hpo42− is the conjugate _____ of h2po−4 and the conjugate _____ of po43− . view available hint(s) for part c acid / acid acid / base base / acid base / base

Answer:

Kinetic Energy

Explanation:

Temperature is a measure of the average kinetic energy of the particles in a substance. And also Kinetic Energy has 2 words.

The scientist I have chosen is J.J. Thomson, who made significant contributions to the study of atomic structure in the late 19th and early 20th centuries.

Thomson's most well-known contribution is his discovery of the electron, which he identified as a negatively charged particle present in all atoms. This discovery formed the basis of Thomson's "plum pudding" model of the atom, which proposed that atoms consisted of a positively charged "pudding" with negatively charged electrons scattered throughout.

While this model was eventually disproven, Thomson's discovery of the electron and his work on the measurement of atomic and molecular masses laid the foundation for the modern atomic model. Specifically, Thomson's work on mass spectrometry led to the development of more advanced techniques for determining the masses and properties of atoms and molecules, which are still used in modern research today.

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Answer:

they are only efficient in certain areas

Explanation:

Wind turbine are efficient only in certain areas it is a problem with using wind turbines to produce energy.

Wind turbine convert the wind energy into the electricity. It is a power generating device that converts the kinetic energy in to electrical energy.

Now lets check all option one by one:

Option (A): Wind turbines are efficient only in certain areas it is a problem with using wind turbines to produce energy because the flow of air from areas of high pressure towards the lower pressure.

So, it is correct option.

Option (B): Wind turbines occupy a lot of space to work.

So, it is incorrect option.

Option (C): Wind turbines produce a large amount of energy is not a problem.

So, it is incorrect option.

Option (D): Wind turbines does not create a pollution or it does not pollute the air or water.

So, it is incorrect option.

Thus, we can say that Wind turbines are efficient only in certain areas it is a problem with using wind turbines to produce energy because the flow of air from areas of high pressure towards the lower pressure.

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The statement the particles have no set ratio for how to combine, and they can be separated by physical means describes a mixture.

Physical means like filtration, evaporation, and sublimation can all be used to separate mixtures. There is no chemical reaction that takes place. As a result, it can be physically detached because it is still theoretically divided into its constituent parts.

Hence, we can conclude that option D is the answer.

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Answer:

The balanced reaction for the decomposition of baking soda is

2 NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)

We can find the heat of reaction by using the Hess' Law. This is done by using this formula:

∑(Hf,products) -∑(Hf,reactants) = Heat of reaction

where Hf is the heat of formation. According to literature, these are the heats of formation for each of the compounds in the reaction:

NaHCO3: -947.68 kJ/mol

Na2CO3: -1130.94 kJ/mol

CO2: -393.51 kJ/mol

H2O: -241.8 kJ/mol

Applying Hess' Law:

[1(-1130.94) + 1(-241.82)] + 1(-393.51)] - [2(-947.68)] = 129.09 kJ

Thus, the heat of reaction is 129.09 kJ/mol NaHCO3. Since there is 1.96 mol of NaHCO3, the total heat of reaction is 253.02 kJ

Explanation:

please mark me as brainlest

Answer:

Pic attached of structures

Explanation:

a) Propanal       (R-CHO; Carbonyl grp structure)

b) Dimethyl ether or methoxymethane     (R-O-R)

Answer:

0.531 mol Al(OH)3

If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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The molarity of a solution prepared by dissolving 3.11 grams of NaOH in

enough water to make 300 milliliters of solution is 0. 256 mol/ L

Explanation:

Molarity (M) is the amount of a substance in a given volume of solution. It is otherwise known as the number of moles of solute in a certain amount of solution.

The unit of molarity is mol/L

Molarity = number of moles of solute divided by the volume of the solution\

Molarity = ?

Number of  moles is calculated using :

Mass of the solute = 3.11 grams of NaOH

Molar mass of the solute = Na + O + H

Let's input the atomic numbers of the elements: Na (23) , O (16) , H (1)

Molar mass of NaOH = 23 + 16 + 1 = 40 g/ mol

Number of moles = 3.11 ÷ 40 = 0.077 mol

Volume of the solution is measured in Liters

Let's convert 300 milliters to liters = 300 divided by 1000 = 0.3 Liters

Molarity = 0.077 ÷ 0.3 = 0. 256 mol/ L

Therefore, the Molarity of the solution is 0. 256 mol/ L

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Answer:

B

Explanation:

cool air never rises so not A

C would mean its getting warmer

and heat flows from warm to cool so not D

we are left with B

if my anwser helps please mark as brainliest.

the correct answer is dissapate...but it is

not here so i think relativly the answer is destroy

Answer:

D.CH2

Explanation:

A-P-E-X

The intermolecular force primarily responsible for the difference in boiling point between acetone and isopropanol is hydrogen bonding.

Acetone and isopropanol both have intermolecular forces called van der Waals forces, but isopropanol also has an additional intermolecular force called hydrogen bonding.
Hydrogen bonding is a special type of dipole-dipole interaction that occurs when a hydrogen atom is bonded to a highly electronegative atom (such as oxygen or nitrogen) and is attracted to another electronegative atom in a different molecule. In isopropanol, the hydrogen atoms bonded to the oxygen atom can form hydrogen bonds with other isopropanol molecules.
These hydrogen bonds are stronger than the van der Waals forces present in acetone, which only has dipole-dipole interactions. The stronger hydrogen bonding in isopropanol requires more energy to break the intermolecular attractions and transition from a liquid to a gas, resulting in a higher boiling point compared to acetone.

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Answer:

To name an ionic compound, you simply need to find the names  of the cation and anion present in the compound and make sure to revise the ends of metal names as needed. First, write out the name of the metal, followed by the name of the non-metal with its new ending.

Explanation:

Write the name of the cation, and then write the name of the anion, changing the ending to "-ide" if it's a single element and leaving it as it is if it's a polyatomic ion.

The pH of the buffer solution is 3.95. This means that the buffer is slightly acidic, which is expected since the pKa of acetic acid is below 7.0.

To predict the pH of the buffer solution, we need to use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

Where:

pH = the pH of the buffer solution

pKa = the dissociation constant of the weak acid (acetic acid)

[A-] = the concentration of the conjugate base (acetate ion)

[HA] = the concentration of the weak acid (acetic acid)

First, we need to calculate the concentrations of the weak acid and the conjugate base:

[HA] = (2.00 M) * (5.00 mL / 50.0 mL) = 0.200 M

[A-] = (2.05 g / 82.03 g/mol) / (50.0 mL / 1000 mL) = 0.0410 M

Next, we need to calculate the pKa of acetic acid, which is 4.76.

Finally, we can plug the values into the Henderson-Hasselbalch equation:

pH = 4.76 + log(0.0410 / 0.200)

pH = 4.76 - 0.812

pH = 3.95

Therefore, the pH of the buffer solution is 3.95. This means that the buffer is slightly acidic, which is expected since the pKa of acetic acid is below 7.0. The buffer can resist changes in pH when small amounts of acid or base are added to it.

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Answer:

u can eaisly do this just make sure u empty the filter and let dry to prevent mold

Explanation:

Answer:

Digestive

Explanation:

When comparing a copper cylinder and a wooden cylinder, the method of comparison that gives more useful results is dimensional analysis.

This method involves analyzing the dimensions of the two objects, such as their size, shape, and weight. The dimensions of an object can provide valuable insights into its properties, such as its strength, durability, and heat conductivity. For example, when comparing a copper cylinder and a wooden cylinder, the copper cylinder will likely have a greater density than the wooden cylinder due to its higher mass.

This means that the copper cylinder will be stronger and more durable than the wooden cylinder, making it a better choice for applications that require strength and durability. The dimensions of the two cylinders can also provide insights into their thermal conductivity. Copper is known for its excellent thermal conductivity, making it a good choice for heat sinks and other applications where thermal management is important. In contrast, wood is a poor thermal conductor, making it a poor choice for such applications.

Therefore, by using dimensional analysis, we can compare the properties of the two cylinders and determine which one is best suited for a particular application.

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The evidence that refutes the statement is: 4 EVIDENCE: Scientists have observed galaxies are moving away from us.

According to the observations made by astronomers, galaxies in the universe are not only moving away from each other, but they are also moving away from us.

This phenomenon is known as the expansion of the universe, and it contradicts the idea that all matter and energy in the universe was initially concentrated in a tiny corner of space during the time of the big bang and has since filled up the entire universe.

The observation that galaxies are moving away from us suggests that the universe is expanding in all directions. This expansion implies that the universe was not initially confined to a specific location but rather underwent a rapid expansion from a highly dense and hot state.

Therefore, the idea that all matter and energy in the universe was initially concentrated in a small corner of space and then expanded to fill up the whole universe is inaccurate based on the evidence of the observed expansion of galaxies. Evidence 4

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Answer:

1×10^-14 mol^2dm^-6

Explanation:

Ionic product is defined as the product of the concentrations of ions, each raised to the power specified by its stoichiometric coefficient in a solution. The product of concentrations of H+ and OH- ions in water at a particular temperature is known as ionic product of water. The value of Kw increases with the increase of temperature, i.e., the concentration of H+ and OH- ions increases with increase in temperature. The value of Kw at 25°C is 1 x 10-14.

At any given time, the amount of hydrogen ions and hydroxide ions present in water is extremely small and consequently the concentration of undissociated water molecules is almost unchanged by any minute ionization thus it is considered a constant. The product of the concentration of both hydrogen and hydroxide ions is a constant referred to as the ionic product for water.

There are 20.8 moles of propanol

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

1.2 x 10⁵ molecules of propanol

\(\tt \dfrac{1.25\times 10^{25}}{6.02\times 10^{23}}=20.8~moles\)

Answer:

i dont undersstand lol

Explanation:

Explanation:

bhag bhag aaya sheer

..........

Answer:

D

Explanation:

A uniform cube is subjected to volume expansion. Each side gets decreased by 1%, then the bulk strain is 0.03.

Volume is the space occupied by a three-dimensional object.

Given that, the side cube is l, then

volume V = l³

\(\dfrac{\Delta V}{V} = \dfrac{3D1}{1}\)

For change in volume

% Change in volume = 3× % change in length

= 3 × 1%

Hence, bulk strain = 0.03.



Thus, the bulk strain is 0.03.

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Answer:

we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass

mC=8Ac=8*12=96g

mH=10AH=10*1=10g

mN=4AN=4*14=56g

mO=2AO=2*16=32g

by adding the masses together we find the molar mass of the molecule

M=mC+nH+mN+mO=96+10+56+32=194g/mole

we apply the rule of threes to find the percentage of each element

194g..96gC..10gH...56gN....32gO

100g....a...........b...........c.............d

a=(100*96)/194=49.48%C

b=(100*10)/194=5.19%H

c=(100*56)/194=28.85%N

d=(100*32)/194=16.48%O

Explanation:

In 1854, Cyrus West Field conceived the idea of the telegraph cable and secured a charter to lay a well-insulated line across the floor of the Atlantic Ocean. Obtaining the aid of British and American naval ships, he made four unsuccessful attempts, beginning in 1857.

Answer:The solar energy that we receive through solar radiation is directly or indirectly responsible for aspects as important to life as: Photosynthesis in plants; maintaining a planet temperature compatible with life. of the wind. The solar energy that reaches the earth's surface is 10,000 times greater than the energy currently consumed by all

Explanation:

Answer: the longest a virus that can be kept on a plastic bag is a few hours to a couple of days.

Explanation: hope that helped!(:

Specific heat capacity is 139 J/kgC and molar heat capacity is 221 J/C/mol.

To calculate the specific heat capacity we will be using the equation
Q = mC∆T
Where Q = energy added or lost
m = the mass of the substancec = the specific heat of the substance
∆T is the difference in temperature usually written as T2-T1
Given Q=585Jm = 125.6 grams or 0.1256 kg

Where should find c =?
T2 =53.5°CT1 = 20 °C585 = 0.1256x C x(53.5–20)585 =4.2076xC585/4.2076
=139J/kg°C = C
Now,
Using the equation c_m = C/n

Where c_m = molar heat capacity
C = specific heat capacity
n = number of moles in kgc_m = 139/0.628
= 221 J/°C/mol

Therefore, specific heat capacity is 139 J/kgC and molar heat capacity is 221 J/C/mol.

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Answer:

Oxidized

Explanation:

Oxidation and reduction are terms used to describe reactions in which  electrons move from one atom or molecule to another atom or molecule. Oxidation occurs when electrons are lost, while reduction occurs when electrons are gained. (The charge is reduced).  The two processes are linked, whenever one substance is oxidized another has to be reduced.