Series: Quantities in Chemical Reactions
This video defines the empirical and molecular formula of a compound.
According to the law of definite proportions ’A chemical compound always contains exactly the same proportion of elements by weight’. In the compound water, obtained from any source, such as rain or a river, the masses of hydrogen and oxygen are always in the ratio of 1:8. The law can be verified experimentally in a laboratory. Copper oxide prepared by different methods contains copper and oxygen in a fixed proportion by weight. Show Less
A balanced chemical equation represents the relative number of the reactant and product species taking part in a reaction. The ratio of the number of moles of any two substances in a chemical reaction is called their mole ratio. The mole ratio is a conversion factor that allows for the conversion between the moles of one substance to the moles of another. Show Less