Calculate the pH of the solution that results from each of the following mixtures. Part A 160.0mL of 0.25M HF with 220.0mL of 0.31M NaF Express your answer using two decimal places. Part B 185.0mL of 0.12M C2H5NH2 with 285.0mL of 0.22M C2H5NH3Cl Express your answer using two decimal places.

Answer:

Conduction: Heat traveling through a solid material. On hot days, heat is conducted into your home through the roof, walls, and windows.

Explanation:

That's a quick answer from gooogle, i hope this helps you :D

Answer:

Heat transfers through solid materials via conduction. The roof, walls, and windows of your house all carry heat on hot days.

Explanation:

The correct pairing from the following possibilities is CH2CH2OCH2CH3, reacts with acid to form an ammonium salt.

The measured pseudo-first-order rate constants (k) and their dependence on salt concentrations Here, we plot the rate constants as a function of cation (ammonium or sodium) concentration rather than the overall ionic strength because we observe that ammonium ion concentration better correlates with changes in the observed rate constants.

Decarboxylation of OAA occurs slowly in pure water, and we remeasured the rate of this process in control experiments. The change in the absorbance spectrum over time can We determined the uncatalyzed rate constant for the decarboxylation to be (5.24 ± 0.95) × 10−5 s−1 as an average and standard deviation of two measurements, which shows good agreement with previous work (5.5 × 10−5 s−1).20.

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Transform something quickly: Using the molecular mass finder and the number of moles of CuSO4, 1 mole of Copper(II) sulphate equals 159.6086 gram.

1 mole in grams, how much?

Theoretically, the Carbon-12 atom has this atomic mass   As a result, a mole of carbon is exactly equivalent to a gram of carbon, or its atomic mass or weight (12 grams). It is known as a 1 molecular (1M) solution when a substance is dissolved in 1 liter of liquid (1mol/L), a 0.5 molecular (0.5M) solution when it is dissolved in 2 liters of liquid (0.5mol/L), and so on.

What is 1 mole's molarity?

A solution that contains 1 mole of a substance dissolved in a volume of 1 litre is known as a 1 molar solution. For instance: One mole (or one gram) of table salt (NaCl) has a molecular weight of 58.44, making 58.44g the molecular mass of one gram. The number of molecules per liter, denoted by the unit signature mol/L or mol/dm3 for SI units, is the most often used unit denoting molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.

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Answer:

# of neutrons

Explanation:

its how isotope is defined

No, particles of different masses do not have the same average speed at a given temperature.

Temperature is a measure of the average kinetic energy of the particles. Since particles of different masses have different amounts of kinetic energy due to their different masses, they will have different average speeds.

This means that particles of different masses do not have the same average speed at a given temperature. The higher the mass of the particle, the lower the average speed at the same temperature.

This is because when the mass of the particle increases, the amount of kinetic energy also increases, resulting in a slower average speed. On the other hand, particles with a lower mass will have a higher average speed at the same temperature because they have less kinetic energy.

This is why particles of different masses do not have the same average speed at a given temperature.

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The ratio of magnesium to bromine in the compound will be 1:2 that is option D obtained by the electronic configuration.

The arrangement of electrons in an atom, molecule, or other physical structure is referred to as its electron configuration; for instance, the electron configuration of the neon atom is 1s2 2s2 2p6.

One orbital can accommodate a maximum of two electrons and comes in four different shapes: s, p, d, and f. Because they contain various sublevels, the p, d, and f orbitals may each hold more electrons. As previously mentioned, the electron configuration of each element depends on where it sits in the periodic table.

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The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.

From the formula:

F = ma

a = F/m

a = 150/160

a = 0.9375 m/s²

Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.

The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.

The SI unit of force is the newton, symbolised as N. The base units suitable to force are: metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.

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The acceleration of the objection is 0.9375 m/s² if the players still push with a force of 150 N.

The word 'force' has a very precise meaning. Force can be described as push or a pull. A force is not something that an object contains or has in it. A force is exerted on one object by another. The idea of a force is not confined to living things or non-living things.

From the formula:

F = ma

a = F/m

a = 150/160

a = 0.9375 m/s²

Thus, the acceleration of the object is 0.9375 m/s² if the players still push with a force of 150 N.

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Air Temperature is the manipulated variable for the global warming.

Explain about global warming?

Global warming is the long-term warming of the planet due to human activities, such as burning fossil fuels and deforestation, which release greenhouse gases into the atmosphere. These gases trap heat from the sun, raising the Earth’s average temperature. Global warming is causing sea levels to rise, glaciers and Arctic ice to melt, and more extreme weather events, such as heat waves, droughts, floods, and hurricanes. In addition, global warming is affecting ecosystems and biodiversity, as species struggle to adapt to the changing climate. To address global warming, we must reduce our greenhouse gas emissions and transition to renewable energy sources.

The manipulated variable for the global warming experiment is Air Temperature. This is because Iker is measuring the air temperature on the half of the building with the rooftop garden and the half of the building without the garden in order to compare the difference in air temperature between the two locations.

Therefore, option a Air Temperature is the correct answer.

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Covalent bonds are frequently created between the non-metals. These bonds are produced when the atoms are linked electrons. Knowing the number of covalent bonds that exist between any two atoms.

On the exterior of the nucleus, the negative charge particles termed as electrons spin. They spin so swiftly that it can be hard for scientists to keep up with them. The tiniest particle in an atom are drawn towards the metal cation of the protons; 2000 of them can fit within one proton.

The electron, the smallest constituent part of an atom, has a negatively charged. The quantity of protons and electrons in an atom is equal.

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The volume of water must you add have ready to add your acid to (in mL) to prepare a solution with a nitric acid molar concentration of 2.895 M and a volume of 602.244 mL is 487.02 mL

The dilution formula is used to determine the concentration and volume of reagents in a dilution process of acids, bases, or any other solution.

The dilution formula is:

C₁V₁ = C₂V₂

where;

C₁ is the initial concentration

V₁ is the initial volume

C₂ is the final concentration

V₂ is the final volume

Using the dilution formula:

V₁ = C₂V₂/C₁

V₁ = 602.44 * 2.895 / 15.110

V₁ = 115.42 mL

The volume of water needed = 602.44 - 115.42 mL

The volume of water needed = 487.02 mL

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The amount of phosphoric acid that can be formed from 36.4 grams of sulfuric acid would be 24.50 grams.

Phosphoric acid can be formed from sulfuric acid when the acid is reacted with calcium phosphate according to the following balanced equation:

[tex]Ca_3(PO_4)_2 + 3H_2SO_4 -- > 3CaSO_4 + 2H_3PO_4[/tex]

From the equation of the reaction, the mole ratio of sulfuric acid to phosphoric acid is 3:2.

The equivalent mole of 36.4 grams of sulfuric acid would be:

Mole = mass/molar mass

       = 36.4/98

      = 0.37 mol

From the mole ratio, the mole of phosphoric acid formed would be:

2/3 x 0.37 = 0.25 mol

Mass of 0.25 mol phosphoric acid = 0.25 x 98 = 24.50 grams

In other words, the amount of phosphoric acid that would be formed from 36.4 grams of sulfuric acid will be 24.50 grams.

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Answer:

true

Explanation:

Particle pollution — also called particulate matter (PM) — is made up of particles (tiny pieces) of solids or liquids that are in the air. These particles may include: Dust; Dirt; Soot; Smoke;

The number of objects in one mole of something is determined by Avogadro's constant.

Avogadro is known for his contributions to science related to Avogadro's Law, which is a law that states the relationship between the volume of a gas and the number of molecules.

The results of his research were published in 1811 in the Journal de Physique De Lamétherie, de Chimie et d'Histoire naturelle.

In addition, Avogadro also succeeded in formulating the Molecular Theory, which stated that particles could be composed of molecules, where these molecules could be composed of simpler units or atoms.

For this service, the world of science today knows the name Avogadro's Number or Constant = 6.022 × 10²³

This number or constant is used to express the number of particles in one mole of a substance.

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Answer:

electrically positive protons and electrically neutral neutrons.

Explanation:

Atomic nuclei consist of electrically positive protons and electrically neutral neutrons. These are held together by the strongest known fundamental force, called the strong force. The nucleus makes up much less than . 01% of the volume of the atom, but typically contains more than 99.9% of the mass of the atom.

Answer;

Protons and Neutrons

Explanation;

Well, a nucleus consists of protons and neutrons, soo these are the particles

hence Neutrons and Protons.

The current for facial and scalp treatments is measured in milliamperes.

A unit that measures the resistance of an electric current. A measurement of how much electric energy is in one second.

Electric current is measured using the milliampere unit. The electrical current that is equal to the passage of one coulomb per second is one milliampere or 1/1,000 of an ampere. The SI base unit for electric current is the ampere, and the milliampere is a multiple of the ampere. "Milli" serves as the metric prefix for the numbers 10-3. Sometimes a milliampere is referred to as a milliamp. The abbreviation for milliamperes is mA; for instance, 1 mA can be used to represent 1 milliampere.

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The isomerization of cyclopropane to propylene is a first-order process with a half-life of 19 minutes at 500oc. The time it takes for the partial pressure of cyclopropane to decrease from 1. 0 atmosphere to 0. 125 atmosphere at 500oc is closest to 57 minutes.

First, we must get the rate constant.

k= 0.693/ 19 = 0.0365 min⁻¹

Now we need to figure out how long decay takes.

First order kinetics' expression for the rate law is provided by:

t= (2.303/k) log a/(a-x)

where,

Rate constant = k

t = time it took for decay to occur.

Initial reactant pressure equals 1.0 atm, or a.

After the process of decay, a - x equals 0.125 atm of pressure.

After entering all the values into the equation above, we get

t= (2.303/0.0365) log 1/(1-0.125)

t = 57 min

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There are 64g grams of oxygen are in a sample of carbon dioxide (CO₂) that has 24 grams of carbon.

First, carbon and oxygen combine to create CO₂as shown below.

C + O₂ => CO₂

The equation states that one mole of carbon combines with one mole of oxygen to produce one mole of carbon dioxide.

Since C's molar mass is 12 g/mol and O's is 16 g/mol

A mole of (C) weighs 12g.

O₂ is composed of 16(2) = 32g per mole.

As a result, 24g of C would equal 24 32 / 12.

= 768/12

= 64g

Therefore, if there was 24g of carbon, there would be 64g of oxygen.

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No luminaires shall be installed for operation on supply circuits over 150 volts between conductors. Luminaires mounted in walls shall be installed with the top of the luminaire lens not less than 450 mm (18 in.)

In an electrical installation, what is a luminaire?

A luminaire, also known as a light fixture, is a complete lighting assembly that includes one or more lamps (light bulbs or tubes), a socket and other protective elements, wiring that links the lamp to a power source, and a reflector to help direct and spread the light.

The construction, installation, or inclusion of shades or guards on luminaires is required to prevent the exposure of combustible materials to temperatures above 90°C (194°F). Unswitched lamp holders must be used above materials that are very flammable.

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The number of Nitrogen molecules required to make 2 * 10^10 molecules of Ammonia is 3 * 10^10. Hence, the correct option is option A.

We are already aware of the simple molecular reaction between hydrogen, nitrogen which produces ammonia which goes as thus -

= N₂+3H₂ = 2NH₃

This molecular reaction tells us that one mole of nitrogen reacts with three moles of hydrogen in order to create two moles of ammonia.

Here, it is given that we have 2 * 10^10 molecules of Ammonia (NH₃).

We also know the formula = No. of atoms/ Avogadro Number = No. of moles

Hence, we can write that -

= No. of atoms of Nitrogen/ 6.022 * 10^23 = 2(2 * 10^10/6.022 * 10^23)

= No. of atoms of Nitrogen/ 6.022 * 10^23 = 0.6 * 10^-13

=  No. of atoms of Nitrogen =  0.6 * 10^-13 * 6.022 * 10^23

= No. of atoms of Nitrogen = 3.6 * 10^10 atoms

This can be rounded off to 3 * 10^10. Hence, option A is the correct option.

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Jill combines two different sorts of HCl (hydrochloric acid) concentrations: 0. 375 liters of 25% and 0. 625 liters of 65%. The mixed solution will have an HCl concentration of 1L of 50% HCl.

In this case, we're interested in learning the concentration of HCl as a proportion of the total amount.

First off, the combined volume is 0.375 + 0.625 = 1 L.

The percentage can be calculated as follows:

37.5% of the required 25% is present.

while 62.5% of the 75% are in presence

When we talk about the percentage present, we're talking about the 1 total liter that is there.

Consequently, the final mixture's concentration will be;

(37.5% of 25) + (62.5% of 65)

= 9.375% + 40.625%

50% is obtained by adding both.

Therefore, the concentration is 1L of 50% HCl.

Your question is incomplete but most probably your full question was

Jill mixes two types of concentrations od hci (hydrochloric acid) 0.375 liters of 25% hydrochloric acid and 0.625 liters of 65% hydrochloric acid. what is the hcl concentration in the mixed solution?

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1. Na₃P = Ionic compound ; 2. N₂O = covalent compound ; 3. CaSO₄ = Ionic compound; 4. Cl₂O₇ = covalent compound.

When a metal and a nonmetal react, ionic compounds are typically created (or a polyatomic ion). When two nonmetals interact chemically, covalent molecules are produced. As it is a nonmetal, binary compounds containing hydrogen are covalent compounds as well.

An atom can participate in covalent and ionic bonds that are considered as the two main types of bonds. By  electron sharing, two or more than two atoms can form covalent bonds. When two or more than two ions come together, their opposing charges bind them together to form ionic bonds.

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The antibiotic mycomycin has seven sp3, sp2, and sp hybridized carbons in its structure. There are a total of seven hybridized carbons in the molecule.

The antibiotic mycomycin is a type of polyketide antibiotic produced by the bacterium Streptomyces mycomyceticus. It is used to treat various infections, including those caused by bacterial parasites, fungi, and protozoa. Mycomycin works by inhibiting the formation of bacterial cell walls, leading to the death of the infected cells. It is effective against a wide range of bacteria, including Gram-positive and Gram-negative bacteria, as well as some fungal species.

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A link between hydrogen and sulfur is created by sharing the one electron that hydrogen possesses. In its association with sulfur, there isn't another atom. In order to complete the octet, the sulfur atom has a .

Methane, widely known as natural gas, has a healthy substitute in hydrogen. According to estimates, it makes about 75% of the universe's mass and is the most prevalent chemical element. Huge quantities of hydrogen atoms are present on earth in water, plants, animals, and, of course, people.

The sun and the majority of stars include it, while Jupiter is primarily made of it. The most prevalent form of hydrogen on Earth is water. Just under 1 part per million by volume, it only exists as a gas in trace concentrations in the atmosphere.

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The constitutional isomers of C5H12 are pentane, 2-methylbutane, isopentane, 2,2-dimethylpropane, and cyclopentane.

Pentane:

H-C-C-C-C-H

    |   |   |

H-C-C-C-H

2-Methylbutane:

H-C-C-C-C-H

  |   |   |

H-C-C-C-H

 |

CH3

Isopentane:

H-C-C-C-C-H

|   |   |

H-C-C-C-H

   |

CH3

2,2-Dimethylpropane:

H-C-C-C-C-H

|   |   |

H-C-C-C-H

 |   |

CH3-C-CH3

Cyclopentane:

     H

      \

       C-C-C-C-C

       /

     H

Isomers:

Isomers are compounds that have the same chemical formula but different atomic arrangements. They may be constitutional isomers, which have different atomic arrangements in their main chain, or stereoisomers.

Isomers can also be classified as positional isomers, which differ in the position of a functional group within a molecule.

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The molality of the solution is 3.125 m.

Let us recall that the boiling point of the solution is one of the colligative properties and the implication of this is that it depends on the amount of the substance that we can find in the solution.

Note that;

ΔT = K m i

ΔT =  Boiling point elevation

K = boiling constant

m = molality

i = Vant Hoff factor

Then;

ΔT = 101.6 - 100.0

= 1.6°C

Thus;

1.6 = 0.512 * m * 1

m = 1.6/0.512

m = 3.125 m

Thus the molality is 3.125 m

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Answer:

see full answer in below

Explanation:

Convection occurs when heat is transferred through a fluid, such as air or water. Heat is transferred by three main mechanisms: conduction, convection, and radiation. Convection occurs when the molecules of a fluid are heated, causing them to move faster and become less dense. This causes the warmer, less dense fluid to rise above the cooler, denser fluid, creating a convection current. This current transfers energy from the warmer fluid to the cooler fluid, allowing heat to be transferred throughout the system.

In 1 angle AOD is an obtuse angle and is 110°  and angle GOD is an acute angle and it is 70°.

90 degrees is the standard for a right angle. Any angle that is less than 90 degrees is called acute, and any angle that is larger than the 90 degrees is called obtuse.

Follow the instructions below to use a protractor to measure an angle. Align the angle's vertex with the protractor's dot in the center. Set the protractor such that one angle's side is parallel to 0 degrees. Find the point where the angle's opposite side crosses the number scale by reading the protractor.

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1. Calcium has an atomic number of 20 and phosphorus has an atomic number of 15, while radium has an atomic number of 88. This can be used to determine which element was most likely deposited in the workers' bones in place of calcium.

2. Calcium. This is because calcium is an element with an atomic number of 20, meaning it has 20 protons in its nucleus. It is also found in abundance both in the human body and in many foods, making it easy to obtain and store in the body.

Characteristics of Calcium Ions:

- Has a charge of +2

- Located in column 2 of the periodic table

- Atomic number of 20

Reasons it could be Phosphorus:

- Has a charge of +3

- Located in column 3 of the periodic table

- Atomic number of 15

Reasons it couldn't be Phosphorus:

- Has a higher charge than calcium

- Has a different atomic number than calcium

Reasons it could be Radium:

- Has a charge of +2

- Located in column 7 of the periodic table

- Atomic number of 88

Reasons it couldn't be Radium:

- Has a different atomic number than calcium

- Is located in a far different column than calcium on the periodic table

Conclusion
Based on the evidence, it is likely that the source of the poisoning was radium, and from a chemistry perspective, the shop owners were responsible for exposing the workers to this element and, as such, are responsible for their illnesses.