Interpretation:
The reason behind the fact that mass of oxygen in combustion analysis is not calculated by same procedure as used for carbon and hydrogen has to be determined.
Concept Introduction:
Mole is S.I. unit. The number of moles is calculated as ratio of mass of compound to molar mass of compound.
Molar mass is sum of the total mass in grams of all atoms that make up mole of particular molecule that is mass of 1 mole of compound. The S.I unit is
The expression to relate number of moles, mass and molar mass of compound is as follows:
Mass percent is calculated by the mass of the element divided by the mass of compound and multiplied by 100.
The formula to calculate mass percentage of substance is as follows:
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