Question

Визначте молекулярну формулу насиченоговуглеводню відносна пухлина перша якого за воднем 57​

Answer 1

Ответ:

Объяснение:

DH2 (CnH2n+2) = M(CnH2n+2)/M(H2) = 57/2 = 28.5

14n+2 = 28.5

14n = 28.5-2

14n = 26.5

n =26.5/14 = 1.9≈2

Answer 2

Molecular Formula of Saturated Hydrocarbon with Relative Density 57

The molecular formula of a saturated hydrocarbon can be determined using its relative density. The relative density, also known as specific gravity, is the ratio of the density of a substance to the density of a reference substance, usually water. In this case, the relative density of the saturated hydrocarbon is given as 57 times that of water.

To determine the molecular formula, we can use the concept of molar mass and the relative density of the substance. The molar mass of a compound is the mass of one mole of the substance and is expressed in grams per mole (g/mol). By comparing the relative density of the substance to that of water, we can calculate the molar mass and subsequently determine the molecular formula.

The molar mass of water is approximately 18 g/mol, so the molar mass of the saturated hydrocarbon can be calculated using the given relative density.

Calculation: Relative density of the saturated hydrocarbon = 57 Molar mass of water = 18 g/mol

Using the relationship between relative density and molar mass: Molar mass of the saturated hydrocarbon = 18 g/mol * 57 = 1026 g/mol

Now, to determine the molecular formula, we need to find the empirical formula first. The empirical formula represents the simplest whole-number ratio of the atoms in a compound.

The molecular formula can then be determined by comparing the molar mass of the compound to the molar mass of its empirical formula.

Given the relative density of the saturated hydrocarbon, the molar mass, and the concept of empirical and molecular formulas, the molecular formula of the saturated hydrocarbon can be calculated.