Which row in the table shows how many electrons there could be in the outer shell of an atom of V?
Answers
Answer:
Explanation:
The element V forms acidic oxide so it must be non- metal because oxides of non metal forms acidic oxide like sulphur ( s ) or chlorine ( Cl₂ )
sulphur forms SO₂ or SO₃ . Chlorine forms acidic oxide like Cl₂O₇ , Cl₂O₃ etc
These oxides are covalent compounds .
So V may have 6 or 7 electrons in the outermost orbit .
Hence option D is the right answer.
Related Questions
The s orbital can hold
A. eight electrons.
B. two electrons.
C. six electrons.
D. 12 electrons.
Answers
Answer:
B. Two electrons
Explanation:
Since the S orbital is closest to the nucleus and it only has one orbital, it can only hold 2 electrons
Because it is nearest to nucleus
So we can fill two electrons only
What would form a solution
Answers
Featured snippet from the web
A solution is made when one substance called the solute "dissolves" into another substance called the solvent. Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules.
Which phrase describes an irregular galaxy?
O has a round shape
O contains many young stars
O has arms that extend from the center
O is larger than other types of galaxies
Answers
Answer: The answer would be B. contains many young stars.
Explanation:
There is very little new star formation in Irregular galaxies. Irregular galaxies have no particular shape and are smaller than other types of galaxies.
The irregular galaxy possess many young stars.
Irregular galaxyThey are the most unusual of galaxies.
They do not fit into either the elliptical or spiral galaxy categories.
They do not possess nice spiral arm, however, they do possess dark patches of dust and gas.
The irregular galaxies do not possess definite shape.
They comprise of several young stars as the extent of the formation of stars in irregular galaxies in brisk. They also do comprise old stars.
Thus, the correct statement is contains many young stars.
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hello:) I’m a little confused because the textbook says it forms water but the notes from my school says that it forms salt and water :/
Answers
Answer:
Yes, it form Salt and Water
Bee stings release methanoic acid which attacks the nerves in the skin. They can be
neutralized by applying a cream that contains
a) ammonia
b) vitamin C
c) sulphur dioxide
d) acetic acid (vinegar)
Answers
Answer:and so an acid should be applied to neutralize them and remove the pain.
Explanation:Bee and Wasp stings can be both painful and itchy, and are very common ... Many common household substances can be used for this, and vinegar and ... If you are near other Bees and Wasps,
Ammonia can be used to neutralise. Hence, option A is correct.
What is methanoic acid?It is the simplest carboxylic acid which consists of a single carboxylic acid group (COOH) which is attached to a hydrogen atom.
Ammonia is a great way to help neutralise the venom of a bee sting. All you need to do is create a thick paste out of baking soda and water and apply it to the sting.
Hence, option A is correct.
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Which noble gases can form compounds and under what conditions? Give EXAMPLES
Answers
Answer:
Following
Explanation:
Based on difference in electro negatives between atoms, which is the most polar bond pair? A. H — S B. H — CI C. H — O D. H — F (Put a explanation)
Answers
Good luck
Answer:
the option c is correct H-oExplanation:
I hope this helps u have a nice dayOne mole of any gas at room
temperature and pressure will
occupy liter(s).
A. 10
B. 1
C. 22.4
D. 24
Reset Selection
Answers
One mole of any gas at room temperature and pressure will occupy 22.4 liter(s) (option C).
What is an ideal gas?Ideal gas is an hypothetical gas, whose molecules exhibit no interaction, and undergo elastic collision with each other and with the walls of the container.
One mole of an ideal gas contains a volume of 22.414 L at standard temperature and pressure (STP).
According to Avogadro's law, the volume occupied by one mole of a gas must be the same for all gases if the temperature and pressure are the same.
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What is measured by the reaction rate? the probability that a reaction will occur the speed at which products form the time required for a reaction to go to completion
Answers
Answer: the speed at which products form
Explanation:
Rate of a reaction is defined as the speed at which a chemical reaction proceeds. It is often expressed in terms of the concentration of a reactant that is consumed in a unit time or the concentration of a product that is formed in a unit of time.
For a general reaction :[tex]A\rightarrow B[/tex]
[tex]Rate=-\frac{d[A]}{dt}[/tex]
or [tex]Rate=+\frac{d[B]}{dt}[/tex]
where d[A] = change in concentration of reactant A
d[B] = change in concentration of product B
dt = time interval
Suggest why the colour of the copper sulfate solution fades during electrolysis.
Please help! Thank you:)
Answers
Answer:
The traces of hydrogen ions are not discharged, so you not see any gas bubbles collecting on the negative cathode electrode. The blue colour fades as more and more copper is deposited, depleting the concentration of the blue copper ion Cu2+ ions in solution.
