Answer:
1.2M
Explanation:
Initial Volume 0.05L
Final Volume 0.250L
HCl Molar mass: 36.46 g/mol
M = 6M HCl
Molarity = mol solute / L of solution
Inital M = Molarity = 6
mol solute = X = unknown
L of Solution = 0.05L
6 = X / 0.05
X = 0.3
X = 0.3/0.25
X = 1.2 M
can a substance be a lewis acid without being a bronsted-lowry acid?argue
Answer:
Yes
Explanation:
Yes, A substance can be a lewis acid without being a Bronsted-Lowery acid because there are some substances which cannot donate protons(Bronsted-Lowery acid) but can accept a pair of electron.
For Example:
Let us take the example of BF₃
BF₃ contains no proton so it is not a Bronsted Lowery Acid
However, BF₃ has an incomplete octet with 6 electrons. It needs an electron pair to complete its octet. It accepts a pair of electron to become a Lewis Acid
Answer:
Interesting question, and the answer is yes, a substance can be a Lewis acid but not a Bronsted-Lowrey acid. To see this, let’s take a look at the definitions of each.
Explanation:
Bronsted-Lowrey acid:
A compound that is a hydrogen ion (proton) donor. When dissolved in the solvent in question, these compounds lose a proton to the solution. The concentration of these protons in solution is referred to as acidity, and is measured on the pH scale.
Lewis acid:
A substance that is an electron pair receiver. In solution, free electron pairs will form bonds with the substance, either ionic or covalent. In this definition, a proton is itself an acid, rather than a part of an acid.
A key thing to note here is that, in the Bronsted-Lowrey definition, there must be a proton. That means, all Bronsted-Lowrey acids are of the form HXn→H++Xn− , showing the dissociation in solution. However, a Lewis acid needs only to have the ability to accept an electron pair, which means that H+ is a Lewis acid, instead of what makes a compound an acid. Additionally, that means that the number of compounds that qualify as a Lewis acid are expanded. A favorite example of mine is boron trifluoride, or BF3 . It is a common reagent in organic synthesis, it is a Lewis acid, but does not have any hydrogen, so it cannot be a Bronsted-Lowrey acid
The reaction 2 NO(g) ⇌ N2(g) + O2(g) has a value of Keq = 2400 at a temperature of 2000 K. If 0.570 mol of NO(g) is initially placed in a 3.0 L container, calculate the equilibrium concentrations of each gas
Answer:
[tex][N_2]_{eq}=0.094M[/tex]
[tex][O_2]_{eq}=0.094M[/tex]
[tex][NO]_{eq}=0.002M[/tex]
Explanation:
Hello,
In this case, for the given chemical reaction, we write the following law of mass action:
[tex]Keq=\frac{[N_2][O_2]}{[NO]^2}[/tex]
That in terms of the change [tex]x[/tex] due to the reaction extent (ICE procedure) we can write:
[tex]Keq=\frac{x*x}{([NO]_0-2x)^2}[/tex]
Thus, the initial concentration of nitrogen monoxide is:
[tex][NO]_0=\frac{0.570mol}{3.0L} =0.19M[/tex]
Thereby, we write:
[tex]2400=\frac{x*x}{(0.19-2x)^2}[/tex]
That we can solve by suing the quadratic equation formula or solver to obtain two roots:
[tex]x_1=0.094M\\x_2=0.096M[/tex]
Nevertheless, the correct answer is 0.094 M since the other root will produce a negative concentration of nitrogen monoxide at equilibrium, therefore, the equilibrium concentrations turn out:
[tex][N_2]_{eq}=x=0.094M[/tex]
[tex][O_2]_{eq}=x=0.094M[/tex]
[tex][NO]_{eq}=0.19M-2x=0.19M-2(0.094M)=0.002M[/tex]
Best regards.
What is the frequency of radiation emitted by a photon of light if the energy released during its transition to ground state is 3.611 × 10-15 joules? (Planck's constant is 6.626 × 10-34 joule seconds)
Answer:
5.449 x 10¹⁸ Hz
Explanation:
Energy (E) =Frequency (F) x Plancks constant (h)
F= 3.611x10⁻¹⁵J / 6.626 x 10⁻³⁴ Js⁻¹
F =5.449 x10¹⁸ s⁻¹ or 5.449 x 10¹⁸ Hz
Which set of phrases best lists the characteristics of asexual reproduction?
one parent, offspring are not identical to the parent
one parent, offspring are identical to the parent
two parents, offspring are not identical to the parents
two parents, offspring are identical to the parents
I need this answer fast ASAP.
