by inspecting the balanced equations can you see why one acid required more base to neutralize it than the other acid did? explain.

The mass number of an atom of potassium that has 20 neutrons is option C. 39

Mass number-

Mass number is the total number of protons and neutrons in the nucleus of an atom is called the mass number. It is represented by the symbol A. In other words, mass number refers to the sum of the number of protons and neutrons in the nucleus of an atom.

Atom-

Atoms are tiny particles that make up everything in the world. Everything in the world is made up of tiny particles known as atoms. An atom is the basic unit of matter. The term "atom" comes from the Greek word atomos, which means indivisible.

The basic building blocks of all matter are atoms, which are made up of three types of particles: protons, neutrons, and electrons.

In a neutral atom, the number of electrons is equal to the number of protons, thus the overall charge on the atom is zero. However, the mass number of the atom is equal to the sum of the number of protons and neutrons.

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Answer:

The empirical formula of metal fluoride is CuF2 when a 12.68 g sample of copper is heated in the presence of excess fluorine a metal fluoride is formed with a mass of 20.27g.

Empirical formula of the compound is the Ratio of the atoms present in the compound .It is a simplest whole number chemical compound.

No. of moles of the element is calculated as ,

No of moles of the element= mass of the element / molar mass of the element

so mass of the copper is 12.68gram and the molar mass of the carbon is 63.546 g/mole. It forms the total mass of 0.1995 mol. Reacting with flourine to get CuF2 .

Mass of the metal fluoride formed is 20.27 g.

Moles of copper = 12.68g/63.546g/mole

molar mass of florine is 18.99 g/mol.

molar mass of CuF2 is 101.543 g/mol.

so, 0.1995 mol . 101.543 g/mole =  20.27 g

hence proved the empirical formula of metal fluoride is CuF2.

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Answer:

The atomic combinations can be matched to the appropriate functional groups as follows:

- A. C-O-C: C. Ester

- B. O=C-O-H: B. Carboxylic acid

- C. O=C-O-C: C. Ester

- D. C-O-H: A. Alcohol

Explanation:

Answer:

The explanation of the type of situation would be characterized below.

Explanation:

Answer:

The amount of energy produced is less than 454 kJ.

Explanation:

I do not know but if am wrong you can correct me. I need your help for business, english and chemistry questions on my profile. So can you and the other person who commented and go on my profile please...? the due date already gone 12 days ago.

The ion that is isoelectronic with krypton is Br+.

Isoelectronic species have the same number of electrons, even though they may be different elements or ions. Krypton (Kr) is a noble gas with the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶, which contains a total of 36 electrons. To determine which ion is isoelectronic with krypton, we need to find an ion with the same number of electrons.

Among the options given, the ion Br+ is isoelectronic with krypton. Bromine (Br) has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵. By losing one electron, bromine forms the Br+ ion, which then has the same number of electrons as krypton.

The other options, O-, Se-, and Rb+, do not have the same number of electrons as krypton. The ion O- has 10 fewer electrons than krypton, Se- has 8 more electrons, and Rb+ has 36 more electrons.In summary, among the given options, Br+ is the ion that is isoelectronic with krypton because it has the same number of electrons. isoelectronic species and electron configurations to deepen your understanding of this concept.

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The type of chromatography described, where a specimen is spotted on a silica-coated glass plate and the retention factor for migrated substances is calculated, is called Thin-Layer Chromatography (TLC).

TLC is a chromatographic technique used to separate and analyze mixtures of compounds. In TLC, a thin layer of adsorbent material, such as silica gel or alumina, is coated onto a glass or plastic plate. The specimen is applied as a spot near the bottom of the plate, and the plate is then placed in a solvent system. As the solvent moves up the plate through capillary action, the different components of the mixture will migrate at different rates, resulting in separation. The retention factor (Rf) is a ratio that represents the distance traveled by the compound divided by the distance traveled by the solvent front and is used to identify and characterize the components in the mixture.

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When alkaline hydrolysis was first invented, people were hired for various roles related to the process and implementation of this technology. Some of the jobs that emerged include Chemical engineers, Technicians and operators, Waste management specialists, Scientists and researchers.

Chemical engineers: These professionals played a crucial role in developing and optimizing the alkaline hydrolysis process. They were responsible for designing the equipment, developing the necessary chemical reactions, and ensuring the efficient operation of the system.

Technicians and operators: Skilled technicians and operators were hired to operate and maintain the alkaline hydrolysis equipment. They were trained to monitor the process parameters, handle the chemicals involved, and ensure the proper functioning of the system.