Explanation:
Which statement correctly describes Earth’s magnetic field?
A) A compass can lead a hiker to the geographic North Pole.
B) The magnetic pole near the South Pole is a north pole.
C) Compasses point toward a magnetic pole that is a north pole.
D) Field lines circle Earth from east to west.
Answers
Answer:
B) The magnetic pole near the South Pole is a north pole.
Explanation:
The north pole on the compass is the geographical South Pole.
Hope it helps.
Answer:
The answer is B.
Explanation:
How many grams of lactic acid (C,H,O) are in 1 liter of a 0.5M solution of lactic acid?
And how many grams of lactic acid are in the above solution?
Answers
Answer:
a mole of lactic acid = 90 g
a 0.5 M solution would require 1/2 mol or 45 g
Explanation:
The molecular mass is 90 d, the combined atomic masses of its atoms.
There are 45 grams of lactic acid in 1 liter of a 0.5M solution of lactic acid
CALCULATE THE NUMBER OF MOLES IN THE SOLUTION:
The number of moles of lactic acid (C3H6O3) in the solution can be calculated by multiplying the molarity (M) of the solution by its volume (L). That is;no. of moles = molarity × volume
According to this question, the 1L lactic acid solution has a molarity of 0.5M, hence, the number of moles is calculated as follows:no. of moles = 1 × 0.5
no. of moles = 0.5moles of lactic acid
CALCULATE THE MASS OF LACTIC ACID:
The mass in grams of lactic acid can be calculated by multiplying the molecular mass of lactic acid (C3H6O3) by its number of moles i.e.Mass = no. of moles × molar mass
Molar mass of (C3H6O3) = 12(3) + 1(6) + 16(3)
= 36 + 6 + 48
= 90g/mol
Mass of lactic acid = 0.5 mol × 90 g/mol
Mass of lactic acid = 45grams.
Hence, there are 45 grams of lactic acid in 1 liter of a 0.5M solution of lactic acid.
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Which element has a larger atomic radius than aluminum (AI)?
The Periodic Table
O A. Boron (B)
B. Silicon (Si)
O C. Nitrogen (N)
O D. Sodium (Na)
Answers
Answer:
The correct answer is D because i did this before and got it right.
Explanation:
Which of the following is a polar molecule?
O A. A carbon monoxide molecule (CO)
OB. A linear carbon dioxide molecule (CO2)
OC. A calcium oxide molecule (Cao)
O D. An oxygen molecule (0)
Answers
Answer:
D. An oxygen molecule (0)
Explanation:
Hope it helps.
HELP ME PLZ!!! I really dont know this!!! What characteristic of metals makes them good electrical conductors? -They have mobile protons. -They have mobile valence electrons. -Their crystal structures can be rearranged easily. -They have mobile cations.
Answers
Answer:
To have a high electrical conductivity, a normal metal should have mobile valence electrons and a long electron mean free path.
Explanation:
A long mean free path means that the electron goes a long distance between scattering events.
The characteristic of metals which makes them good electrical conductors is that they have mobile valence electrons.
What are the characteristics of metals?
An element is the simplest form of matter.Elements are further classified as metal,non -metals and metalloids. Metals possess luster and are malleable that is they can be drawn into thin sheets.They are also ductile and can be drawn into thin wires and are hard due to the strong ionic bonding present in them.
They are good conductors of electricity and heat as they have valence electrons which are mobile and can be easily be displaced if a current is allowed to pass through the metal, thus making it a good conductor.The conductivity of a metal is directly proportional to the number of valence electrons .
Higher the number of valence electrons, greater is the conductivity.Owing to the valence electrons,current can flow through the metal thus making it a good conductor.
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10) A hydrobromic acid (HBr) solution has a molar concentration of 0.0085 M. Calculate the
[H3O+], [OH-] and pH of the solution.
Answers
Answer:
Explanation:
To find the [H3O+] of the solution, we can use the fact that HBr is a strong acid and completely dissociates in water. Therefore, the concentration of H3O+ is equal to the molar concentration of HBr:
[H3O+] = 0.0085 M
To find the [OH-], we can use the equation:
Kw = [H3O+][OH-]
Where Kw is the ion product constant for water, which has a value of 1.0 x 10^-14 at 25°C.
Rearranging the equation to solve for [OH-], we get:
[OH-] = Kw / [H3O+]
[OH-] = (1.0 x 10^-14) / (0.0085)
[OH-] = 1.176 x 10^-12 M
To find the pH of the solution, we can use the equation:
pH = -log[H3O+]
pH = -log(0.0085)
pH = 2.07
Therefore, the [H3O+] of the solution is 0.0085 M, the [OH-] is 1.176 x 10^-12 M, and the pH is 2.07.
