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Rutherford's gold scattering experiment is an important event in the history of science because it led to the discovery of the nucleus.
The mole fraction of a substance in the mixture is the ratio of the mole of the substance in the mixture to the total mole of the mixture. Since it is the ratio of moles to moles, it is a dimensionless quantity. The mole fraction is sometimes called the amount fraction.
The mass fraction of a substance in a mixture is the ratio of the mass of the substance to the total mass of the mixture. It is also known as mass per cent or percentage by mass when expressing in percentage. Since the mass fraction is a ratio of mass to mass, it is a dimensionless quantity.
The empirical formula is the formula formed by atoms of a compound (or a molecule) such that atoms of an element are in the simplest relative ratio.
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