Determine the formula of a substance consisting of carbon and hydrogen atoms

Determine the formula of a substance consisting of carbon and hydrogen atoms, the vapor density of which for hydrogen is 8.

Since the substance is composed of hydrogen and carbon, therefore, the general formula is as follows: CxHy.

Next, determine the molar mass of this substance, for this use the following formula:
M (CxHy) = 2 * D.

Where M is the molar mass of the substance;

D is the hydrogen density of the substance.

Further, in order to calculate the molar mass of a given substance, it is necessary to substitute known values ​​in this formula. Write down the solution.
M (CxHy) = 2 * 8 = 16 g / mol.

Therefore, the molar mass of this substance is 16 g / mol.

M (CH4) = 12 + 4 * 1 = 16 g / mol.

This means that the formula of this substance is CH4, therefore, this substance is called methane.

Answer: CH4 methane.



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