From the dilution formula, the final concentration of the solution is 1.4 %.
What is the final concentration?The final concentration is the concentration at the end of the dilution. We know that dilution is the process by which we add more water to the solution.
Now we have the following;
Initial concentration C1 = 5.4 %
Initial volume V1= 53.5 mL
Final concentration C2= ?
Fina volume V2= 205.0 mL
C1V1 = C2V2
C2 = 5.4 * 53.5/205.0
C2 = 1.4 %
Hence, we have a solution that would have a final concentration of 1.4 %.
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Calculate the concentration (M) of sodium ions in a solution made by diluting 10.0 mL of a 0.774 M solution of sodium sulfide to a total volume of 100 mL.
The concentration of sodium ions in a solution made by diluting 10.0 mL of a 0.774 M solution of sodium sulfide to a volume of 100 mL would be 0.1548 M.
DilutionAccording to the dilution principle, the number of moles of solutes in a solution before and after dilution must be the same. This is expressed as the following equation:
[tex]m_1v_1 = m_2v_2[/tex]
Where [tex]m_1[/tex] is the molarity before dilution, [tex]v_1[/tex] is the volume before dilution, [tex]m_2[/tex] is the molarity after dilution, and [tex]v_2[/tex] is the volume after dilution.
In this case, [tex]m_1[/tex] = 0.774 M, [tex]v_1[/tex] = 10.0 mL, [tex]v_2[/tex] = 100 mL.
[tex]m_2[/tex] = [tex]m_1v_1/v_2[/tex]
= 0.774 x 10/100
= 0.0774 M
Thus, the new concentration of the sodium sulfide solution would be 0.0774 M.
Mole of the final solution: 0.0774 x 0.1 = 0.00774 mol
Sodium sulfide formula = [tex]Na_2S[/tex] ---> [tex]2Na^+ + S^{2-[/tex]
Equivalent mole of sodium ion = 0.00774 x 2
= 0.01548 mol
The concentration of sodium ions = mol/volume
= 0.01548/0.1
= 0.1548 M
In other words, the concentration of the sodium ions in the diluted solution would be 0.1548 M.
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An iron bar at 325k is placed into a sample of water. The iron bar gains energy if the temperature of the water is
The heat will transfer from one object to the other based on the temperature gradient. If the temperature of water is greater than that of the iron bar, the iron bar will gain energy .
What is heat transfer?The heat energy transfer from a hot body to a colder body and which can be interpreted based on the law of conservation of energy. There are three modes of heat transfer namly, conduction, convection and radiation.
Conduction is the energy transfer mode in solids, where the closely packed molecules will transfer heat to the neighbouring molecules in the chain. Convection is taking place in liquids and radiation is for gases.
When a metal of high temperature is dropped into water, the water temperature will rise since heat will transfer from the hot metal to the cold water. If the water has higher temperature than the metal, then the metal will gain energy.
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Which observation is clear evidence that matter is conserved in the chemical
reaction?
Law of conservation of mass gives clear evidence that matter is conserved in the chemical reaction
Experiments in the 1700s by a French chemist named Antoine Lavoisier led to the conclusion of conservation of mass. Lavoisier carefully measured the mass of reactants and products in multiple chemical reactions.
He carried out all the reactions inside a sealed jar. In each and every case, the total mass of the jar and its contents remained the same after the reaction as it was before the reaction took place.
This showed proof that matter was neither created nor destroyed in the reactions. Another outcome of Lavoisier’s research was the discovery of oxygen which was also a remarkable discovery as we all know.
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. For example, the carbon atom in coal becomes carbon dioxide when it is burned into ashes. The carbon atom changes from a solid structure to a gas but its mass remains the same. It does not change at all.
All these observations led to the theory that mass/ matter is conserved in a chemical reaction
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which of the following states of matter are considered fluids
Answer:
the three states of matter are solid liquid and gas so the one that would also have fluids is liquid
A 5.31 g sample of compound that contains only hydrogen and sulfur was combusted, and yielded 10.0 g of SO₂ and 2.81 g of H₂O. The molar mass of the compound is 68 g/mol. What is this compound's molecular formula?
