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Do all pure samples of a given compound have the same percent composition?
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∙ 11y ago
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Is it necessary to know the formula of a compound in order to calculate its percent composition?
YES.For one to know the percentage composition,the amount of moles of the reacting element must be considered using the compound. •Well you dont really have to know just the formula. You can eaither use the formula if its given or the molar mass if its given. i just recently did a test where i was given either the Molar mass or Formula name and i had to figure out the percent composition. so it depends on the info given.
How do you identify a metallic bond when given the formula for a compound?
Chemical compounds do not have metallic bonds - these are restricted to bulk metals and alloys, i.e. samples big enough to have crystal lattices or to produce melts.
Explain how your class's results in this experiment support the law of definite composition?
"The Law of Definite Composition states that the elements in a given compound are always combined in the same proportion by mass."All of the students in our class had different values for the mass of the hydrate and anhydrous salt, but all calculated the same formula for the hydrate. By everyone calculating the same formula for the hydrate, the law of definite composition was proved.
Why two samples of the same pure substance react the same way?
Because they are composed of the very same atoms. There is no difference between their composition, and hence there can be no difference in the way they react. Atoms of the same element have no personalities or individuality; they will always behave the same (given all other conditions are also equal).
What is the name of this ionic compound MgO2?
According to the given chemical formula, the compound is magnesium peroxide. It is an unstable compound in nature though.
How do you know when to solve for a empirical formula?
If it tells you to find the empirical formula when percent composition is given or if the mass of each element is given in a specific compound.
Is it necessary to know the formula of a compound in order to calculate its percent composition?
YES.For one to know the percentage composition,the amount of moles of the reacting element must be considered using the compound. •Well you dont really have to know just the formula. You can eaither use the formula if its given or the molar mass if its given. i just recently did a test where i was given either the Molar mass or Formula name and i had to figure out the percent composition. so it depends on the info given.
Which could represent the empirical and the formula of a given compound?
The empirical formula is representative for the chemical composition of a compound; the structural formula is representative for the spatial structure of the compound.
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 meant by the law of constant composition for compounds?
The law of constant composition for compounds is a law in chemistry according to which any given compound always contains the same component elements in the same ratios, by mass. The ratios do not depend on where the compound comes from or the way in which it was produced.
Who developed the law of definite composition?
In chemistry, the law of definite proportions and also the elements, 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.This observation was first made by the French chemist Joseph Proust based on several experiments conducted between 1798 and 1804. Based on such observations, Proust made statements like this one, in 1806:
What theory states that a given compound will always contain exactly the same proportion of elements by weight?
Law of definite proportion or law of definite composition.
How do you identify and kinds of atoms in a given compound based n its chemical formula?
The chemical formula is representative for a molecule and give indication about the chemical composition.
How the you use the percent composition in every day?
You can use percent composition to see how much much flour contributes to the mass of an overall cake. You can see how much kool aid powder is in a given amount of kool aid drink, in percentage. Percentage composition can be used for virtually anything that has a mixture of things. So you don't always have to think percentage composition refers to chemical compounds, such as H2O or KMnO4.
How do you identify a metallic bond when given the formula for a compound?
Chemical compounds do not have metallic bonds - these are restricted to bulk metals and alloys, i.e. samples big enough to have crystal lattices or to produce melts.
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.
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.
