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Chemistry: finding the molecular formula of a compound?

An unknown compound is found to have an approximate molar mass of 248 g/mol and an empirical formula of CH3OWhat is the molecular formula of this compound?2 Al + 3 H2SO4 -gt; Al2(SO4)3 + 3 H2Can someone please help me understand how to do this step-by-step?

Answer:

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Ignoring the aluminum equation: CH3O 31.0339 g/mol (248 g/mol ) / (31.0339 g/mol) 7.99 Round to the nearest whole number: 8 So multiply the empirical formula by 8: C8H24O8

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