write the formula of calculating number of moles when the molecular mass is given.
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So in order to calculate the number of moles of any substance present in the sample, we simply divide the given weight of the substance by its molar mass. Where 'n' is the number of moles, 'm' is the given mass and 'M' is the molar mass.
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So in order to calculate the number of moles of any substance present in the sample, we simply divide the given weight of the substance by its molar mass. Where (n) is the number of moles, (m) is the given mass and (M) is the molar mass.
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