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No. A compound will always have the same composition.
These compounds are called isomers.
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.
have different molecular arrangements or crystal structures that affect how closely the atoms are packed together. This can result in variations in the density of the compounds, even though they have the same chemical composition.
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
Today this assertion is only partially valid; many nonstoichiometric compounds are known.
Having a fixed composition means that a substance always contains the same elements in the same proportion by mass. This characteristic is a defining feature of pure substances like elements and compounds.
It does not necessarily mean that. For example glucose (C6H12O6) and formaldehyde (CH2O) have the same percentages of elements by mass, but are two very difference compounds.
No, compounds do not always contain the same elements in the same ratio. Compounds are formed by the combination of two or more elements in fixed proportions by mass. The ratio of elements in a compound is determined by the chemical formula of the compound.
the composition varies from one compound to another
Nonstoichiometric compounds have a variable composition.
the sperm may not alwayse get to the egg