Molecular Formula of CNH4: 12g & 0.2mol

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SUMMARY

The molecular formula of the compound with the empirical formula CNH4 is determined to be C3N3H12. Given that 0.2 mol of the compound has a mass of 12.0 g, the molar mass is calculated to be 60 g/mol. This is derived from the equation 60 = (12 + 14 + 4)n, where 12, 14, and 4 represent the atomic masses of carbon, nitrogen, and hydrogen, respectively. By solving for n and multiplying it by the empirical formula, the molecular formula is established.

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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?
 
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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.
 

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