Question

Молярная масса какого алкина= 68 г/моль?

Answer 1

Общая формула Алкинов СnH2n-2
5*12=60 8*1=8. Исходя из этого следует, что Молярная масса С5H8 =68г/моль

Answer 2

Молярная масса алкина равна 68 г/моль.

Calculation of Molar Mass of Alkyne

To determine the molar mass of an alkyne, we need to know the molecular formula of the alkyne in question. Alkynes are hydrocarbons with a triple bond between two carbon atoms. The general formula for an alkyne is CnH2n-2, where n represents the number of carbon atoms in the molecule.

In this case, we don't have the specific molecular formula of the alkyne. However, we can use the given molar mass of 68 g/mol to estimate the number of carbon atoms in the molecule.

The molar mass of an alkyne can be calculated by adding the atomic masses of the constituent elements. The atomic mass of carbon (C) is approximately 12.01 g/mol. Since the alkyne contains only carbon and hydrogen (H), we can assume that the molar mass is primarily due to carbon.

Let's assume that the alkyne has n carbon atoms. The molar mass of the alkyne can then be calculated as follows:

Molar mass of alkyne = (n * atomic mass of carbon) + (2n-2 * atomic mass of hydrogen)

We can rearrange this equation to solve for n:

n = (Molar mass of alkyne - (2n-2 * atomic mass of hydrogen)) / atomic mass of carbon

Substituting the given molar mass of 68 g/mol and the atomic masses of carbon and hydrogen, we can solve for n:

n = (68 - (2n-2 * 1.01)) / 12.01

Simplifying the equation:

n = (68 - 2.02n + 2.02) / 12.01

n = (70.02 - 2.02n) / 12.01

12.01n = 70.02 - 2.02n

14.03n = 70.02

n ≈ 4.99

Since the number of carbon atoms must be a whole number, we can round n to the nearest whole number. Therefore, the alkyne in question likely contains approximately 5 carbon atoms.

Please note that this is an estimation based on the given molar mass. Without the specific molecular formula, we cannot determine the exact number of carbon atoms in the alkyne.

Conclusion

The molar mass of the alkyne is approximately 68 g/mol. The alkyne likely contains approximately 5 carbon atoms, based on the given molar mass of 68 g/mol and the assumption that the molar mass is primarily due to carbon.