Homework Answers
Ans 1 :
Number of mol of phosphorus = mass / molar mass
= 3.45 g / 30.97 g/mol = 0.111 mol
Mol chlorine = 19.75 g / 35.453 g/mol = 0.557 mol
dividing the number of moles by a common value we get the ratio of number of moles as 1 : 5
so the empirical formula of compound will be : PCl5
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