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12. Octane, a compound of hydrogen and carbon, has a molar mass of 114.26 g/mol. If one mole of the compound contains 18.17 g of hydrogen, what is its molecular formula?

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This problem is providing information about the molar mass of octane, which is 114.26 g/mol and the mass of hydrogen that is in there, 18.17 g, it means we conclude that the molecular formula is C₈H₁₈ according to the following:

Molecular formulas:

In chemistry, we define molecular formulas as those containing the types and number of atoms a compound has, according to the elements across the periodic table and the subscripts it has, standing for the number of each atom in the formula.

Calculation:

In this case, we note that 18.17 g out of 114.26 g in one mole of octane is related to hydrogen, which means that the mass of carbon is 96.09 g in one mole of octane. Next, we divide the mass of each atom by the corresponding atomic mass in order to calculate the subscript in the formula:

[tex]H:\frac{18.17}{1.01}=18\\\\C:\frac{96.09}{12.01} =8[/tex]

Therefore, the resulting formula is C₈H₁₈

Learn more about molecular formulas: https://brainly.com/question/1247523

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