Which statement describes the chemical property of oxygen
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According to the forces of attraction, in the process of sublimation the substance changes from solid to gaseous form directly.
What are forces of attraction?
Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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Sublimation is like the changing a solid into a gas without passing through the liquid phase. To sublime a substance, a specific energy has be transferred to the via heat or work.
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In terms of ion charges and chemical change, CuF ha +1 charge and CuF₂ has +2 charge. This is the difference between CuF(s) and CuF2(s).
What are ions ?
An atom or molecule with a net electrical charge is known as an ion. Conventionally, the charge of an electron is thought to be negative; this charge is equal to and opposite to the charge of a proton, which is thought to be positive.
As stability depends on the hydration energy of the ions when they connect to the water molecules, Cu2+ is more stable than Cu+. Because the Cu2+ ion makes significantly stronger bonds and has a higher charge density than the Cu+ ion, it releases more energy.
Copper(I) ion is created when copper provides one electron to another atom; this accounts for the +1. Copper has one fewer electron than protons. Copper(II).
Thus, In terms of ion charges and chemical change, CuF ha +1 charge and CuF₂ has +2 charge.
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Answer:
See explanation!
Explanation:
To answer this, it would be helpful to first determine what natural selection is. Natural selection is a biological process in which species evolve and adapt over time, in order to better fit their environment.
In any ecosystem, there are going to be limited resources. This simply means that species that are most suitable for the environment will survive and have the chance to reproduce.
This means that the environment determines when natural selection happens, but also what it looks like.
This might be better understood with an example:
For example, after several volcano eruptions in a stretch of the desert, the field mice population, over the next generations, gradually became black, rather than their original tan color.
This is because the vast desert sands were replaced with large patches of black volcano rock, so the mice that were previously able to camouflage and avoid detection by predators now weren't able to.
On the other hand, genetically mutated black field mice now had a far greater chance of surviving, and hence the population of field mice gradually became black.
This example illustrates how a change in the environment, caused the process of natural selection and ultimately the characteristic of having black fur to be more advantageous.
Over time, the process of natural selection made it so that the field mice population was black.
Keywords:
Natural Selection
Environment
Genetic Mutations
Population
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Mass is the quantity of matter present in a substance. The masses of the most abundant molecule of are 85.9325, 87.9296, and 89.9267 amu.
What are isotopes?
Isotopes are the elements of the same species with the same atomic number but differ in atomic mass and physical properties.
% abundance and mass of chlorine are:
Cl-35 = 34.9688 amu
Cl-37 = 36.9659 amu
% abundance and mass of oxygen are:
O-16 = 15.9949 amu
O-17 = 16.9991 amu
O-18 = 17.9991 amu
O -16 is the most abundant form of the oxygen isotope and Cl -35 of chlorine.
The masses of the most abundant molecule are given as:
Cl-35, Cl-35, O-16:
Cl-35, Cl-37, O-16:
Cl-37, Cl-37, O-16:
Therefore, 85.9325, 87.9296, and 89.9267 amu are the masses of the most abundant form of the molecule.
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Chlorine has the following % abundance and mass:
Cl-35 = 75.76 %, 34.9688 amu
Cl-37 = 24.24 %, 36.9659 amu
Oxygen has the following % abundance and mass:
O-16 = 99.757 %, 15.9949 amu
O-17 = 0.038 %, 16.9991 amu
O-18 = 0.205 %, 17.9991 amu
Based in the % abundance O-16 is the most abundant oxygen isotope and Cl-35 is the most abundant chlorine isotope
So the most abundant molecule of Cl2O and their respective mass are as follows:
1) Cl-35, Cl-35, O-16
Mass = 34.9688 amu + 34.9688 amu + 15.9949 amu = 85.9325 amu
2) Cl-35, Cl-37, O-16
Mass = 34.9688 amu + 36.9659 amu + 15.9949 amu = 87.9296 amu
3) Cl-37, Cl-37, O-16
Mass = 36.9659 amu + 36.9659 amu + 15.9949 amu = 89.9267 amu
.Can travel through a vacuum
.Travels most slowly through a gas
.Speeds up when temperature is increased
.Is caused by vibration