The molecular formula of the compound, given that it contains only hydrogen and sulfur is H₄S₂
Hoow do I determine the molecular formula?We'll begin by obtaining the mass of sulfur and hydrogen. This is illustrated below:
Mass of SO₂ = 10 gMolar mass of SO₂ = 64 g/mol Molar of S = 32 g/mol Mass of S =?Mass of S = (32 / 64) × 10
Mass of S = 5 g
Mass of compound = 5.31 gMass of S = 5 gMass of H = ?Mass of H = (mass of compound) – (mass of S)
Mass of H = 5.31 – 5
Mass of H = 0.31 g
Next, we shall determine the empirical formula
H = 0.31 gS = 5 gEmpirical formula =?Divide by their molar mass
H = 0.31 / 1 = 0.31
S = 5 / 32 = 0.156
Divide by the smallest
H = 0.31 / 0.156 = 2
S = 0.156 / 0.156 = 1
Thus, the empirical formula is H₂S
Finally, we shall determine the molecular formula. Details below
Empirical formula = H₂SMolar mass of compound = 68 g/molMolecular formula =?Molecular formula = empirical × n = mass number
[H₂S]n = 68
[(2×1) + 32]n = 68
34n = 68
Divide both sides by 34
n = 68 / 34
n = 2
Molecular formula = [H₂S]n
Molecular formula = [H₂S]₂
Molecular formula = H₄S₂
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Need help!!!!
H3C-CH-CH3
CH₂ CH3
1. The branched alkane contain 4 carbon in the parent chain and 1 substituent group
2. The branched alkane 10 carbon parent chain and 1 substituent group
A branched chain alkane or branched alkane is an alkane which has alkyl group bonded to its central carbon chain and branched alkane contain only carbon and hydrogen atom and with carbon connected to other carbon by single bond and the longest continuous chain of carbon atom is the parent chain and if there is no longest chain because two or more chain are the same longest length then the parent chain defined as the one with most branches and the substituent atom or group of atom substituent in place of hydrogen atom on the parent chain of hydrocarbon that's why here in the first picture the the branched alkane contain 4 carbon in the parent chain and 1 substituent group and in the second picture the branched alkane 10 carbon parent chain and 1 substituent group
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Do the benefits of using nuclear energy outweigh the risks?
Make a claim. Support your claim with evidence from the article. Then, explain why the evidence supports your claim.
Yes, the benefits of using nuclear energy outweigh the risks as nuclear energy has help to solve electricity issues in the United states and other countries.
Are there any advantages to using nuclear power?The benefits of nuclear energy is that it is one of the cleanest forms of energy. Its carbon footprint is also among the smallest. It is among the solutions to the energy gap. It is crucial to how we respond to greenhouse gas emissions and climate change.
Note that A clean energy source with no emissions is nuclear. It produces energy by fission, which is the splitting of uranium atoms to release energy. With no toxic byproducts created from fossil fuels, the heat from fission is used to create steam that powers a turbine and produces electricity.
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how can saltwater batteries work in real life?
Answer:
the answer is that you should prove it
For each determine whether its crystal structure is FCC, BCC, or simple cubic and then justify your determination.
If the structure of the crystal contains an identical component at the center of the cube then it is said to be BCC whereas if there are parts in the center of each face along with those at the corners of the cube, then it is FCC.
How do you identify the structure of a crystal?Crystal structures may be narrated in several ways. The most usual manner is to refer to the size and shape of the cube and the locations of the atoms (or ions) within the cell. The crystal structure is set on by X-ray diffraction. A beam of X-rays strikes the crystal and the diffraction design is then used to study the structure, Matter can broadly be restricted into two categories based on its internal structure i.e. amorphous and crystalline. The morphology of crystals can be studied with the unaided eye in large well-evolve crystals and has been historically examined.
So we can conclude that the size of the unit cell and the positioning of atoms in a crystal may be set on from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
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You have 0.54 moles of NH3 and excess O3. How many moles of O3 are required?
The number of moles of O₃ required to react with 0.54 mole of NH₃ is 0.36 mole
How do I determine the mole of O₃ required?First, let us let us consider the balanced equation, to obtain usefull information as regarding the question.
6NH₃ + 4O₃ -> 3N₂O + 9H₂O
From the balanced equation above,
6 moles of NH₃ reacted with 4 moles of O₃
With the information obtained from the balanced equation, we can succefully determine the number of mole of O₃ required to react with 0.54 mole of NH₃. Details below
From the balanced equation above,
6 moles of NH₃ reacted with 4 moles of O₃
Therefore,
0.54 moles of NH₃ will react with = (0.54 × 4) / 6 = 0.36 mole of O₃
Therefore, we can conclude that the number of mole of O₃ required is 0.36 mole
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4. A 55 kg sled is sliding down a hill. At the 7 m mark, it has a velocity of 1.8 m/s. What is
the mechanical energy of the system?
Answer:
89.1Joule Because when Multiply The Half Of Mass With The Square of Velocity we Get We Get Eighty nine Point One
Consider these two entries from a fictional table of standard reduction potentials.
X3++3e−⟶X(s)o=−1.75 V
Y3++3e−⟶Y(s)o=−0.50 V
What is the standard potential of a galvanic (voltaic) cell where X is the anode and Y is the cathode?
ocell=
The standard electrode potential of the voltaic cell is 1.25 V.
