CHEMISTRY HIGH SCHOOL

Draw a model that compares the arrangement of the subatomic particles of oxygen-16 to another isotope, oxygen-18.​

Answers

Answer 1
Answer:

Explanation:

Answer and Explanation:

Oxygen-16 and oxygen-18 differ in structure only in that oxygen-18 has two more neutrons in its nucleus than oxygen-16 has.

There are three known stable isotopes of oxygen (8O): 16O, 17O, and 18O. Radioactive isotopes ranging from 11O to 26O have also been characterized, all short-lived.

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What is the ratio of al3+ ions to s2- ions in a neutral compound1:1
2:1
2:3
3:2

Answers

The ratio of Al^3+ ions to S^2- ions in a neutral compound is 2:3.

The neutral compound formed by aluminum ion and sulphide ion is aluminium sulphide, with chemical formula Al2S3. Looking at the chemical equation, you will observe that, for each molecule of aluminium sulphide, there is two atoms of aluminium and three atoms of sulphur. This is the ratio of combination for the compound, that is, for every two atoms of aluminium, there are three atoms of sulphur, thus, the combination ratio is 2:3.

2:3. The neutral compound formed between aluminium and sulfur is Al2S3 since aluminium has the valence 3 and sulfur is 2. So there are 2 aluminium atoms for every 3 sulfur atoms and the ratio is 2:3.

What is the pH of a solution with [H+] = 1.25 mc015-1.jpg 10–10 M?

Answers

Answer : The pH of a solution is, 9.903

Explanation : Given,

Concentration of hydrogen ion = 1.25* 10^(-10)M

pH : It is defined as the negative logarithm of hydrogen ion concentration.

Formula used :

pH=-\log [H^+]

Now put the value of hydrogen ion concentration in this formula, we get the pH of a solution.

pH=-\log (1.25* 10^(-10))

pH=9.903

Therefore, the pH of a solution is, 9.903
[ H+]=10-pH
it become
[H+]=0.1

Which is the noble-gas notation for lead (Pb)?[Rn]6s24f145d106p2

[Rn]6s25d106p2

[Xe]6s24f145d106p2

[Xe]6s25d106p2

Answers

I believe the correct answer from the choices listed above is the third option. The noble-gas notation for lead (Pb) would be [Xe]6s^2 4f^14 5d^10 6p^2. The standard electron configuration of lead is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^2 simplifying will lead to the part having the same configuration as xenon to be written as [Xe].

Answer:

[Xe]6s24f145d106p2

Explanation:

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How does temperature impact the mixture of ethanol and water?????????????

Answers

The temperature impact the mixture ethanol and water because of the ions that exist between them. As temperature increases, the kinetic energy of the molecules is high because there is room for movement.

Which of the following is not a type of adaptation? A. Functional B. Mechanical C. Behavioral D. Structural

Answers

B. Mechanical-  is NOT a type of adaptation

If atoms are made of smaller parts such as electrons, why are atoms considered the basic unit of matter?

Answers

Atoms are considered the basic unit of matter because it is atoms that make up the elements which in turn combine to form compounds that exist in all states. It is true that atoms are made up of electrons and neutrons and protons, but they are not useful on their own individual level. Like, you don't hear anyone say that "the particles that make up atoms are the basic unit of matter". 

Explanation:

Atoms are considered as the basic unit of matter because atoms combine to form matter. Atoms combine to form elements and compounds which further make up the atom.

Atoms contain electron, proton and neutrons. Electrons are negatively charged particles. They do not combine to form matter. A stable atom is a combination of fixed number of electrons, protons and neutrons.

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