Answer:
one parent, offspring are identical to the parent
Explanation:
Answer:
one parent, offspring are identical to the parent
Explanation:
asexual reproduction is a form of reproduction that does not require two gametes to fuse. Asexual reproduction results in offspring that are known as stable clones, meaning that their genetic makeup is stable and doesn't change between generations
Why does the structure of the plasma membrane make this type of transport necessary for fluids
Answer: because the phospholipid bilayer formed by these interactions makes a good barrier between the interior and exterior of the cell, because water and other polar or charged substances cannot easily cross the hydrophobic core of the membrane.
Explanation:
At STP how many moles of
argon gas are present in 6.5
liters of argon gas
Answer:
0.289 molIn order to determine the number of moles of the given volume of Ar, divide the given volume by the molar volume of an ideal gas,
22.710 L/mol
Explanation:
So you have a volume of 6 .5
6.5L / 22.710 L/mol
L is eliminate .
6.5/ 22.710 L/mol = 0.286 mol
Using the older STP values of 0 ∘ C or 273.15 K , and pressure of 1 atm , molar volume is 22.414 L/mol .
6.5L /22.414 L/mol .= 0.289 mol
The melting point of three solids X,Y and Z are 298K, 314 K and 398K respictively.Arrange these in increasing order of their inter particle force of attraction
Answer:
Explanation:
The higher the melting point of a substance, then the higher the force of attraction. Which means there is direct relationship between the melting point and force of attraction.
The increasing order of interparticle force of attraction of the the three particles are
Z(398) Y(314) X (298)
I.e Particle " Z " have highest melting point, follows by particle "Y" follows by particle "X
NOTE: The melting point of a substance refers to the
temperature whereby there there is a change from solid state to liquid state, it is dependent on the pressure of the system
Given the formula representing a compound: What is the IUPAC name of this compound?
Answer:
2,2- dichloro-heptane
Explanation:
The IUPAC name of the compound is 2,2-dichloro-heptane
Which of these pulls denser rocks towards Earth's center?
1.thermal energy
2.gravity
3.radiation
Answer:
Gravity pulls denser rocks down toward Earth's center. This causes less dense rocks and magma to move upward toward the surface.
Answer:
Gravity boo
Explanation:
which of these methods could are used to separate an insoluble solid and soluble solid
Answer:
To separate an insoluble solid from a soluble solid: Mixing the mixture with water, filtering out the insoluble solid, and then evaporating the water to isolate the soluble solid.
Explanation:
Answer:
Mixing the mixture with water, filtering out the insoluble solid, and then evaporating the water to isolate the soluble solid
Which one is NOT an acid?
A. H2S04 B. H2NO3 C. HCI D. NaOH
Twenty liters of NO gas react with excess oxygen. How many liters of NO2 gas are produced if the NO gas reacts completely?
Answer:
2O L
Explanation:
The balanced chemical equation is 2NO+O
2
→2NO
2
Thus, 2 moles of NO will produce 2 moles of NO
2
.
Also, the volume is directly proportional to the number of moles.
Therefore, 20 L of NO will produce 20×
2
2
=20 L of NO
2
How do greenhouse gases such as CO2 and N2O contribute to an increase in Earth’s atmospheric temperature?
A.
Greenhouse gases interact with infrared photons and reflect them back to Earth’s surface.
B.
Greenhouse gases chemically react with one another, releasing heat in the process.
C.
Greenhouse gases agitate visible light photons, increasing the photons’ temperature and motion energy.
D.
Greenhouse gases generate internal heat through radioactive decay, similar to the core of Earth.
Answer:
The answer is A
Explanation:
The earth naturally maintains the heat energy balance by absorbing a sufficient amount of sunlight energy by the terrestrial land and then reverting back the excess sunlight energy back to the space. The increase in abundance of greenhouse gases in the atmosphere results in absorption of sunlight energy which contains infrared photons this is responsible for increasing the global temperature levels hence, responsible for global warming. These infrared photons are reflected to the earth surface instead of sending back to the space. This is responsible for disturbing the heat balance.