What is the cell potential?We know that a cell is composed of the anode and the cathode. Current would always enter in via the abode and then leave via the cathode. In any case, there is a metallic conductor that would always acts as a conduit for the electrons to pass through.
In this case, we can see the the cathode and the anode. The cathode is the part of the cell that gains electrons and is reduced while the anode is the part of the cell that is oxidized and there is a loss of electron there.
Now the cell potential can be obtained from;
standard potential = electrode potential of the cathode- Electrode potential of the anode
The standard potential = (-0.50) - (−1.75)
= 1.25 V
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Name the intermolecular forces that exist between Br₂ and CCI4.
The intermolecular forces that exist between Br₂ and CCI₄ is dispersion force and London dispersion force
Intermolecular forces that arises between the positive components of one molecule and the negative components of another molecule and in the Br₂ there is London dispersion force because this is the diatomic element are nonpolar and nonpolar molecules are only capable temporary dipoles and the intermolecular forces between CCI₄ is the London dispersion force of attraction which is also known as induced dipole induced dipole and it is referred to as induced dipole because it is an attraction between temporary dipole in the structure
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at stp, o2(g) and o3(g) are two forms of the same element that have
At STP, O2(g) and O3(g) are two forms of the same element that have option 1: different molecular structures and different properties
Do o2 and o3 differ in any ways?Due to the release of heat during its breakdown into oxygen, ozone is less thermodynamically stable than oxygen. Ozone is made up of three oxygen molecules, making it in an unstable state. In order to become stable, ozone gives up one of its oxygen molecules in order to return to its diatomic state.
Therefore, Ozone (O2) and ozone (O3) both include oxygen atoms, but they differ in terms of their physical and chemical characteristics. Ozone has a strong, pungent odor, whereas oxygen is odorless. While oxygen liquefies at a much lower temperature than ozone, at -112 degrees Celsius, ozone does so.
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See full question below
At STP, oxygen exists in two forms, O2(g) and O3(g). These two forms of oxygen have 1. different molecular structures and different properties 2. different molecular structures and the same properties 3. the same molecular structure and different properties 4. the same molecular structure and the same properties
2. How does island biogeography decrease ecological tolerance?
Which bone makes up the base and lower portion of the skull?
Answer:
The ethmoid, sphenoid, occipital, paired frontal, and paired temporal bones are the 5 bones that make up the base of the skull. Three areas of the skull base—the anterior, middle, and posterior cranial fossae—can be distinguished.
a bowl of rice cools is that conduction convection or radiation?
Answer: It is conduction.
Explanation: Heat travels through solid substance by the process of conduction. By conduction heat from the fire heats up the pot and reaches the rice grains at bottom.
Propane gas plus oxygen gas produces
Answer:
Explanation:
As a result, the reaction of propane (C H) 3 8 and oxygen should produce carbon dioxide, water, and heat as products, and the balanced chemical equation will be: C H3 8 + 5O2 3CO2 + 4H O2 + heat. Reactants have the next highest potential power level when compared to materials.
Answer:
water and carbon dioxide
Explanation:
Propane undergoes combustion reactions in a similar fashion to other alkanes. In the presence of excess oxygen, propane burns to form water and carbon dioxide.
I hope this helps!
C3H8O2
empirical Or molecular
formula formula
Answer: i think its empirical
Explanation:
How many atoms of phosphorus are in 2.50 mol of copper(II) phosphate?
Explanation:
2.50 × 2/ 1
the answer is
5 moles
Question 18 (1 point)
What is the pH of a buffer that is 0.086 M HF and 0.386 M LiF? The K₂ for HF is 3.5
x 10-4.
Your Answer:
Answer
The pH of a buffer that is 0.086 M HF and 0.386 M LiF when the K₂ for HF is 3.5x 10-4 is 2.802
The pH of a buffer solution is given by Henderson Hasselback equation.
pH=pKa+log[A-]/[HA]
Substituting the values, we get
pH=-log(3.5x10^-4)+log(0.086/0.386)
pH=-log(3.5x10^-4)-0.653
pH=3.455-0.653
pH=2.802
pH is the potenz of hydronium ion.It tells the acidic strength of a compound.Buffer solution resists the change in pH on the addition of weak acid or base and conjugate of weak acid or base.It is used in acid-base chemistry.Buffer solutions are used for keeping the pH at a constant value.To learn more about buffer solutions visit:
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The state of matter of a substance at a given temperature is determined by the relationship between ________________.
Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules. The state of matter of a substance at a given temperature is determined by the relationship between molecules.
What is intermolecular forces of attraction?
Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.
