Answer: Boron
Explanation:
hope this helps
Answer: Boron.
Explanation: The trend of atomic radius increases as we go from right to left on a periodic table, so since Boron is further left, Boron has a slightly larger radius.
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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Help me out here please?
Answer:
B
Explanation:
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.
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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If I have 13 protons and 12 electrons what is my charge?
Answer:
The charge would be +1
Explanation:
Protons have a positive charge while electrons have a negative charge. Therefore, it's simple subtraction. In every case, subtract the number of electrons from the number of protons.
13 - 12 = 1
Therefore the charge is +1
Here's one more example:
If the element chromium (Cr) has 24 protons and 28 electrons, what is its charge? Remember that protons have a positive charge and electrons have a negative charge.
24 - 28 = -4
Charge = -4
It would be written as followed when associating charge with a specific element: [tex]Cr^{-4}[/tex]
If an element has a neutral charge, that means the number of protons and neutrons are the same. If you look at the periodic table of elements, all of the elements listed have a neutral charge. The 0 isn't showed in the corner because it isn't necessary.
Bonus Information:
This isn't related to your question, but I've come across confusions when it comes to particles. Remember that protons (+) and electrons (-) are the only particles that have a charge, therefore, as it says in it's name, neutrons are neutral or have no charge. Neutrons do not contribute to charge, but they do contribute to the mass of an atom. So the number of protons added to the number of neutrons equate to the mass of an atom. Electrons have mass, but it's so miniscule and insignificant that it doesn't even contribute to the overall mass of the atom, so don't count those.
Remember:
C = p - e
M = p + n
C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons
I hope this helps!
A block with a volume of 24 cm3 has a mass of 1200 g. What is the density of this block
Answer:
The answer is 0.02 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{24}{1200} = \frac{1}{50} \\ [/tex]
We have the final answer as
0.02 g/cm³Hope this helps you
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:
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.
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.
In the quantum mechanical model, what two words do they use to describe
particles?
Answer:
This question is incomplete
Explanation:
This question is incomplete but one can assume the answer from the definition of quantum mechanics. Quantum mechanics is the science that describes particles in nature at the atomic and subatomic particle (electron, proton and neutron) level. Thus it can be assumed that atoms and subatomic particles are used to broadly describe particles.
what is the molar mass of Agl2
Answer:
107.8682
Explanation:
....................
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
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage has __________ energy.
A. Kinetic
B. Potential
Answer:
B
Explanation:
The carriage has potential energy
What is the symbol for tin on the periodic table
and how many protons does it have?
Answer:
Symbol for tin- Sn
No. of protons =50
Explanation:
Hope this helps you
Crown me as brainliest
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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Kendrick goes to his neighborhood gym to exercise. The process of cellular respiration makes it possible for him to run on the treadmill and to lift weights. What do Kendrick's cells do during cellular respiration?
His cells convert kinetic energy into chemical energy.
His cells use oxygen to break down food molecules to release energy.
His cells absorb light energy through the chlorophyll in their chloroplasts.
His cells combine water and carbon dioxide to produce oxygen and glucose.
Answer: His cells use oxygen to break down food molecules to release energy
Explanation:
Answer:B
Explanation:
The table below compares some of the properties of three different objects that are all made of pure substances.
Object Melting Point Mass Volume
X 327.5°C 10 g 25 cm3
Y 1,083°C 10 g 12.5 cm3
Z 327.5°C 5 g 12.5 cm3
According to the table, which of the following is most likely true?
Answer:
c. object y is made of a different substance than x and z
Explanation:
why well i did the study island and it told me the answer why so don't ask
Words made from letters of the alphabet are similar to molecules made from atoms. Based on what you already know about matter, which statement best explains this comparison?
A. Atoms can make many different molecules, just like letters can make many different words.
B. Molecules must contain many different atoms, just like words must contain many different letters.
C. There are 26 different atoms that are used to form molecules, just like there are 26 different letters that are used to form words.
D. There are no rules for how letters combine to make words, just like there are no rules for how atoms combine to make molecules.
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option A.
What is atom?
Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Atoms can make many different molecules, just like letters can make many different words.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
Therefore, the correct option is option A that is Atoms can make many different molecules, just like letters can make many different words.
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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
DOING STUDY ISLAND, NEED HELP
Thermal energy is a form of... A. kinetic energy. B. electrical energy. C. potential energy. D. chemical energy.
Answer:
A. Kinetic Energy
Explanation:
Thermal energy is when the molecules and atoms are vibrating faster due to higher temperatures.
Kinetic energy fits this because the meaning of it is the energy of a moving object.
Since thermal energy comes from moving molecules and atoms, it is therefore a for of kinetic energy.
Which of the following statements is false?
a.
To be an effective listener, you must avoid distractions.
b.
To be an effective listener, you must only communicate with people who share your listening style.
c.
To be an effective listener you must look for nonverbal messages.
d.
To be an effective listener you must be ‘other-oriented’.
Answer:
B
Explanation:
I think B is false because you should communicate with all sorts of people, in order to learn different views/sides of something.
which state of matter is more dense?
solids have more dens than any type of matter and I am sure btw
Answer:
Gas - Liquid - SolidExplanation:
If you are asking which state of matter is more dense of which, then this is the order.
- Liquid is more dense than Gas
- Solid is more dense than Liquid
- Gas is less dense than Air
Just to let you know, Solid is the most dense of them all, making Gas the least dense of the three.
Hope this helps! ^^
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
Which structure carries instructions for producing the proteins that help make a person’s hair curly?
phosphate
deoxyribose
lipid
gene
Answer: Bipalium kewense is a species of flatworm that can reproduce sexually; however, instead it usually breaks into two pieces, each of which becomes a fully functioning adult.
What is the main method of reproduction for these flatworms?
binary fission
fragmentation
sporulation
fertilization
Answer:
The correct answer should be :D). Gene on edg.
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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If the half-life of Uranium-235 is 176000 years and 12.5 g of Uranium-235 remain after 704000 years, how much of the radioactive isotope was in the original sample.
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
When you add so much solute that no more dissolves you have a(n)
Answer:
When you add so much solute that no more dissolves you have a SATURATED SOLUTION.
Answer:
iIt is called as point of saturation or saturated solution
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 :)
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.