For a series of weak acids, the increase in pKa means that the conjugate bases become more stable.
What is pKa?The term pKa refers to the negative logarithm of the acid dissociation constant. This is a constant that shows the extent to which an acid is dissociated in solution.
As the pKa of a series of weak acids increases, the conjugate bases become more stable.
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60 points! please help me! will appreciate it!
Answer:
[tex]\huge\boxed{\sf 49.41\ L}[/tex]
Explanation:
In the reaction:
for every 3 moles of H₂, 2 moles of NH₃ are produced.
Converting 25 g of Ammonia into moles:
Moles = mass / molar mass
= 25 / (14 + 1 × 3)
= 25 / (14 + 3)
= 25 / 17
= 1.47 mol
From the reaction:
2 NH₃ = 3 H₂
1 NH₃ = 3/2 H₂
1 NH₃ = 1.5 H₂
1.47 mol of NH₃ = 1.5 × 1.47 mol of H₂
1.47 mol of NH₃ = 2.2 mol of H₂
So, 2.2 mol of H₂ are needed to produce 1.47 mol (25 g) of NH₃
Converting 2.2 mol of H₂ into L:
= mole × molar value
[molar value = 22.4 L/mol]
= 2.2 × 22.4
= 49.41 L
[tex]\rule[224]{225}{2}[/tex]
What trend does electronegativity follow, going down the periodic table?
A. Electronegativity increases because there are more total electrons
in the atom.
B. Electronegativity increases because there are more valence
electrons in the atom.
C. Electronegativity decreases because the valence electrons are
farther from the nucleus.
D. Electronegativity decreases because the size of the nucleus is
bigger.
Electronegativity decreases because the valence electrons are farther from the nucleus. Hence, option C is correct.
What is electronegativity?Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons toward itself.
From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.
Important exceptions to the above rules include the noble gases, lanthanides, and actinides.
Electronegativity decreases because the valence electrons are farther from the nucleus. Hence, option C is correct.
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The electronic configuration of an element is given below.
Element 1: 1s22s22p4
Which statement about the reactivity of the element is true?
It is reactive because it has to gain an electron to have a full outermost energy level.
It is unreactive because it has to lose an electron to have a full outermost energy level.
It is reactive because it has to gain two electrons to have a full outermost energy level.
It is unreactive because it has to gain two electrons to have a full outermost energy level.
Please Help. Will Mark Brainliest
Answer:
It is reactive because it has to gain an electron to have a full outermost energy level.
Explanation:
The electron configuration of oxygen is 1s2,2s2 2p4.
Oxygen is in group six in the periodic table so it has six electrons in its valence shell. This means that it needs to gain two electrons to obey the octet rule and have a full outer shell of electrons (eight).
Suggest two reasons for the change in the carbon dioxide percentage from 1900 to 2015.
Answer: 43
Explanation:
This is a Chemical bond where two atoms are sharing 1 or more electrons among the separate elements of a compound
O Covalent Bond
O lonic Bond
O Ambient Bond
O Metallic Bond
Answer:
Covalent bond
URGENT
What do electrochemical cells use to generate electricity?
Question 1 options:
Flow of protons
Flow of neutrons
Flow of electrons
Flow of particles
Answer:
flow of electrons between the electrolytes and the electrodes
If you had a jar of cream and shook it up does the jar weigh the same
TRUE or FALSE. Write I If the statement is TRUE, write F if the statement is
FALSE on the space provided before the number.
1. A mixture is always made up of a combination of elements
2. A mixture is not a chemical combining of substances
3. In a mixture, the substances lose their identities
4. The substances involved in a mixture cannot be separated by a simple physi
process
5. Salt and water can be separated through distillation
6. Water for drinking can only be obtained from seawater by distillation
7. The distillation of miscible liquids is only possible if the liquids have differ
boiling points.
8. Mixtures have fixed melting and boiling points.
9. Paper chromatography is a physical method for separating mixtures
10. Crude oil is broken down by heat, vaporized, and allowed to condense
various liquids such as gasoline. This process is called distillation
A car with a mass of 900 kg accelerates at 45 m/s 2 squared. What is the force acting on the car?
Answer:
mass (m) = 900 kg, acceleration (a) = 32 m/s^2. using f=m*a, f = 900 * 32 = 28 800 newtons. power (watts)= (f * s)/t say accelerating for 1 second from rest, s= (a*t^2)/2 = 16 meters.
3 things to say when your girlfriend is sad?
Answer:
don't be sad you have a nice peach
babe you got that wap
don't be sad go get a tattoo
Answer:
Netflix and chill | do you need d!c rn ? | spoil her
Explanation:
3. What enables electrons to move from NADH or FADH2 to complex I, to the other complexes, to molecular oxygen
It's too short. Write at least 20 characters to explain it well.
Your answer can't be empty
How many grams are in 7.50 moles of Hg?
Answer:
0.03738970038
Explanation:
7.50 x 0.0049852933845157 = 0.03738970038
Is the car moving backwards between D and F? Explain your answer.
Answer:
No
Explanation:
This is velocity time graph .
See the change between D and E(F is not given).
The graph goes up means velocity is up If it is going back then the velocity should be on negative side i.e beneath 0.What is Aurora Borealis?
Auroras present in polar regions.
Answer:
the Northern Lights
Explanation:
The northern lights, one of several astronomical phenomena called polar lights (aurora polaris), are shafts or curtains of colored light visible on occasion in the night sky. Aurora borealis
hope this helps
how many moles are represented in 11.5 grams of sodium?
Answer:
In 11.5 g of sodium, there are 0.5 moles.
Explanation:
The atomic masses of two isotopes of Zinc are 64 and 66. If Zinc has 27 electrons, what is the number of protons and neutrons in each isotope?
Zinc-64 : Number of protons __________ Number of neutrons ______________
Zinc-66 : Number of protons __________ Number of neutrons ______________
Answer:
Zinc-64: Number of protons is 30. Number of neutrons 34.
Zinc-66: Number of protons is 30. Number of neutrons 36.
Explanation:
The atomic number of Zinc is 30, so in every Zinc atom, regardless of whether it's an isotope or not, will always have 30 protons.
The atomic number of an equivalent to the number of protons, and never changes.
The isotope number is the sum of the protons and neutrons in the nucleus.
Isotope number = atomic number + neutrons
So if we have 30 protons, and we're trying to find the number of neutrons in Zinc-64 we just subtract 30 from 64.
64 - 30 = 34
So now we know that there are 34 neutrons in Zinc-64
Same thing goes for Zinc-66.
66 - 30 = 36
There are 36 neutrons in Zinc-66.
Hope that's helpful!
The bond line formula,
represents the molecular formula
C₂ H18
C₂H15
yes this is the right question
What is the last step in the process of getting a bill passed into law under normal circumstances
The anser is by making the bill have tall the things that a normal bill has. the invisiable line in the middle. the invisible ben franklin and the 50
WILL GIVE BRAINLIEST. IF YOU DO LEAVE AN ANSWER, PLEASE EXPLAIN.
Answer:
it should be C
Explanation:
the top guy is right
When food is exposed to air, it can lose electrons. This loss of electrons
creates reactive molecules that work to destroy the chemical bonds in the
food, causing it to spoil. What are these reactive molecules called? A. Hydrogen molecules
B. Free radicals
C. Oxygen molecules
D. Spoiling molecules
It is Free radicals
Answer:
Its Free Radicals
Explanation:
You're Welcome
Which conclusion do the graphs support?
Phosphorus is required for the growth of the phytoplankton.
Phosphorus is required for the growth of the phytoplankton.
Phytoplankton cannot withstand high levels of phosphorus present in the estuary.
Phytoplankton cannot withstand high levels of phosphorus present in the estuary.
Phosphorus harms the growth of phytoplankton in the estuary.
Phosphorus harms the growth of phytoplankton in the estuary.
Phytoplankton growth does not depend on the amount of phosphorus.
Phytoplankton growth does not depend on the amount of phosphorus.
Answer:
Phosphorus is required for the growth of the phytoplankton.
Explanation:
How is the energy transformation in a bouncing ball similar to those of a pendulum
Answer:
Similar to the movement of a pendulum, an enormous wrecking ball when held at a height possesses potential energy, and as it falls, its potential energy is converted to kinetic energy. As the wrecking ball makes contact with the structure to be destroyed, it transfers that energy to flatten or take down the structure.
Explanation:
I hope this helps :)
A scuba diving tank at a pressure of 180 atmospheres contains a mixture of three gases: oxygen, helium, and nitrogen. The partial pressures of the oxygen and helium are 81 atmospheres and 58 atmospheres, respectively. What is the partial pressure of nitrogen in the tank?
Considering the Dalton's partial pressure, the partial pressure of nitrogen in the tank is 41 atm.
Dalton's partial pressureThe pressure exerted by a particular gas in a mixture is known as its partial pressure.