Greenhouse gases interact with infrared photons and reflect them back to earth’s surface, hence option A is correct.
How does greenhouse gases rise in earth’s atmosphere?The burning of fossil fuels, logging of forests, and raising of livestock all have a rising impact on the climate and temperature of the planet.
This increases the greenhouse effect and causes global warming by adding a significant amount of greenhouse gases to those that are already present in the atmosphere.
The earth naturally maintains the balance of heat energy by receiving enough solar energy through the terrestrial land and then returning any excess energy to space.
Therefore, greenhouse gases such as CO₂ and N₂O interact with infrared photons and reflect them back to earth’s surface.
Learn more about greenhouse gases, here:
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There are ___________ forces of attraction between particles in the gas state. Use the following word bank to help you.
Answer:
Different
Explanation:
Level 3- How is tooth decay related to pH?How can it be prevented?
Answer:
A lower pH of the mouth creates bad bacteria that eventually lead to decay of the tooth.
It can be prevented by avoiding food that causes acidity.
Explanation:
Tooth decay is caused by the pH level in the mouth dropping below 5.5, meaning it is acidic. It can be prevented by brushing your teeth as toothpaste is an alkali which will neutralise the pH level in your mouth.
Hope this helps
When electrons are removed from the outermost shell of a calcium atom, the atom becomes
A)an anion that has a larger radius than the atom.
B) an anion that has a smaller radius than the atom.
C)a cation that has a larger radius than the atom.
D) a cation that has a smaller radius than the atom.
Answer:
A cation that has a smaller radius than the atom.
Explanation: when electrons are removed from the outermost shell of a calcium atom, the atom becomes a cation that has a smaller radius than the atom.
When electrons are removed from the outermost shell of a calcium atom, the atom becomes a cation that has a smaller radius than the atom. Therefore, the correct option is option D.
What is atom?Atom, the smallest unit of matter that may be separated without releasing electrically charged particles. It is also the smallest unit of matter with the characteristics of a chemical element. As a result, the atom is indeed the fundamental building component of chemistry.
The majority of the atom comprises empty space. The rest of the structure is made up of a positive-charged nucleus of neutrons and protons surrounding by a cloud of electrons with negative charges. In comparison to electrons, the lightest energized particles in nature, the nuclei is small and dense. When electrons are removed from the outermost shell of a calcium atom, the atom becomes a cation that has a smaller radius than the atom.
Therefore, the correct option is option D.
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Distillation is a _____________ separation technique.
chemical
physical
Answer:
Chemical
Explanation:
Because it's being done by chemical means
Napisz równania reakcji chemicznych w formie cząsteczkowej, jonowej i jonowej skróconej. Podkreśl wzory soli trudno rozpuszczalnych i podaj ich nazwy.
palmitynian potasu + chlorek magnezu
zapis cząsteczkowy reakcji...………………..
zapis jonowy...…………………….
zapis jonowy skrócony...……………….
nazwa soli trudno rozpuszczalnej...……………..
oleinian sodu + azotan (V) wapnia
zapis cząsteczkowy reakcji...………………..
zapis jonowy...…………………….
zapis jonowy skrócony...……………….
nazwa soli trudno rozpuszczalnej...……………..
Answer:idioma equivocado ????
Explanation:
C2H5OH(l)+CH3COOH(l) → CH3COOC2H5(l)+H2O(l) If the yield of ethyl ethanoate obtained when 20.00 g of ethanol is reacted with excess ethanoic acid is 30.27 g, calculate the percentage yield
Answer:
The percentage yield is 79.12%
Explanation:
The first thing we need to calculate here is the theoretical yield of ethyl ethanoate that can be obtained from 20g of ethanol.
Since the mole ratio is 1:1, then this is quite straightforward.
What we need to obtain at first here is the number of theoretical moles of ethanol reacting.
That would be mass of ethanol/molar mass of ethanol
Molar mass of ethanol is 46g/mol
Thus the number of moles is 20/46 = 0.4348 mole
Like it is indicated earlier, since the number of moles are equal from the balanced equation, it also means that 0.4348 mole of ethylethanoate is produced
Now, we need to know the mass of ethyl ethanoate produced
The mass can be calculated by multiplying the number of moles by the molar mass
The molar mass of ethyl ethanoate is 88g/mol
So the mass of it produced = 0.4348 * 88 = 38.2624 or let’s just say 38.26
Thus, the percentage yield will be;
Actual yield/Theoretical yield * 100%
From the question, our actual yield is 30.27g while our calculated theoretical yield is 38.26g
= 30.27/38.26 * 100% = 79.12%
What is the definition of a scientific theory
A) A method of learning that emphasizes reason as the way to understand the world.
