Finding molecular formula from empirical formula and molar mass

jais · Oct 18, 2006

A compound has the empirical formula CNH4. If 0.2 mol of its molecules has the mass 12.0 g, what is the molecular formula?

lkh1986 · Oct 20, 2006

0.2 mol = 12.0g
From here, you can calculate 1 mol=60g.

Then, 60 = (12+14+4)n, where 12+14+4 are the molar mass of CNH4. Then, you obtain the value of n. Times the value of n into CNH4, you would obtain its molecular formula.

Finding molecular formula from empirical formula and molar mass

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