The gas consists of 85.71% C and 14.29% H. The hydrogen density of this gas is 14. Write the molecular

| April 3, 2021 | education

The gas consists of 85.71% C and 14.29% H. The hydrogen density of this gas is 14. Write the molecular and structural formulas.

The task begins with the fact that there is a mass of gas. If it is known that the mass of gas behind hydrogen is 14, then the mass of gas is 14 * 2 = 28 grams / mol. Carbon can form a maximum of four bonds, from which we conclude that there are two of its atoms and the formula of the substance in this case has the form C2H4 (the mass of carbon is 12, if there are two carbon atoms, then the mass is 24, the rest of the mass comes to hydrogen atoms). We check the correctness of our assumption. 28 grams (mass of the compound) – 100%, and 24 grams (mass of carbon) – X; hence X = 24 * 100/28; X = 85.71% – carbon in the compound, the remaining 14.29% – hydrogen.



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