The common isotopes of carbon are 12C and 13C. The average mass of carbon is 12.01115 amu. What is the abundance of the 13C isotope? A. 1.115% B. 98.885% C. 0.480% D. 99.52% Provide an explanation if possible. Thanks so much!
Answers
Answer:
The abundance of the 13C isotope is 1.115%
Explanation:
The given information are;
Common isotope of carbon are 12C and 13C
The formula for calculating the relative atomic mass is the observed mass multiplied by the percentage abundance at that mass given as follows;
M₁ X₁ + M₂X₂ = Relative atomic mass
Where:
X₁ + X₂ = 1 as these are percentage represented as fractions
Let M₁ = 12 for 12C and M₂ = 13 for 13C
X₁ = Relative abundance fraction of 12C
X₂ = Relative abundance fraction of 13C
We have;
12X₁ + 13X₂ = 12.01115.......................(1)
X₁ + X₂ = 1............................................(2)
Which gives;
X₁ = 1 - X₂
Substituting the value for X₁ in equation (1) gives;
12(1 - X₂) + 13X₂ = 12.01115
13X₂ - 12X₂ + 12 = 12.01115
X₂ = 12.01115 - 12 = 0.01115
Therefore, the relative abundance fraction of 13C 0.01115 which in percentage is 100 × 0.01115 = 1.115%.
You would expect magnesium to be most similar in properties to
A. silicon.
B. calcium.
C. potassium.
D. sulfur.
Answers
Answer:
Calcium
Explanation:
"Calcium is a mineral that is necessary for life. In addition to building bones and keeping them healthy, calcium enables our blood to clot, our muscles to contract, and our heart to beat. About 99% of the calcium in our bodies is in our bones and teeth. "
Answer:
Calicum
Explanation:
DID THE TEST AND GOT IT RIGHT!!!
Scientists disagree about the possible effects of global warming. Please select the best answer from the choices provided T F this would be appreciated
Answers
Scientific evidence for warming of the climate system is unequivocal.
The current warming trend is of particular significance because most of it is extremely likely (greater than 95 percent probability) to be the result of human activity since the mid-20th century and proceeding at a rate that is unprecedented over decades to millennia.
Earth-orbiting satellites and other technological advances have enabled scientists to see the big picture, collecting many different types of information about our planet and its climate on a global scale. This body of data, collected over many years, reveals the signals of a changing climate.
The heat-trapping nature of carbon dioxide and other gases was demonstrated in the mid-19th century.Their ability to affect the transfer of infrared energy through the atmosphere is the scientific basis of many instruments flown by NASA. There is no question that increased levels of greenhouse gases must cause the Earth to warm in response.
Answer:
this is false
Explanation:
Calculate the number of moles in 25.0 g of each of the
following:
a. He
b. 02
c. Al(OH)3
d. Ga S3
e. C4H10, butane
Answers
Answer:
A. 6.25moles
B. 0.78moles
C. 0.32moles
D. 0.15moles
E. 0.43moles
Explanation:
use
n = mass/molar massA. He
25/4 = 6.25molesB. O2
25/32 = 0.78molesC. Al(OH)3
27+ 3(17) = 7825/78 = 0.32 molesD. GaS3
70+3(32) = 16625/166 = 0.15molesE. C4H10
4(12)+10(1) =5825/58 = 0.43molesAccording to the mole concept, there are 6.25 moles, 0.78 moles,0.32
moles, 0.15 moles, 0.43 moles.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.Number of moles=mass/molar mass
Thus, A. He,25/4 = 6.25 moles,B. O₂,25/32 = 0.78 moles,C. Al(OH)₃,25/78 = 0.32 moles,D. GaS₃,25/166 = 0.15 moles E. C₄H₁₀,25/58 = 0.43 moles.
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Two atoms have the same relative atomic mass but different chemical properties.
Which row about the proton and neutron numbers of these atoms is correct?
Answers
Answer:
A
Explanation:
Protons are the ones which give rise to different elements, hence different elements have different chemical properties. Therefore, the two atoms must have different proton numbers.
The relative atomic mass of an atom is determined by the mass of the neutrons and the protons. The mass of the electrons are not included due to their negligible mass (1/1840).
Hence, due to the different proton masses, the masses of the neutrons will also differ to ensure that both atoms have the same relative atomic mass.
Question 7 of 32
1 Point
What is the purpose of environmental regulations on chemicals?
A. To prevent all chemicals from entering the environment
B. To make the production of chemicals more costly
O C. To only allow the use of chemicals that help the environment
O D. To protect the environment from harmful chemicals
Answers
Answer:O D to protect the environment from harmful chemicals
Explanation:
Which statement describes what is gained or lost during radioactive decay?
Atoms gain other atoms.
Elements take in energy.
Atoms lose smaller particles.
Elements gain smaller particles.
only one answer
Answers
Answer:
The answer is
Atoms gain other atoms
Hope this helps you
Answer:
AAAAAAAAAAAA!!!!!!!
Explanation:
molar mass of c16h19n305s
Answers
Answer:
365.212
Explanation:
According to the given situation, the calculation of molar mass is shown below:-
Data provided
[tex]c_{16}\ h_{19}\ n_3\ o_5\ S[/tex]
Molar mass = 16 × 12 + 19 × 1.008 + 3 × 14 + 5 × 16 + 32.06
= 192 + 19.152 + 42 + 80 + 32.06
Molar mass = 365.212
Therefore for determining the molar mass we simply solve the above equation.
So, the correct answer is 365.212
We learned about three career opportunities in the field of pulp and paper in class. Pick one career and find out the education, training, and experience required for this profession. Write about what you found and explain why this profession might interest you
Answers
Answer:
Pulp and Paper technology is a specialist field of chemical engineering which involves the study of the processes required for the conversion of raw materials such as wood, into pulp and paper products.
Paper and pulp manufacturing is a growing and dynamic industry so it requires a wide variety of personnel - from unskilled and semi-skilled workers to tradesmen, technicians and engineers - to control all the processes and develop new ones.
I choose to be a chemist in the field of paper and pulp. Requirements and compulsory Subjects: Physical Sciences, Mathematics, Engiineering and Technology.
Chemists are responsible for quality control and they study the influence of various chemicals on pulp and paper. Chemical and mechanical engineers develop new production methods.
I'll like to be a chemist in the field of paper and pulp because they perform the major role in the chemical properties of the paper and pulp.
Explanation:
Hope it helps.
Answer:
PLATO ANSWER
Explanation:
For the reaction Pb(NO3)2 + 2KI → Pbl2 + 2KNO3, how many moles of lead iodide are produced from 189.9 g of
potassium iodide?
Select one:
O a. 0.572
Ob. 4.38e4
O c. 1.24
O d. 1.24
PLEASE HELP
Answers
what’s the mass of 2.80 mol of ca
Answers
Answer:
112.22 g
Explanation:
mass = no. of moles x atomic mass
From the periodic table, we can see the atomic mass of Ca is 40.078.
Therefore,
mass = 2.80 x 40.078
= 112.22g (corrected to 2 decimal places.)
Consider preparing ammonia gas by the following reaction:
N2(g) + 3H2(g) ===> 2NH3(g)
If you have 28.02 g of N2 and excess H2, how many grams of NH3(g) can be produced.
6.06g
14.01g
34.08 g
68.16 g
28.02g
Answers
Answer:
34.08g
Explanation:
(Take the atomic mass of N=14.0, H=1.0)
no. of moles = mass / molar mass
no. of moles of N2 used = 28.02 / (14x2)
= 1 mol
Since H2 is in excess and N2 is the limiting reagent, the no. of moles of NH3 produced depends on the no. of moles of N2 used.
From the equation, the mole ratio of N2:NH3 = 1: 2,
which means one mole of N2 produces 2 moles of NH3.
From the ratio, we can deduce the no. of moles of NH3 produced = 1 x 2 =2moles.
Mass = no. of moles x molar mass
Mass of NH3 produced = 2 x (14.0+1.0x3)
= 34g
≈34.08g (this happens because the atomic mass I took is only corrected to 1 decimal place, but in the end, this is only a very small error in the decimals. Make sure you take a look if the question provides the atomic mass:) )
How many moles of Au atoms are present in one ounce of pure gold? [1 oz = 28.4 g]
Answers
Answer:
3.36x10^27 atoms
Explain the difference between the way a molecule (which does not ionize) dissolves and an ionic compound dissolves, using sugar water and salt water as an example
Answers
Answer:
The molecules (which do not ionize) dissolves in water depends on the polarity of molecules while the ionic compounds that dissolve in water depend on the electric charge of the compound.
For example sugar dissolves in water because of the polar nature of sugar which releases energy and form intermolecular bonds with the polar water molecules.
While salt dissolves in water as salt has a net electric charge that attracted by the oppositely charged ions present in the water. The attractive force between salt and water is stronger than sodium and chloride and allow salt to dissolve in the water.