At a given temperature, the state of any matter can be defined on the basis of presence of forces of attraction between the molecules of the matter.
Thus, the state of matter of a substance at a given temperature is determined by the relationship between molecules.
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¿What is silicic anhydride?
¿What is silicic anhydride?
Silicon dioxide is a delicate, rough and light material. act as a substance thickener and free circulation.
In the cosmetic and cleaning industry, it allows the production of laundry soaps and all kinds of detergents. Incorporated into the paste for teeth, and combined with calcium carbonate, helps us remove plaque or tartar dental safely.
It is also used in the manufacture of glass, ceramics and cement. It is used in manufacture of sandpaper and blocks. As a catalytic converter, it acts in all acid production processes sulfuric. It is also used as a sharpener for the manufacture of discs, inks of printing, adhesives and polyester resins. Finally, it is used in the production of sand for cats.
What is the empirical formula of Cl₂06?
The empirical formula for Cl₂O₆ is ClO₃.
The empirical formula of any chemical compound is the atoms ratio present in the formula to simplest whole number. it is the simplest formula of any chemical compound.
the given molecular formula is :
Cl₂O₆ : by dividing the both the subscripts to 2 , to get simplest whole number. we get :
empirical formula : ClO₃
The molecular formula is Cl₂O₆. the molecular formula of any chemical formula is the representation of atom in the chemical equation with subscript to indicate number of atoms in the molecule.
Thus, The empirical formula for Cl₂O₆ is ClO₃.
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iron hydroxide decomposes to form iron oxide and water vapor. If 0.500 g of iron hydroxide are decomposed what mass of water vapor will be produced
The mass of water vapor that will be produced when iron hydroxide decomposes to form iron oxide and water vapor is 0.126 grams.
How to calculate mass?The mass of a substance can be calculated stoichiometrically. Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
According to this question, iron hydroxide decomposes to form iron oxide and water vapor. If 0.500 g of iron hydroxide are decomposed, the mass of water vapor produced can be calculated as follows;
2Fe(OH)₃ → Fe₂O₃ + 3H₂O
Based on the above equation, 2 moles of iron hydroxide decomposes into 3 moles of water vapor.
moles = 0.5g ÷ 106.87 g/mol = 0.00468mol of iron hydroxide.
0.00468 × 1.5 = 0.00701moles of water vapor.
mass of water vapor = 0.00701 moles × 18g/mol = 0.126g
Therefore, 0.126 grams of water vapor will be produced from 0.500 grams of iron hydroxide.
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One way to measure temperature in some applications is to monitor the gas pressure in a rigid, closed container. What is the final temperature (in °C) of such a vessel, calibrated to initially read 1.00 atm at 0.00 °C, if the pressure changes to 1.25 atm?
How do i start this?
The temperature of a vessel is 296.43 Kelvin when pressure reads 1.250 atm.
What is temperature?Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness.
At standard temperature and pressure, when pressure is 1.000 atm the value of temperature is 273,15 K.
If the pressure at temperature T changes to 1.250 atm
p1 = 1. 000 atm
T1 = 298.15 k
P2 = 1.250
T2 = ?
We apply Gay-Lussacs law
Using P1/ T1 = P2 /T2 all at constant volume
T2 = 296.43 K.
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Why does atomic radius increase down a group (group 13)
Answer:
As we go down in groups in periodic table , number of shells increases than that in the previous group which tends to increase the size of atom eventually increasing the atomic radius.
Explanation:
For group 13:
Boron has 2 shells
Aluminum has 3 shells
Gallium has 4 shells
Indium has 5 shells and
Thallium has 6 shells.
Simple!
So the size goes on increasing down the group!
This bohr model is showing what element
If an aerosol can contained 350 mL of CFC gas at a pressure of 5.7 atm, what volume would this gas occupy at 1.0 atm ?
Answer:
2.0 L
Explanation:
P1= first pressure
P2= second pressure
V1= first volume
V2= second volume
P1V1 = P2V2=
(5.7 atm)(350 mL) = (1.0atm)V2
V2= (5.7 atm)(350 mL) / (1.0 atm)=
V2= 1.99500 L = 2.0 L
Which of the following subject areas contains questions that can be answered by science?
a
Astrology
b
Nature
c
Philosophy
d
Spirituality
Nature contains questions that can be answered by science.
The correct option is B).
What is nature?
The word nature refers to the things we can see with our eyes generally they include: plants, animals, the landscape, and other features and products of the earth, as opposed to humans or human creations.
The science of nature helps us to understand how the world and the universe around us work.
There are five major branches of the Science of Nature:
.Chemistry
.Astronomy
.Earth science
.Physics
.Biology.
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Answer
A. Astrology
Explanation:
The rest isnt science its just like puedoscience so its A.