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Are elements that make up a compound always present in the same proportions?
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∙ 11y ago
wetrippymane
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∙ 11y ago
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∙ 11y agoyes!
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What law states that a compound always contains the same elements in the same proportion by mass regardless of amount?
law of definate proportions
What differences are there between compounds and mixtures?
Elements and compounds are pure substances. They cannot be broken down further by physical and/or chemical means. Mixtures, on the other hand, are physical combinations of pure substances . A compound is when two or more different types of elements are chemically bonded but a mixture is when there is different types of elements that is not chemically bonded but physically bonded.
Can the proportions of magnesium and oxygen in magnesium oxide be changed?
No. Magnesium oxide, MgO, is a compound, which means it is a pure substance, in which the magnesium and oxygen are present in definite proportions, in this case 1:1. This is in accordance to the law of definite proportions, which states that every pure substance always contains the same elements combined in the same proportions by weight. Also, magnesium ions have a charge of 2+ and oxide ions have a charge of 2-, so that one magnesium ion combined with one oxide ion balances to an overall charge of zero.
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
When geologists say that a mineral always contains certain elements in definite proportions they mean that the mineral always has what?
A chemical formula.
Is it true that the elements that make up a compound are always present in the same proportions?
Yes: That relationship is part of the definition of a compound.
What is the law of proportions?
A chemical compound always contains exactly the same proportion of elements by mass. ---------------------------------------------------------------------------------------------------- A law that states that a compound always contains the same elements in the same proportions. Source: e2020
Is the amount of elements needed to make a compound always the same?
The proportions are always the same.
Does a compound always contain the same element in the same proportions?
Yes, except that "element" should be pluralized; a compound always has at least two elements.
Who said that a given compound always contains the same elements in the same proportions by mass?
chemist named Proust
What is the law of definite proportions?
A chemical compound always contains exactly the same proportion of elements by mass. ---------------------------------------------------------------------------------------------------- A law that states that a compound always contains the same elements in the same proportions. Source: e2020
What law states that a compound always contains the same elements in the same proportion by mass regardless of amount?
law of definate proportions
State the law of definite proportions?
The law of definite proportions states that all chemical compounds have constant proportions of their components.
What is the substance of classified as compound?
A compound is defined as a substance that contains at least two chemical elements and always has a constant mass ratio between elements for each possible pair of the elements that are present in it.
The law of definite proportions states that a compound always contains the same elemtents in the smae proportions?
true
What is a fixed proportion in chemistry?
You think probable to the law of definite proportions: the ratio of elements in a compound is always the same. Now this law is for the most part obsolete.
Is the law of definite proportions says that the composition of a compound always the same?
always the same