Waste management specialists: With the introduction of alkaline hydrolysis as a method for disposal of organic waste, specialized professionals in waste management were employed to oversee the proper handling and treatment of the waste materials. They were responsible for implementing safety protocols, managing waste streams, and complying with environmental regulations.

Scientists and researchers: Alkaline hydrolysis required scientific expertise for continuous improvement and innovation. Scientists and researchers were hired to study the process, analyze the results, and explore potential applications in various fields such as biofuel production and chemical synthesis.

Overall, the introduction of alkaline hydrolysis created employment opportunities for professionals in engineering, chemistry, waste management, and research, among others, as this technology gained recognition and adoption.

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The statement "Cross interactions between components of a mixture are represented by the ideal mixture model." is False.

The ideal mixture model represents interactions between components of a mixture as zero. According to the ideal mixture model, the energy of a mixture of gases is determined entirely by the kinetic energy of the individual molecules in the mixture.

A binary solution is a mixture of two pure components. An ideal solution is one in which the behavior of each component is ideal, implying that the intermolecular forces between the different molecules are identical, as are the intermolecular forces between the like molecules. In this case, the interactions between the molecules in the solution would be identical to the interactions between the molecules in the pure liquids.

The model that represents cross interactions between components of a mixture is the non-ideal mixture model. Non-ideal mixtures are mixtures in which the intermolecular forces between the components vary from one component to the next.

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Answer:

the answer is C.

Explanation:

Answer: I think the answer would be C

Explanation: The answer is C because of the fact that mixtures are 2 or more substances that are combined and they will have several different types of substances and other chemicals in there. Also if you have a mixture well then it probably will have more than just 1 different kind or different types of properties inside of the mixture and inside the substances as well. If you do have a chemical change or chemical reaction then that can indeed separate any or maybe even all of the different molecules and the mixtures as well. Hoped i helped:)

While naming a compound, the less electronegative element is written first in the formula.

Generally, the less electronegative element is written first while writing the formula, though there are a few exceptions. Basically, carbon is always written first in a formula and hydrogen is after nitrogen in a formula such as NH₃. The common order of common non-metals in binary compound formulas is C, P, N, H, S, I, Br, Cl, O, F.

Generally, electronegativity is defined as a chemical property which describes the tendency of an atom or a functional group to attract electrons toward itself. The electronegativity of an atom is basically affected by both its atomic number and the distance that its valence electrons reside from the charged nuclei. And the more electronegative element is written in the first name of the compound.

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The correct product from this reaction is the structure in option D.

An amine is a compound that contains an alkyl group and an amino group. We know that we can obtain an amine from ammonia by replacing one or more hydrogen atoms with alkyl groups.

The compound as shown here is a secondary amine because two hydrogen atoms have been replaced with alkyl groups. We know that the reaction between the HCl and the amine produces an ionic compound owing to the fact that the nitrogen and the hydrogen from HCl are involved in a Dative bond.

As such, the correct product from this reaction is the structure in option D.

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Answer:

Explanation:

add the statements n will answer w/ 'em thanx

A: Air Pressure south of the jet stream is greater than north of the system

B the jet stream moves storms in to areas with its slow level winds.

C Clear nice weather follow along the the near stream as it winds move eastward

D As the jet stream moves southward, it will bring with it cooler temperatures

ans is d

Answer:

6.63 grams of CO₂ can be produced.

Explanation:

1 mol of C₃H₈ reacts to 5 moles of oxygen, in a combustion reaction in order to produce 3 moles of carbon dioxide and 4 moles of water.

First of all, we need to know, the limiting reactant:

5.52 g . 1mol / 44g = 0.125 moles of C₃H₈

8.03 g . 1mol/ 32g = 0.251 moles of oxygen.

1 mol of C₃H₈ can react to 5 moles of O₂

Then, 0.125 moles, must react to (0.125 . 5) /1 = 0.625 moles.

We only have 0.251 moles of O₂ and we need 0.625 moles. Cause we do not have enough oxygen, that's the limiting reagent.

5 moles of oxygen can produce 3 moles of CO₂

0.251 moles may produce (0.251 . 3) /5 = 0.1506 moles.

We convert the moles to mass : 0.1506 mol . 44g /mol = 6.63 g

Reaction is: C₃H₈  +  5O₂ →  3CO₂  + 4H₂O

The atomic number of the atom shown in the picture would be nine because there is a total of nine protons present inside the nucleus of the atom and the number of protons represents the atomic number of the atom.

The number of neutrons is unrelated to the atomic number of an atom.

An atom's atomic number is determined by the total number of protons it contains.

The number of neutrons is unrelated to the atomic number of an atom.

The atoms in the image would have an atomic number of nine since its nucleus contains a total of nine protons, and the number of protons corresponds to the atomic number of the atom.

Thus, the atomic number of the atom shown would be nine.

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The goal of the Viscosity lab is to investigate how temperature influences viscosity.

Viscosity is a measure of a fluid's resistance to flow. In this lab, the main question being addressed is how temperature affects viscosity. By conducting experiments and analyzing the results, the goal is to understand the relationship between temperature and the flow properties of a fluid.

The lab may involve measuring the viscosity of different liquids at various temperatures and observing how the viscosity changes as the temperature is manipulated. The focus is on examining how the internal structure and intermolecular forces within the fluid are affected by temperature, leading to changes in viscosity.

By answering this question, the lab aims to provide insights into the fundamental properties of fluids and their behavior under different temperature conditions, contributing to a better understanding of the concept of viscosity.

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6.5 g/cm³

Hi there !

density formula

d = m/V

1ml = 1cm³

= 26g/4cm³

= 6.5 g/cm³

Good luck !

Answer:

ATOMIC number of element A is 3

Explanation:

Atomic number is the same as number of protons of an element.

according to the periodic table, Lithium is the element with 3 protons in its neutral state and it's atomic number is 3.

Reflecting telescopes are preferred for scientific research because they are better suited for gathering large amounts of light and producing high-quality images. However, refracting telescopes are still popular for amateur astronomers and for viewing objects on Earth.

Reflecting telescopes are different from refracting telescopes because reflecting telescopes use mirrors, whereas refracting telescopes use lenses. The reflecting telescope was invented in 1668 by Sir Isaac Newton, and it has since become one of the most popular types of telescopes.
Reflecting telescopes use a mirror to gather and focus light, while refracting telescopes use a lens to do the same thing. Reflecting telescopes can be made much larger than refracting telescopes because it is easier to make large mirrors than it is to make large lenses. The mirror in a reflecting telescope is placed at the back of the telescope, and it gathers and reflects light back to a secondary mirror, which then reflects the light to the eyepiece. The eyepiece is where the observer looks through the telescope.In contrast, the lens in a refracting telescope is placed at the front of the telescope, and it gathers and bends light as it passes through. The lens focuses the light onto an eyepiece at the back of the telescope. Refracting telescopes are generally smaller than reflecting telescopes because of the difficulty of making large lenses.
Another difference between reflecting and refracting telescopes is the way they are constructed. Reflecting telescopes have a simple tube that houses the mirrors and eyepiece, while refracting telescopes have a more complex design with a long tube that contains the lens and eyepiece.

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Answer:

A

Explanation:

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Answer:

guhhh

Explanation:

When calculating the number of neutrons you subtract the mass number from the atomic number?

Since the vast majority of an atom's mass is found its protons and neutrons, subtracting the number of protons (i.e. the atomic number) from the atomic mass will give you the calculated number of neutrons in the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).

As a result, the formula for this reaction is "two moles of hydrogen react with one mole of oxygen to generate two moles on water." It takes 10 moles for oxygen gas to create 20 moles of water.

Oxygen and hydrogen react at a 2:1 molar ratio, as shown by the reaction equation. In this case, 8.0 mol of oxygen will be needed for every 16.0 mol of hydrogen. There is only 0.50 mol pf oxygen reactant at hand. Thus, the limiting reactant is oxygen.

We divide the amount of moles by the molar mass to get the mass of two moles of water: 36 g is equal to 2 mole X [2(1) + 16]g/mole. Its molar weight of water equals 18 g/mole because we may calculate a compound's molar mass by adding the masses of its constituent atoms.

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Answer:

No it is not a physics because in this there is about classification of element so it is in chemistry that's why it is not physics.

The volume of concentrated aqueous ammonia must be diluted to 1.00 l to make a solution that has a molarity of 1.85 m. concentrated nh3 (aq) is 15 m. report the volume of concentrated aqueous ammonia in milliliters is 123 mL

The number of moles of solute must always remain constant while diluting solutions, which is the most crucial thing to remember.

In other words, the amount of solute in the concentrated sample must be identical to the amount of solute in the diluted solution.

The concentration is the number of moles per unit volume. So

c=n/V

n=CV

n= 1.85x1

n=1.85

Now your task is to determine what volume of the concentrated solution would contain this many moles of ammonia.

Plugging the values, we get

V=1.85/15

V=0.123 L

Now for dilution calculations, we have

C1V1=C2V2

V1=C2/C1.V2

V1=1.85/15x1.00= 123 mL

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