B) A brief statement that summarizes past observations and predicts future ones.
C) A model that explains the underlying reasons for observations and laws.
D) The equivalent of a scientific opinion which others may disagree with.
E) None of these.
Answer:
The correct answer to the following question will be Option C.
Explanation:
The theory seems to be the context within which findings are explained as well as possible predictions are made. This theoretical perspective discusses the factors behind the results as well as the laws.Theories have been used in scientific knowledge to give wide interpretations to accommodate observed facts in case the root reason is still yet to be found as well as characterized.So that Option C will be the right answer.
to the
of the substances.
DONE
Answer
what do you mean?
Explanation:
im confused
Answer:
Sorry. I don't understand
Explanation:
Question 11
A solution cannot dissolve any more solute even though only a small amount of solute has
been added to the solvent. This solution is
1. saturated and concentrated
2. unsaturated and dilute
3. saturated and dilute
4. unsaturated and concentrated
Answer:
Explanation:
B.) Saturated
A saturated solution is when the maximum amount of solute that could be dissolved in that solvent volume at that temperature and pressure has been dissolved, adding more solute beyond this point would lead to the additional solute not dissolving in the solvent. When the maximum solute concentration in the solution that can be dissolved has been reached the solution is said to be saturated.
Hope This Helps??
to well
Which of the
of the following is a way to use
water economically
a construction of bewris
b Rainwater harvesting
c Drup irrigation
d Infitration
Answer:
c Drup irrigation
Explanation:
Hope it helps you.
Plz mark as brainliest plz.
What is a chemical solution and what are the names of its components?
Answer:
A chemical solution is defined as a homogeneous mixture of two or more substances. There are two components of chemical solution that include solute and solvent.
Solute is the component that get dissolved in another substance and solvent is the substance that dissolve solute.
For example: carbon dioxide in water. Where carbon-dioxide is solute and water is solvent.
what is the difference between an exothermic and endothermic reaction.
Answer:
An endothermic reaction takes in heat, but feels cold to the touch. An exothermic reaction gives off heat and feels warm to the touch because it is heating the outside objects.
Please answer number 5 ASAP
Answer: Hello mister i dont now your question
Explanation:
Builders and dentists must store plaster of Paris,
CaSO4 x 1/2 H2O, in airtight containers to prevent it from
absorbing water vapor from the air and changing to
gypsum, CaSO4 x 2H2O How many liters of water
vapor evolve when 2.00 kg of gypsum are heated at
110°C to produce plaster of Paris? At 110°C, the
density of water vapor is 0.574 g/L.
In order to determine the amount of water that evaporates from we need to convert the mass into volume.
What temperate is required to produce the POP ?The builders and the density use the plaster of Paris called POP and are a CaSO4 x 1/2 H2O is used for the airtight containers to stop them from taking in water vapors from the air and changes into gypsum that is CaSO4 x 2H2O. The answer is given as below. Answer:
The plaster of Paris is used for coating the walls and the celling from the aspects of molding. Its also used for casting decorative elements.
It absorbs water from the air and vapor evolves when the 2.00 kg of gypsum is heated at 110 degrees. C.
Find out more information about the Builders and dentists.
brainly.com/question/14644606.
Which statement accurately describes the movement of Earth’s plates due to convection currents?
Answer:
Volcanic eruptions.
a. 24.5 g of ammonia NH3 = how many moles of ammonia?
.b How many molecules of ammonia is that from 22.a.?
The forces between water molecules are stronger
than the forces between ethanol molecules. Which
liquid would probably be most difficult for an insect
to walk on? Explain your answer.
Answer:
An insect would have an easier time walking on the surface of water than on the surface of ethanol.
Water's stronger intermolecular forces lead to higher surface tension.
Higher surface tension allows water to support the insect.
Answer:
An insect would have an easier time walking on the surface of water than on the surface of ethanol.
Water's stronger intermolecular forces lead to higher surface tension.
Higher surface tension allows water to support the insect.
Explanation:
