CHEMISTRY HIGH SCHOOL

Which molecules contain good leaving groups?

Answers

Answer 1
Answer:

Answer:

proton and neutron

Explanation:

proton is positive while neutron is neutral so they can live togher

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What are energy sublevels? (A)multiple energy levels of any magnitude within an energy level (B)multiple orbitals of specific magnitude within an energy level (C)only those energy levels that overlap others (D)electrons whose energy has dropped to a lower state
Atomic emission spectra are produced when the light emitted by an element passes through a prism. Which of the following statements is true regarding these spectra?A. All elements produce the same atomic spectra. B. Elements produce continuous spectra. C. Elements produce spectra with only a few distinct lines.
During a flame test, ions of a specific metal are heated in the flame of agas burner. A characteristic color of light is emitted by these ions inthe flame when the electrons(1) gain energy as they return to lower energy levels(2) gain energy as they move to higher energy levels(3) emit energy as they return to lower energy levels(4) emit energy as they move to higher energy levels
Can someone show me a step by step with the answer?

On the pH scale, a 7 indicates _____.
a base
an acid
neutrality

Answers

Answer:   C) Neutrality

Explanation:

Answer:

Neutrality

Explanation:

What is the compound name for P4Br8

Answers

Tetra phosphorous octa bromide is the compound name for P4Br8.

What is compound?

A substance is from a combination of two or more different chemical elements. They are pure chemical substances found in nature.

  • The smallest unit of a compound is molecule.
  • Both phosphorous and bromide are on the right side of the periodic table.
  • Both phosphorous and bromide form covalent bond.
  • Atomic weight of phosphorous is 30.97 and atomic number is 15.
  • Atomic weight of bromine is 79.9 and atomic number is 35.

The name is tetra because there are 4 phosphorous and octa means there is 8 bromide.

The ratio of phosphorous and bromide is 4:8.

Tetra phosphorous octa bromide is the compound name for P4Br8.

Learn more about compounds here:

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These are both on the right side of the periodic table, so they bond covalently.The name would be TETRAphosphorous OCTAbromide. Tetra because there are 4 phosphorus molecules, and octa because there re 8 bromine molecules
Hope that helps!

Which of the following is represented in the highest percentage by volume in dry air?A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen

Answers

Answer is: C. nitrogen.

Together, nitrogen (N₂) and oxygen (O₂) by volume account for 99.03% volume of the gases composing the dry air in the lower atmosphere.  

Volume of nitrogen in air is 78.08%.  

Volume of oxygen in air is 20.95%.  

Together: 78.08% + 20.95% = 99.03%.  

This gases can be separated by fractional distillation of liquefied air.

Compare the speed and space of atoms in a solid, liquid and gas.

Answers

Answer:

Decrease order of speed of atoms in solid state, liquid state and gaseous states:  gas > liquid> solid

Decreasing order of space of atoms in solid state, liquid state and gaseous states:  gas > liquid> solid

Explanation:

Solid state : In this state, the particles are closely packed and does not have any space between them. They have least kinetic energy due to restricted movement. This state has a definite shape and volume.

Liquid state :  In this state, particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another and thus have higher kinetic energy as compared to solids. This state has a definite volume but does not have a fixed shape.

Gaseous state :  In this state, particles are loosely arranged and have a lot of space between them. They have highest kinetic energy. This state has indefinite volume as well as shape.

Decrease order of speed of atoms in solid state, liquid state and gaseous states:  gas > liquid> solid

Decreasing order of space of atoms in solid state, liquid state and gaseous states:  gas > liquid> solid
Atoms in a solid stay closely together and form this sort of structure in their atoms , a liquids atoms are slightly spread apart and move around more freely than the solid atoms , gas atoms move as far away as possible from each other ( moving around a lot )

Summarize the five points of Dalton’s atomic theory, and explain at least one change that occurred to the atomic theory because of further experimentation.Important Points:
All matter is composed of very small particles called atoms.
All atoms of a given element are identical.
Atoms cannot be created, destroyed, or subdivided.
Atoms combine with or separate from other atoms.
Atoms combine with each other.

Answers

Five points of Dalton's atomic theory:
1) all elements are made up of atoms. 
2) atoms are so small that they cannot be divided any further. 
3) an atom can neither be destroyed nor be formed. 
4) atoms of an element are similar, they posses same mass and same properties. 
5) atoms of different elements combine in a definite ratio to form compounds. 

Due to further experimentation it was concluded that atom is made up of small particles identified as proton, neutrons, and electrons. They can be further subdivided.

Another change is the presence of isotopes of atoms of different elements. Hence, atoms of the same element can also have different masses. 

In relation to chemical solutions, which term does not express a degree of saturation?A: unsaturated
B: saturated
C: supersaturated
D: oversaturated

Answers

Answer: The correct answer is Option D.

Explanation:

From the given options:

Option A: Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.

Option B: Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.

Option C: Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles.

Option D: Oversaturated is defined as the to saturate the solution excessively or to provide with more amount of substance for saturation.

Hence, the correct answer is Option D.
The answer is D. oversaturated. The term to represent the solution contains more solid solute than saturated solution is supersaturated, not oversaturated.
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