a type of matter with a fixed composition
Matter is anything that has mass and takes up space. The three states of matter are solid, liquid, and gas. In a solid, the atoms are packed together in a fixed pattern. In a liquid, the atoms are still close together, but they can move around. In a gas, the atoms are far apart and move around freely.
There is another type of matter called a plasma. Plasma is made up of ions and free electrons. The atoms are not held together in a fixed pattern like in a solid or liquid. Plasma is found in the stars and in the atmosphere of Earth.
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What is a fixed composition?
A fixed composition is a piece of music that has a specific set of notes and rhythms that must be played exactly as written. In other words, the performer has no freedom to change the notes or rhythms, and the piece cannot be altered in any way. Fixed compositions are often used in classical music, where the composer’s exact wishes must be followed in order to produce the desired effect.
Is a compound a fixed composition?
A compound is a molecule composed of atoms of more than one element. The atoms in a compound are held together by chemical bonds. The chemical composition of a compound is fixed and cannot be changed.
Is a fixed composition a mixture?
A mixture is a material composed of two or more substances that are not combined chemically. A composition, on the other hand, is a material composed of two or more substances that are combined chemically. Whether a composition is considered a mixture or not largely depends on how stable the combination is. If the substances are combined chemically and remain combined, then the composition is not a mixture. However, if the substances can be easily separated, then the composition is a mixture.
One example of a composition is concrete. Concrete is composed of water, aggregate (such as gravel or crushed stone), and Portland cement. The water and aggregate are combined chemically to create the concrete. The Portland cement is also combined chemically with the water and aggregate, but it is not as stable as the combination of water and aggregate. If Portland cement is mixed with water and aggregate separately, it will not form a stable combination. However, if the water and aggregate are combined and the Portland cement is added last, the combination will be stable.
Another example of a composition is a protein. Proteins are composed of amino acids. The amino acids are combined chemically to create the protein. The combination of amino acids is not as stable as the combination of water and aggregate in concrete or the combination of Portland cement and water and aggregate in concrete. If amino acids are mixed together separately, they will not form a stable protein. However, if the amino acids are combined and the protein is formed last, the combination will be stable.
Does a pure substance have a fixed composition?
A pure substance is a material that has a fixed chemical composition. This means that the atoms that make up the substance are always present in the same ratios. For example, pure water always contains two hydrogen atoms and one oxygen atom.
While the atoms in a pure substance are always present in the same ratios, the molecules that make up the substance can be rearranged. For example, water can exist as a gas, liquid, or solid. The position of the atoms in the molecule is still fixed, but the molecule can take on different shapes depending on the temperature and pressure.
Some substances, like pure gold, can exist in more than one form. For example, gold can exist as a solid, liquid, or gas. However, the ratio of atoms is still the same in each form.
While pure substances have a fixed chemical composition, there is some variability in the purity of a substance. This means that the substance may not always contain the same number of atoms of each type. For example, a sample of pure water may contain a small amount of impurities, like dissolved minerals. However, these impurities will not affect the chemical composition of the water.
Does a homogeneous mixture have a fixed composition?
When most people think of a mixture, they tend to imagine a container filled with a variety of items, such as sand, rocks, and water. This type of mixture, which is called a heterogeneous mixture, is not uniform throughout. Its different parts have different compositions.
A homogeneous mixture, on the other hand, is uniform throughout. Its different parts have the same composition. This means that a homogeneous mixture has a fixed composition.
It’s important to note that a mixture can be either homogeneous or heterogeneous, but it cannot be both. For example, a mixture of sand and water can be either homogeneous or heterogeneous, but a mixture of sand and rocks cannot be both.
So, does a homogeneous mixture have a fixed composition? The answer is yes.
Why do elements have a fixed composition?
The atomic number of an element is fixed, meaning that each element has a specific number of protons in its nucleus. This is why elements have a fixed composition. The number of protons in an element’s nucleus determines how strong the atom’s nucleus is held together by the nuclear forces. The more protons an element has, the stronger the atom’s nucleus is held together.
The number of protons in an element’s nucleus also determines how much energy the atom releases when it undergoes nuclear fission or fusion. When an atom undergoes nuclear fission, it splits into two or more smaller atoms. When an atom undergoes nuclear fusion, it combines two or more smaller atoms into a larger atom. The more protons an atom has, the more energy it releases when it undergoes nuclear fission or fusion.
The number of protons in an element’s nucleus also determines how reactive the atom is. The more protons an atom has, the more reactive the atom is. This is why the most reactive elements are the elements with the highest atomic numbers.
Is fixed composition a pure substance?
Pure substances are those that are composed of one type of atom or molecule. Fixed composition is a property of pure substances, meaning that the atoms or molecules are all of the same type. In other words, a pure substance always has the same composition, regardless of how it is divided or combined.
Water is an example of a pure substance. It is made up of molecules composed of two hydrogen atoms and one oxygen atom. If you divide a glass of water into two parts, each part will still have the same ratio of hydrogen to oxygen atoms. If you combine two glasses of water, the total number of atoms will be the same as if you had combined two glasses of pure water.
Some substances, such as sugar, can be divided into different types of molecules, but each molecule of sugar still has the same chemical composition. Other substances, such as metals, can be combined with different elements, but the atoms in each metal molecule are still of the same type.
Pure substances always have the same composition, regardless of how they are divided or combined.
