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The statement that a chemical compound always contains the same elements in exactly the same proportions is called the law of?
"In chemistry, the law of definite proportions and also the elements, sometimes called Proust's Law, states that a chemical compoundChemical_compoundalways contains exactly the same proportion of elementsChemical_elementby mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition." - Wikipedia
What is the principle of common proportions?
The relative proportions of ions in sea water are constant. In other words, the percentage accounted for by each ion is always the same. This implies that the oceans are chemically well-mixed and that ocean salinity varies almost entirely as a result of the addition or removal of pure water, not the addition or removal of salts. - A.J. F
Why is the law of definite proportion important.?
In chemistry, the law of definite proportions, sometimes called Proust's Law, states that a chemical compound always contains exactly the same proportion of elements by mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition by mass. For example, oxygen makes up about 8/9 of the mass of any sample of pure water, while hydrogen makes up the remaining 1/9 of the mass. Along with the law of multiple proportions, the law of definite proportions forms the basis of stoichiometry.
Do you need to know the individual masses of the samples of water and salt in order to measure the change in mass when the two samples are mixed?
No, you do not need to know the individual masses of the samples of water and salt to measure the change in mass when they are mixed. You can simply measure the mass of the mixture before and after mixing to determine the change in mass.
The density of a substance is the same for all samples of the substances?
Density is simply the mass divided by volume. This means that it is the amount of the substance in a specific unit of space. Because a pure substance indicates that it is exactly that, a substance made of a specific combination of elements, it will always have the same density because those elements can only take one form in order for it to be pure.
Is chicken noodle soup and garden soil examples of compounds?
A heterogeneous mixture is one in which different samples are not necessarilymade up of exactly the same proportions of matter.One common heterogeneous mixture is chicken noodle soup: One spoonful might contain broth, noodles, andchicken, while another contains only broth.
What are the characteristics of heterogeneous mixtures?
A heterogeneous mixture has two or more distinct phases with different characteristics. Because of this, two random samples of a heterogeneous mixture may have different compositions. For example, the phases in mud are the water and soil particles, which remain distinct from one another. These phases are not necessarily visible, but may exist as microscopic clusters or particles. By contrast in a homogeneous mixture any two random samples will be identical.
What are samples of mixture?
salad
The statement that a chemical compound always contains the same elements in exactly the same proportions is called the law of?
"In chemistry, the law of definite proportions and also the elements, sometimes called Proust's Law, states that a chemical compoundChemical_compoundalways contains exactly the same proportion of elementsChemical_elementby mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition." - Wikipedia
Which of the samples dissolved partially not completely?
what is the appearance of the mixture
Samples are chosen in such a way that each member of the population has a known,though not necessarily equal, chance of being included in the sample?
Random samples
Can the composition vary in a homogeneous and heterogeneous mixture?
In a homogeneous mixture, the composition remains uniform throughout the mixture, meaning all samples taken from different parts will have the same composition. In a heterogeneous mixture, the composition can vary throughout the mixture, leading to different samples having different compositions.
What is the principle of common proportions?
The relative proportions of ions in sea water are constant. In other words, the percentage accounted for by each ion is always the same. This implies that the oceans are chemically well-mixed and that ocean salinity varies almost entirely as a result of the addition or removal of pure water, not the addition or removal of salts. - A.J. F
According to the law of definite proportions any two samples of KCl have?
According to the law of definite proportions, any two samples of potassium chloride (KCl) will contain the same elements (potassium and chlorine) in the same proportion by mass. This means that regardless of the amount of KCl in each sample, the ratio of potassium to chlorine will be constant.
What is the principles of proportion?
The principle of constant proportions state that the ratio of major salts in samples of seawater from various places is a constant. It is a law stating that every pure substance always contains the same elements combined in the same proportions.
According to the law of definite proportions any two samples of KCI will have?
According to the law of definite proportions, any two samples of KCl (potassium chloride) will have the same ratio of potassium to chloride ions by mass. This means that the composition of KCl is fixed and consistent regardless of the amount of the substance present.
Is the law of definite proportions important?
In chemistry, the law of definite proportions, sometimes called Proust's Law, states that a chemical compound always contains exactly the same proportion of elements by mass. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition by mass. For example, oxygen makes up about 8/9 of the mass of any sample of pure water, while hydrogen makes up the remaining 1/9 of the mass. Along with the law of multiple proportions, the law of definite proportions forms the basis of stoichiometry.