So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
[tex]P_{T} =P_{1} +P_{2} +P_{3} + ... +P_{n}[/tex]
where n is the amount of gases present in the mixture.
This relationship is due to the assumption that there are no attractive forces between the gases.
In summary, the total pressure in a mixture of gases is equal to the sum of partial pressures of each gas.
Partial pressure of nitrogenIn this case, the total pressure of the gas mixture is calculated as:
[tex]P_{T} =P_{oxygen} +P_{helium} +P_{nitrogen}[/tex]
You know that:
[tex]P_{T} = 180 atm[/tex][tex]P_{oxygen} = 81 atm[/tex][tex]P_{helium} = 58 atm[/tex][tex]P_{nitrogen}= ?[/tex]Replacing in the expression for the total pressure:
[tex]180 atm=81 atm+58 atm+P_{nitrogen}[/tex]
Solving:
180 atm -81 atm -58 atm= [tex]P_{nitrogen}[/tex]
41 atm= [tex]P_{nitrogen}[/tex]
Finally, the partial pressure of nitrogen in the tank is 41 atm.
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Can someone help me with this?
1. F
2. E
3. G
4. A
5. C
6. D
7. B
Copper metal (cu) reacts with silver nitrate (agno3) in aqueous solution to form ag and cu(no3)2. the balanced chemical equation is shown below. cu 2agno3 right arrow. cu(no3)2 2ag the molar mass of cu is 63.5 g/mol. the molar mass of ag is 107.9 g/mol. what mass, in grams, of ag is produced from a reaction of 31.75 g of cu? 26.95 grams 107.9 grams 215.91 grams 431.82 grams
The mass of produced silver from the reaction is 107.9 grams.
How we calculate mass from moles?Mass of any substance will be calulated by using the moles of that substance as:
n = W/M, where
W = required mass
M = molar mass
Givem chemical reaction is:
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
Moles of 31.75g of Cu = 31.75g / 63.5g/mol = 0.5 mole
From the stoichiometry of the reaction, it is clear that:
1 mole of Cu = produced 2 moles of Ag
0.5 mole of Cu = produced 2×0.5=1 mole of Ag
Now we calculate the mass of Ag from given moles as:
W = 1mol × 107.9g/mol = 107.9g
Hence correct option is (2).
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How does the titration curve of a diprotic acid differ from that of a monoprotic acid?.
We have that how the titration curve of a diprotic acid differs from that of a monoprotic acid is that monoprotic acid will only have 1 equivalent point, while the diprotic acid will have 2 equivalent points.
What is differnce betwwen monoprotic acid and diprotic acid?Generally, the equation for the monoprotic acid is mathematically given as
HA>>><<H+ + A-
While
the equation for the diprotic acid is
H2 A>>><<H+ + HA-
HA- >>><<H+ + A2-
In conclusion, The monoprotic acid will only have 1 equivalent point, while the diprotic acid will have 2 equivalent points
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What is the main advantage of a compact
fluorescent light bulb?
Answer:
The advantages of compact fluorescents are they are energy efficient, compact in size, have good lumen maintenance, long life, endless shapes and sizes, dimmable, easy retrofit, low operating cost, and radiate less heat.
Explanation:
Please help me!!!!!!!!! i'll mark you B
Answer:
11) time
9) a projectile
5) Greater than vx
13)
What’s the answers ???
Answer:
1.potential
2. Kinetic
3. Potential
4. I think is potential because it is storing the energy but if is a crank flashlight it is kinetic.
Explanation:
What is the speed of light in a vacuum? What would happen to this speed as it enters a different medium?
Answer:
the speed and wavelength of light are reduced , although the frequency remains unaltered.
The speed of light on the vacuum is equal to 3 ×10⁸m/s. The speed of light changes as it enters a different medium due to refraction.
What is refraction?Refraction of light can be described as the redirection of a light ray traveling from one optical medium to another optical medium. The redirection is caused by a change in speed with a change in the medium. Refraction of light can be described as an observed phenomenon, but sound waves and water also experience refraction.
Refraction follows Snell's law, which can be described as the ratio of the sines of the angle of incidence and angle of refraction should be equal to the ratio of the refractive indices of the two different mediums.
When light travels from a less dense to a denser medium, then the refracted ray bends towards the normal. The angle of incidence of the light ray will be greater than the angle of refraction.
If a light ray travels from a denser to a rarer medium, then it will bend away from the normal and the angle of incidence will be less than the angle of refraction.
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