 3 [tex]\rm \times\;10^3^5[/tex] moles of silver present in the 500,000,000,000 atoms of silver.
According to the concept of molar mass:
1 atom = [tex]\rm 6.023\;\times\;10^2^3[/tex] moles
500,000,000,000 atoms of silver can be written as:
5 [tex]\rm \times\;10^1^1[/tex] atoms of silver.
1 atom = [tex]\rm 6.023\;\times\;10^2^3[/tex] moles
5 [tex]\rm \times\;10^1^1[/tex] atoms = 5 [tex]\rm \times\;10^1^1[/tex] [tex]\times[/tex] [tex]\rm 6.023\;\times\;10^2^3[/tex] moles
5 [tex]\rm \times\;10^1^1[/tex] atoms = 30.115 [tex]\rm \times\;10^3^4[/tex] moles
= 3 [tex]\rm \times\;10^3^5[/tex] moles.
The moles of silver are present in the 500,000,000,000 atoms of silver are 3 [tex]\rm \times\;10^3^5[/tex] moles.
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Rank these elements from smallest to largest atomic radii: zinc, calcium, radium, and bromine.
Select one:
O a. calcium, radium, zinc, bromine
O b. calcium, zinc, bromine, radium
c. bromine, zinc, calcium, radium
d. bromine, zinc, radium, calcium
Answer:
The correct option is;
c. Bromine, zinc, calcium, radium
Explanation:
The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups
The location of each of the elements are;
Zinc: Period 4, Group 12
Calcium: Period 4, Group 2
Radium: Period 7, Group 2
Bromine: Period 4, Group 17
Therefore, the element with the largest atomic radius = Radium
The element with the smallest atomic radius = Bromine
Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc
The rank of the elements from smallest to largest atomic radius is therefore;
Bromine, zinc, calcium, radium.
The atomic mass unit is based on which element?
Carbon-12
Carbon-12 is the reference for all atomic mass calculations. An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12.
can i has help?
A 2-column table with 7 rows. The first column labeled Material has entries aluminum, iron, lead, sand, steel, wood, water. The second column labeled Specific Heat (Joules per gram times degrees Celsius) has entries 0.90, 0.44, 0.16, 0.83, 0.49, 1.80, 4.18.
Use this chart showing the different specific heat of various materials to answer the questions.
Which material has the highest specific heat?
Which material has the lowest specific heat?
Which material has the ability to absorb twice as much heat as aluminum when placed in the same environment of mass and temperature?
Answer:
water, lead, and wood
Explanation:
All are correct on Edg 2020
Answer:
Which material has the highest specific heat?
water
Which material has the lowest specific heat?
lead
Which material has the ability to absorb twice as much heat as aluminum when placed in the same environment of mass and temperature?
wood
Explanation:
How many protons are in the nucleus of one atom of neon based on this information found in the Periodic Table?
Answer:
10 protons
Explanation:
The atomic number of an element is equal to the number of protons of the element. The atomic number of neon is 10. Therefore, neon contains 10 protons.
10 protons are in the nucleus of one atom of neon based on this information found in the Periodic Table.
What is periodic table ?The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements. It is frequently used in physics, chemistry, and other disciplines and is frequently regarded as a symbol of chemistry.
The elements are organized in what is known as the periodic table. Columns and rows are used to organize the table. The horizontal rows are referred to as "periods," while the vertical columns are known as "groups."
Thus, The atomic number of an element is similar to the number of protons of the element. The atomic number of an element neon is 10. So, neon contains 10 protons.
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Phillip throws a basketball up in the air and through a hoop. Because the ball is acted on by the force of gravity, the ball will —
Answer:
Fal down to the flour
Explanation:
Because of gravity their is weight that weight keeps us down to earth everything has weight even a leaf not only weight but the atmosphere is like a wall that keeps us safe from all the stuff in space.
Fill in the blanks. SPELLING COUNTS!!
Types of Forces
A
repel
is a force that causes an object to move away from the thing pushing it.
A
magnet
is a force that causes an object to move toward the thing pulling it.
Motion is caused by familiar
like a push, pull, friction, gravity, and magnetic attraction.
is a force which resists motion and can also create heat.
Magnetism is a force that can
(pull) and
(push).
Gravity
is a force that pulls objects toward the Earth’s center.
Please answer the blank question or answer all for brainliest
Answer:
cocooooooooooooooooooooooooooo
Explanation:
3n\hj 3ihhjcvyh 6]0u70-uh]h ]]huc7]]uh uhu-hu -u h-u7-u37-]u3- -7u7uh5h57h0u70y c0yuuh-u-]u]3u3 cuyuycuy0nuy0yc6udy8056uy08
Ung number three po plssssssssssss.
Answer:
For #3 I believe it's A
Explanation:
It can't be changed INTO a solid because it already is one.
Hope this helps!
why is the chemical reaction between nitric acid and sodium hydroxide called a neutralization reaction?
Answer:
Because nitric acid is acidic in nature and sodium hydroxide is basic in nature so when acid and base react they become neutral.
I added 6 to a certain number and then divide the result by 3. Find the number if my final answer is 5. (show working)
Answer:
let the number be x
so (x+6)/3 =5
x+6=15
x=9
Complete the sentence by using the drop-down menus
to choose the words that describe the image most
accurately
To make an omelet, first
the egg and then let
the insides slide
into the bowl.
Answer:
1st one: crack
2nd: carefully
Explanation:
Answer:
Crack and then carefully
Explanation:
I just did it in edgen 2020
{b}
In experiment B. the iron filings weighed 2.0g at the beginning of the experiment
and the iron sulphide produced weighed 2.8g.
Explain this increase in mass.
Explanation:
The increase in mass is because the iron fillings have combined with a sulfide to produce iron sulfide and so the mass will increase.
In such a reaction like this, the mass of the reactants must be conserved. By so doing, the mass of reactants and products must be the same.
When two substances combine together, their masses added up to that of the individual masses. This helps to conserve the mass.
give me examples of everyday problems you think involve the green substances copper acetate or copper sulfate.
Answer: Copper sulfate is also called blue vitriol, Roman vitriol, Salzburg vitriol, blue copperas or bluestone, which is an inorganic or chemical compound comprised of Copper, Sulphur and Oxygen. It is an odorless crystalline substance, electric blue and highly toxic, which is produced in industries by treating the copper metal with hot concentrated sulfuric acid or treating its oxides with dilute sulfuric acid. It can be produced by slowly leaching low-grade copper ore in air and bacteria may be used to hasten the process.
When electricity is passed through a common salt solution. Sodium hydroxide is
produced along with the liberation of the two gases X and Y. X burns with pop
sound whereas Y is used for disinfecting drinking water.
a) Identify X and Y
b) Give the chemical equation for the reaction stated above
c) State the reaction of Y with dry slaked lime,
Answer:
a)oxygen and chlorine
b) H20+NaCl= NaOH + O+ Cl
c) Cl2+ Ca(OH)2=CaOCl2+CaCl2 +HCL
Explanation:
electricity splits up the molecules for water and hydrogen displaces chlorine because its is more reactive.
Complete each of these
Which of the following phrases best describes an atom? Choose the two correct answers.
A.
made up of protons, electrons, and neutrons
B.
made up of solids, liquids, and gases
C.
largest unit of matter
D.
smallest unit of matter
E.
made up of water
Answer:
A & D
Explanation:
all of the other things are made up of atoms, not what atoms themselves are made of. they are not large, and they make up all matter
An atom is made up of a nucleus and revolving electrons. Inside the nucleus protons and neutrons are located. Thus the components of an atom are protons, electrons and neutrons. Thus, option A is correct.
What is an atom?An atom is the basic unit of every substances. Atoms combine together to form molecules, molecules then forms compounds and so on.
The inner core of an atom is called nucleus which contains positively charged particles namely protons and neutral particles neutrons. There are circular paths of fixed energy surrounding the nucleus.
The circular paths around the nucleus is called orbits through which the electrons are revolving. Electrons are negatively charged particles and they neutralize equal number of positive charges.
A neutral atom have equal number of protons and electrons and this number is called its atomic number. The sum of number of protons and neutrons is called the mass number.
Hence, an atom is made up of protons, electrons, and neutrons and option A is correct.
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hello, what’s the difference between oxidation and oxidising agents?
Answer:
An oxidising agent oxidises something else. Oxidation is loss of electrons (OIL RIG). That means that an oxidising agent takes electrons from that other substance.
Explanation:
Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g). How much hydrogen chloride was used in the reaction
We have that for the Question,it can be said that How much hydrogen chloride was used in the reaction is
x=74.42From the question we are told
Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g).
How much hydrogen chloride was used in the reactionHow much hydrogen chloride was used in the reactionGenerally the equation for the Reaction is is mathematically given as
Mg+2HCl-----MgCl2+H2
Grams of MgCl2=[tex]\frac{96.9*24.30}{2.04}\\[/tex]
Grams of MgCl2=1154.25g
Therefore
ON cK -12
How much hydrogen chloride was used in the reaction is
x=74.42
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im in the middle of a chem test and i literally have no clue what is happening
Answer:
No question so I'm just taking the points
Am i gay?
I cant tell so i may need a third party to tell me whether i like men or not
Answer:
ok
Explanation: whatever you think
Would you rather get tips or a commission for your wages? Why?
Answer:
commission
Explanation:
Employers benefit from paying a commission to their employees because it means that they only pay the employee if there is a sale. ... It also improves the cash flows of the business because it means that employees are only paid when money is coming in from a sale.
If i were a maneger I would love commision For the reason that is stated above, but if I was just an employe I would rather work from tips.
What are the coefficients when the chemical equation below is balanced?
_Fe + _H2SO4 = _Fe2(SO4)3 + _H2
A) 2,3,3,3
B) 3,2,3,1
C) 1,1,1,1
D) 2,3,1,3
please answer these questions!
Explanation:
1)
Equation -
Propane + oxygen → carbon dioxide + water
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Here,
Products are -
Carbon dioxide (CO₂) Water (H₂O)2)
Equation -
AgNO₃ (aq.) + NaCl (s) → AgCl ↓ + NaNO₃ (aq.)
Double Displacement reactionHelp! Please will give brainliest for right answer!
Answer:
a positive nucleus gets smaller the negative electrons are attached closer in
Explanation:
The rock was white and black speckled with a density of 2.6 g/mL. Physical or chemical property?
Answer:
Chemical
Explanation: