What is the relationship between the density of the air molecules and the air pressure?
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1.  the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.  the final concentration of KOH after adding 550 mL of water to 125 mL of 3.01 M KOH solution is approximately 0.557 M.

1.) If 125 mL of water is added to 45.3 mL of a 0.71 M NaOH solution, the resulting solution will be a diluted NaOH solution. The addition of water will increase the total volume while reducing the concentration of NaOH. To determine the final concentration of NaOH, we need to consider the conservation of moles.

First, let's calculate the moles of NaOH in the initial solution:

moles of NaOH = volume (in L) × concentration (in M)

moles of NaOH = 0.0453 L × 0.71 M = 0.0321433 moles

After adding 125 mL (0.125 L) of water, the total volume of the solution becomes 0.0453 L + 0.125 L = 0.1703 L.

To find the final concentration, we divide the moles of NaOH by the total volume:

final concentration of NaOH = moles of NaOH / total volume

final concentration of NaOH = 0.0321433 moles / 0.1703 L ≈ 0.189 M

Therefore, the final concentration of NaOH after adding 125 mL of water to 45.3 mL of 0.71 M NaOH solution is approximately 0.189 M.

2.) If 550 mL of water is added to 125 mL of a 3.01 M KOH solution, the resulting solution will also be a diluted solution. Again, we will apply the conservation of moles to determine the final concentration of KOH.

First, calculate the moles of KOH in the initial solution:

moles of KOH = volume (in L) × concentration (in M)

moles of KOH = 0.125 L × 3.01 M = 0.37625 moles

After adding 550 mL (0.55 L) of water, the total volume of the solution becomes 0.125 L + 0.55 L = 0.675 L.

To find the final concentration, divide the moles of KOH by the total volume:

final concentration of KOH = moles of KOH / total volume

final concentration of KOH = 0.37625 moles / 0.675 L ≈ 0.557 M

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Answer:

I'm terribly sorry but the download is not working for me! All it says is Download pdf, and when I click it, It does nothing except for refreshing the page!

Explanation:

In miles per hour, the speed of light (which is 300,000 km/s), is equal to 67,10,70,000 miles/hr.

Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that is perceived by the human eye

Given the speed of light in kilometers per second (km/s) -

300,000 km/s.

To convert the speed from kilometers per second (km/s) to miles per hour (miles/hr), we should know the relationship between 1 km/s and 1 mile/hr. The light moves at 300,000 km/s.

Now -

In 1 km/s = 2,236.9 miles/hr

Therefore -

in 300,000 km/s = 300,000 km/s x 2236.9 = 67,10,70,000 miles/hr.

Therefore, in miles per hour, the speed of light (which is 300,000 km/s), is equal to 67,10,70,000 miles/hr.

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[The question asked might not be understandable to other students. The question can be written as -

The light moves at 300,000 km/s. Calculates its speed in m/h]

The name of this compound using IUPAC rules is  3,4-dimethylhexane.

Option D is correct.

the IUPAC nomenclature of organic chemistry is described as a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry.

Option A, 2,3-diethylbutane, is incorrect because it has a different carbon chain length and different substituent positions.

Option B, 2-ethyl-3-methylpentane, is incorrect because it has a different carbon chain length and one of the substituents is incorrectly placed.

Option C, 3-methyl-4-ethylpentane, is incorrect because it has a different carbon chain length and the substituent positions are reversed.

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Answer:

≈32°C

Explanation:

1) the rule:

\(\frac{pV}{T}=const;\)

2) according to the rule above the final temperature can be calculated as:

\(t_{final}=\frac{p_{init}}{p_{final}}*t_{init}; \ = > \ t_{final}=\frac{100}{300}*95=32.\)

According to the Gay-Lussac's law, as volume is constant the temperature must be decreased to 31.6°C.

Gay-Lussac's law is defined as a gas law which states that the pressure which is exerted by the gas directly varies with its temperature and at a constant volume.The law was proposed by Joseph Gay-Lussac in the year 1808.

The pressure of the gas at constant volume reduces constantly as it is cooled till it undergoes condensation .The law is given by the formula, V₁/T₁=V₂/T₂, which on substitution gives T₂=95×100/300=31.6 °C.The container in Gay-Lussac's law is considered to be rigid  in contrast to the container present in Charle's law.

Thus, as per  Gay-Lussac's law, as volume is constant the temperature must be decreased to 31.6°C.

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The amount of heat required to raise the temperature of 125.0 g of aluminum by 12°C is 1611 joules.

Temperature = 12°C

Mass = 125.0 g

To estimate the amount of heat required, we need to use the formula:

Q = m * c * ΔT

Q = the amount of heat in joules

m = the mass of the substance in kilograms

c = the specific heat capacity of the substance

ΔT = the change in temperature in degrees

The specific heat capacity of aluminum = 0.897 J/g°C.

Q = 125.0 g * 0.897 J/g°C * 12°C

Q = 1611 J

Therefore, we can conclude that the amount of heat required is 1611 J.

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The answer is stoichiometric coefficient.

The stoichiometric coefficient is the number written in front of atoms, ions, and molecules in a chemical reaction to balance the number of elements.

What is stoichiometric coefficient?

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Answer:

The average mass of all the isotopes.

Option B.

Explanation:

Have a great rest of your day.

Answer:

The digestive system is very important to animal health. Without the digestive system earth might still be lifeless other than bacteria and what not. The digestive system is a system to keep us full and energized. It allows us to chew and swallow our food and let it break down in our belly acid. Then it departs our body through the large, small intestines to then be flushed out to sea.

~ LadyBrain

Explanation:

an organ that is part of the

digestive system his digestive system is extremely simple

The composition of a given pure compound is always the same no matter what the source of the compound.

A compound seems to be a substance that is entirely made of one kind of molecule.

Every component of compounds shares the same traits and features because of their homogenous makeup. However, because mixtures are composed of several sorts of chemicals, they frequently differ in terms of content, qualities, and samples.

Therefore, the composition of a given pure compound is always the same no matter what the source of the compound.

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The mass of \(Ag_2CrO_4\) that would be formed will be 2.69 grams.

Mole of 2.5 grams silver nitrate = 2.5/143.32 = 0.017 mol

Mole of 18.0 mL, 0.450 M sodium chromate = 18/1000 x 0.450 = 0.0081

From the balanced equation of the reaction, the mole ratio of silver nitrate to sodium chromate is 2:1. In other words, the sodium chromate is a bit limiting.

The mole ratio of sodium chromate and  \(Ag_2CrO_4\) is 1:1. Hence, the equivalent mole of \(Ag_2CrO_4\) formed would also be 0.0081 mol.

Mass of 0.0081 mol \(Ag_2CrO_4\) = 0.0081 x 331.73

                                                 = 2.69 grams

In other words, the mass of \(Ag_2CrO_4\) formed from the reaction would be 2.68 grams.

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Answer: In simplest case mass of reactants is same as mass of products.

Without thinking this question deeper, mass of ZnCl2 would be 49, but..

Explanation: Reaction should be  Zn + 2 HCl ⇒ ZnCl2 + H2

Amount of zinc is  5 g / 65,38 g/mol = 0,076476 mol and amount

of Hydrogen Chloride is 50 g / 36.458 g/mol = 1,371 mol.

Althought HCl is needed 0.152 moles, zinc is an limiting reactant.

So it is possible to produce only 0.076476 mol Hydrogen and its mass

is 0.154 g.  Mass of ZnCl2 would be 0.076476 mol · (65.38 + 2·35.45) =

 10.42 g

Answer:

n = 2.1 mol

Explanation:

Given data:

Number of moles of gas = ?

Volume of gas = 56.3 L

Pressure of gas = 0.899 atm

Temperature of gas = 20°C (20+273 = 293 k)

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

0.899 atm × 56.3 L  = n × 0.0821 atm.L/ mol.K  × 293 k

50.614 atm.L = n × 24.055 atm.L/ mol

n = 50.614 atm.L / 24.055 atm.L/ mol

n = 2.1 mol

Correct number to balance the equation: ___KClO3 → 2KCl 3O2 is "2".

We obtain KCl and oxygen gas from the breakdown of potassium chlorate (KClO3).

