Question

Из 10,8 г Al при направлении с избытком С получили 13,2 г AL4C3 Определить массу доли % ?AL+?C - AL4C3 M(AL4C3)=4*Aw*(AL)+3*Aw(C)=ПОМОГИТЕ ПОЖАЛУЙСТА! ОЧЕНЬ НАДО!((

Answer 1

СЛОЖНАЯ ЗАДАЧКА, А ЧТО НАЙТИ НАДО?

Answer 2

Calculation of the Mass Percentage of Al and C in Al4C3

To determine the mass percentage of Al and C in Al4C3, we need to calculate the molar mass of Al4C3 and then find the mass of Al and C in the compound.

The molar mass of Al4C3 can be calculated as follows:

M(Al4C3) = 4 * M(Al) + 3 * M(C)

Where M(Al) is the molar mass of aluminum and M(C) is the molar mass of carbon.

According to the periodic table, the molar mass of aluminum (Al) is approximately 26.98 g/mol, and the molar mass of carbon (C) is approximately 12.01 g/mol.

Let's calculate the molar mass of Al4C3:

M(Al4C3) = 4 * 26.98 g/mol + 3 * 12.01 g/mol

M(Al4C3) = 107.92 g/mol + 36.03 g/mol

M(Al4C3) = 143.95 g/mol

Now, let's calculate the mass of Al and C in Al4C3 using the given information:

Mass of Al = 10.8 g Mass of Al4C3 = 13.2 g

To find the mass of C, we can subtract the mass of Al from the mass of Al4C3:

Mass of C = Mass of Al4C3 - Mass of Al

Mass of C = 13.2 g - 10.8 g

Mass of C = 2.4 g

To calculate the mass percentage of Al and C in Al4C3, we can use the following formulas:

Mass percentage of Al = (Mass of Al / Mass of Al4C3) * 100

Mass percentage of C = (Mass of C / Mass of Al4C3) * 100

Let's calculate the mass percentages:

Mass percentage of Al = (10.8 g / 13.2 g) * 100

Mass percentage of Al ≈ 81.82%

Mass percentage of C = (2.4 g / 13.2 g) * 100

Mass percentage of C ≈ 18.18%

Therefore, the mass percentage of Al in Al4C3 is approximately 81.82%, and the mass percentage of C is approximately 18.18%.

Please note that the calculations provided are based on the given information and the molar masses of aluminum and carbon from the periodic table.