Question

Определите массу порции хлороводорода, к которой содержится такое же число всех атомов, как и в 12,7 г хлорида железа (II). Ответ запишите полностью.

Answer 1

M(FeCL3)= 56+35.5*3=162.5 г/моль
n((FeCL3)=12.7/ 162.5=0.078 моль
N= n*Na= 0.078* 6*10 23= 4.62*10 22
M(HCL)= 36/5 г/моль
N=m/M*Na    4.62*10 22=  m/ 36.5* 6* 10 23=
m=2.8105 г (HCL)
Ответ: 2.8 г (HCL)

Answer 2

Calculation of the Mass of Hydrochloric Acid

To determine the mass of a portion of hydrochloric acid that contains the same number of atoms as 12.7 grams of iron(II) chloride, we need to consider the molar masses and the stoichiometry of the compounds involved.

The molar mass of hydrochloric acid (HCl) is the sum of the molar masses of hydrogen (H) and chlorine (Cl). The molar mass of hydrogen is approximately 1.008 grams per mole, and the molar mass of chlorine is approximately 35.453 grams per mole.

The molar mass of iron(II) chloride (FeCl2) is the sum of the molar masses of iron (Fe) and chlorine (Cl). The molar mass of iron is approximately 55.845 grams per mole, and the molar mass of chlorine is approximately 35.453 grams per mole.

To find the mass of hydrochloric acid that contains the same number of atoms as 12.7 grams of iron(II) chloride, we can set up a proportion using the molar masses and the stoichiometry of the compounds:

(Mass of HCl) / (Molar mass of HCl) = (Mass of FeCl2) / (Molar mass of FeCl2)

Let's calculate the mass of hydrochloric acid:

(Mass of HCl) = (Mass of FeCl2) / (Molar mass of FeCl2) * (Molar mass of HCl)

Substituting the values:

(Mass of HCl) = (12.7 g) / (molar mass of FeCl2) * (molar mass of HCl)

Now, let's calculate the molar mass of FeCl2:

(Molar mass of FeCl2) = (Molar mass of Fe) + 2 * (Molar mass of Cl)

(Molar mass of FeCl2) = 55.845 g/mol + 2 * 35.453 g/mol

(Molar mass of FeCl2) = 126.751 g/mol

Substituting the molar mass of FeCl2 into the equation:

(Mass of HCl) = (12.7 g) / (126.751 g/mol) * (molar mass of HCl)

To find the molar mass of HCl, we add the molar masses of hydrogen and chlorine:

(Molar mass of HCl) = (Molar mass of H) + (Molar mass of Cl)

(Molar mass of HCl) = 1.008 g/mol + 35.453 g/mol

(Molar mass of HCl) = 36.461 g/mol

Substituting the molar mass of HCl into the equation:

(Mass of HCl) = (12.7 g) / (126.751 g/mol) * (36.461 g/mol)

Now, let's calculate the mass of hydrochloric acid:

(Mass of HCl) = (12.7 g) / (126.751 g/mol) * (36.461 g/mol)

Calculating this expression gives us the mass of hydrochloric acid that contains the same number of atoms as 12.7 grams of iron(II) chloride.

Please note that the calculation provided above is based on the assumption that the number of atoms in both compounds is the same. However, it is important to verify this assumption with additional information or experimental data.