1.5 moles of O2 gas and one mole of KCl are produced from one mole of KClO3.

Therefore, the response will be:

KCL)3 - - > KCL + 3/2 O2

The entire equation will be multiplied by two in order to transform the fractional coefficient to a whole number.

2X [ KCLO3 - - > KCL + 3/2 O2 ]

A balanced equation will therefore be:

2KCLO3 - - > 2KCL + 3 O2

KClO3's coefficient is therefore "2".

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The cation of an ionic compound affects the appearance of the solution by determining the color of the solution.

An ionic compound is formed when an element that has fewer electrons loses them to another element that needs more electrons, forming an ionic bond between them. Ionic bonds are formed between oppositely charged ions. The positively charged ion is referred to as the cation while the negatively charged ion is referred to as the anion.

In an aqueous solution, the presence of a cation is an essential factor that influences the color of the solution. The concentration and identity of cations determine the color of the solution. For example, the presence of a sodium cation will make the solution turn yellow. The color of the solution changes if another cation replaces the sodium cation. The presence of another cation like copper(II) will cause the solution to turn blue.

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Answer: The layer closest to Earth, the Troposphere, is MORE dense than any other layer.

Explanation: The troposphere is the densest atmospheric layer, compressed by the weight of the rest of the atmosphere above it.

The layer closest to Earth, the Troposphere, is MORE dense than any other layer. This statement is True.

It is pressure exerted by the weight of the atmosphere at sea level. its value is 101,325 Pascal which we call it as 1 atmospheric pressure expressed as 1 atm. i.e. 1 atm = 101,325 N/m². Like water has pressure when we go long inside the water, our atmosphere has also pressure from top to surface of the earth. There are different layers of atmosphere from bottom to top which are Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere. Each layer has its own range and weight. When we are on the surface of the earth, all layers of atmosphere will apply pressure. but when we increase altitude(height), the number layers reduces and its weight too. Hence as altitude increases, air pressure decreases.

Density is directly related to the atmospheric pressure.

Gases in the air is mainly due to animal beings, trees and gases releases from factories and other technologies. All this thigs are on the surface of the earth which is troposphere. animal beings take oxygen and releases carbon dioxide and trees do opposite the gases mainly accumulate on the troposphere. because of gravitational force it does not go far in the atmosphere it remains in troposphere hence it is dense region of the atmosphere. Concentration of gas decreases as altitude increases. Hence exosphere is region of lowest density.

Hence only option A True.

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The [OH-] of the 0.025 M weak acid solution will be equal to the pKA of the acid, 4.615.
What is weak acid solution?
A weak acid solution is a solution that contains an acid that is not completely ionized in water. Weak acids, such as acetic acid, have pH values between 4.5 and 6.0. These acids are not strong enough to completely break apart in water, leaving some of the molecules still intact. Because of this, weak acids form molecules that can react with other molecules, such as bases, in solution.
This is because the equilibrium of the acid dissociation reaction is reached with the same concentration of acid and its conjugate base in solution. The [H3O] will be equal to 0.025 M, as the acid is in dissociation equilibrium with its conjugate base. The pH of the solution can be calculated by taking the negative log of the [H3O], which will be 1.59. The pOH can be calculated by taking the negative log of the [OH-], which will be 4.615.
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Electron and proton attract each other.

Two electrons will repel each other.

An electron is a negatively charged subatomic particle that can be either sure to an atom or free (no longer certain). An electron this is certain to an atom is one of the three primary varieties of particles inside the atom -- the other  are protons and neutrons. collectively, electrons, protons and neutrons shape an atom's nucleus.

A proton is a subatomic particle observed inside the nucleus of each atom. The particle has a positive electric price, same and opposite to that of the electron. If remoted, a single proton could have a mass of best 1.673 ? 10-27 kilogram, simply barely much less than the mass of a neutron.

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Evidence for a chemical reaction typically includes the production of bubbles, color change, and temperature change. However, phase change, which refers to a change in the physical state of matter, is not necessarily an indicator of a chemical reaction.

For example, water can undergo a phase change from a liquid to a gas without undergoing a chemical reaction. Therefore, phase change alone is not sufficient evidence for a chemical reaction. It is important to note that the presence of one or more of the other indicators (color change, temperature change, or production of bubbles) does not necessarily guarantee a chemical reaction has occurred either. Other factors must also be considered, such as the presence of reactants and products, and changes in chemical composition.

The evidence for a chemical reaction includes several factors, but not all options listed are indicative of a chemical reaction. Among the given options, phase change, color change, temperature change, and production of bubbles, the one that is not always evidence for a chemical reaction is a phase change.

Phase changes are more commonly associated with physical changes, such as melting or evaporating, rather than chemical reactions. On the other hand, color changes, temperature changes, and the production of bubbles (gas evolution) are more indicative of chemical reactions, as they often involve the formation of new substances or the release of energy.

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Answer:

Deposition

Explanation:

Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.

Answer:

The microbiome is defined as the collective genomes of the microbes (composed of bacteria, bacteriophage, fungi, protozoa and viruses) that live inside and on the human body. We have about 10 times as many microbial cells as human cells.

Explanation:

Hope this helps

Answer:

Instead of normal protium atoms, heavy water consists of two deuterium atoms. Like normal water, heavy water is an odorless liquid at room temperature. Moreover, deuterium, tantamount to protium, is also a stable isotope. This ensures that heavy water is not radioactive

Answer:

 a supply of electric charges which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges.

Explanation:

There's your answer have a good day

ANSWER

The mass of water is 0.0536 kg

STEP-BY-STEP EXPLANATION;

Given information

The mass of KNO3 = 175g

The molarity of the solution = 32.25 M

The molality formula is given below as

The first step is to find the mole of the solute using the below formula

Recall, the molar mass of KNO3 is 101.1032 g/mol

The second step is to find the mass of water using the molality formula

Hence, the mass of water is 0.0536 kg

Answer:

11.67 lbs

Explanation:

The yield of Cu(OH)2 is equal to the amount of CuCl2 used.

Yield is a quantitative measure of the amount of product obtained from a reaction. It is usually expressed as a percentage of the theoretical yield, which is the maximum amount of product that could be obtained from the given amounts of reaction components. Yield is an important concept in chemistry because it provides a means for evaluating the efficiency of the reaction, the quality of the conditions and the effectiveness of the purification process. Yield can be determined by measuring the amount of product obtained following a reaction, then dividing that amount by the theoretical yield. This calculation provides an estimate of how much of the desired product was obtained from the reaction.

The yield of Cu(OH)2 using CuCl2 is determined by the mole ratio of the two reactants. The balanced equation for the reaction is:
CuCl2 + 2NaOH → Cu(OH)2 + 2NaCl
The mole ratio of CuCl2 to Cu(OH)2 is 1:1, so for every mole of CuCl2 used, one mole of Cu(OH)2 is produced. Therefore, the yield of Cu(OH)2 is equal to the amount of CuCl2 used.

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Answer:

Astatine: Halogen

Nitrogen: Non-Metal

Krypton: Non-Metal, Noble Gas

Chlorine: Non-Metal

Sulfur: Non-metal

Explanation:

Solution :

We know, In an electrolyte solution, the number of dissolved particles is larger because the solute breaks apart into ions. The greater the number of ions, the larger the impact on colligative properties will be.

So, the compound which will dissociate into more number of electrolyte has more vapour pressure.

Out of all given compound K₃PO₄ have highest number of particles after dissociation.

Hence, D) is the required solution.

Answer:

108g/mol

Explanation:

Equation: 4Al + 3O2 ----> 2Al2O3

Ratios. : 4. : 3. : 2

4 moles of Al give 2 moles of Al2O3

4*27g of Al gives 2*102g of Al2O3

108g of Al gives 204g of Al2O3

54g of Al will give = (54*204)/108g of Al2O3

Ans:108g/mol

Answer:

Explanation:

P = 2.35g

Cl= 0.539 g

% MASS = mass of  X/ mass of a compound

 % mass of P =   2.35 / (2.35+ 0.539) =  81.34%

  % mass of Cl =  0.539 /(2.35+ 0.539) =  18.66 %

Answer:

what the person above me said

Explanation: