Question

Определите молекулярную формулу алкана,когда известно ,что его молярная масса ровна 156г/моль.Назовите полученный алкан

Answer 1

CnH2n+2=156
12n+2n+2=156
14n=154
n=11(C11H24)

C11H24=12×11+1×24=156гр/моль.

Answer 2

Molecular Formula and Name of the Alkane

To determine the molecular formula and name of an alkane when its molar mass is known, we need to consider the relationship between the molar mass and the number of carbon and hydrogen atoms in the alkane.

The molar mass of the alkane is given as 156 g/mol. However, the search results provided do not contain any relevant information to determine the molecular formula and name of the alkane. Therefore, I will provide a general explanation of how to determine the molecular formula and name of an alkane based on its molar mass.

To determine the molecular formula of an alkane, we need to consider that alkanes are hydrocarbons consisting of only carbon and hydrogen atoms. The general formula for alkanes is CnH2n+2, where "n" represents the number of carbon atoms in the alkane.

To find the value of "n" (the number of carbon atoms), we can use the molar mass of the alkane. The molar mass of an alkane is the sum of the atomic masses of all the carbon and hydrogen atoms in the molecule.

Let's assume the molar mass of the alkane is 156 g/mol. We can set up the following equation to find the value of "n":

Molar mass of the alkane = (n * atomic mass of carbon) + (2n + 2) * atomic mass of hydrogen

156 g/mol = (n * 12.01 g/mol) + (2n + 2) * 1.01 g/mol

Simplifying the equation, we get:

156 = 12.01n + 2.02n + 2.02

156 = 14.03n + 2.02

154.98 = 14.03n

n ≈ 11

Therefore, the molecular formula of the alkane is C11H24. However, without additional information, it is not possible to determine the specific name of the alkane.

Please note that the search results provided do not contain relevant information for this specific question. The explanation provided is based on general knowledge of alkane molecular formulas and molar masses.