Chemistry Molecular Formula of CNH4: 12g & 0.2mol

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The compound with the empirical formula CNH4 has a mass of 12.0 g for 0.2 mol, leading to a molar mass of 60 g per mole. By calculating the molar mass from the empirical formula, which totals 30 g (12 for carbon, 14 for nitrogen, and 4 for hydrogen), the value of n is determined to be 2. Multiplying the empirical formula by n results in the molecular formula C2N2H8. Therefore, the molecular formula of the compound is C2N2H8.
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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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