Question

1-An empirical formula of compound is C 7 H 9 O and its molecular mass is 216g/mol.Find its molecular formula.

Answer 1

Step-by-step explanation:

mass/molar mass=n

molecular formula=n×empirical formula...

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Answer 2

Answer:

C₁₄H₁₈O₂

Step-by-step explanation:

molar mass of C7H9O=84+9+16=109g/mol

molar mass of reqd. compound=216g/mol

no. of moles=216/109≈2 moles

Reqd. Molecular formula=(C₇H₉O₂)₂

                                        =C₁₄H₁₈O₂

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