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Showing posts with label EDEXCEL AS 2018. Show all posts
Showing posts with label EDEXCEL AS 2018. Show all posts
Calculation from percentage composition :
Calculation from percentage composition : we can carry out experiments to find out mass of each element in a given (known) mass of a substance the values can …
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Molecular and empirical formula
Molecular formula the molecular formula of a compound shows the number of atoms of each element in one molecule of a substance for example the molecular formul…
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Topic 1 : Formulae, Equations and Amount of Substance (EDEXCEL AS 2018)
In chemistry the amount of substance is always measured in moles A mole is the amount of substance containing the Avogadro constant number of atoms,molecules o…
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