The mass for carbon in organic compounds is 83.4%, the relative air density of this substance

| January 30, 2021 | education

The mass for carbon in organic compounds is 83.4%, the relative air density of this substance is CxHy = 2.483 (M (air) = 29. Determine the formula of the substance?

The relative density of a substance allows you to find the molar mass of this substance through the density of another substance. If we multiply the molar mass of air by the density and relative to the air, then we get that the molar mass of organic matter is 72 g per mole further We make the equation 72 = 12x / 0.834. For X, we take the number of carbon atoms in organic matter. If we multiply 12 by the number of carbon atoms, then we get How many grams per mole does carbon weigh. If we divide this number by the percentage of carbon, then we get the molar mass of the whole substance. Having found X, I understand that the number of carbon atoms is 5. Therefore, this is pentane C5 h12.



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