Question

Сколько атомов содержится в куске меди объемом V=1 см3, если плотность меди равна 9 г/см3? Оцените среднее расстояние между атомами меди

Answer 1

дано
V=1 см3,
р =9 г/см3
Na = 6.022*10^23 моль-1
M=63.5 г/моль
найти N - ?
решение
масса m = V*p
количество молей v =m/M =V*p/M
количество атомов N=Na*v=Na*V*p/M =6.022*10^23 *1*9/63.5=8.35*10^22 атомов

Answer 2

Number of Atoms in a Copper Sample

To determine the number of atoms in a copper sample with a volume of V = 1 cm^3 and a density of 9 g/cm^3, we can use the formula:

Number of atoms = (mass of the sample / molar mass of copper) * Avogadro's number.

First, let's calculate the mass of the copper sample. We know that the density of copper is 9 g/cm^3, and the volume of the sample is 1 cm^3. Using the formula:

Mass = density * volume,

we can calculate the mass of the copper sample:

Mass = 9 g/cm^3 * 1 cm^3 = 9 g.

Next, we need to find the molar mass of copper. The molar mass of an element is the mass of one mole of atoms of that element. The molar mass of copper is approximately 63.55 g/mol.

Now, we can calculate the number of atoms in the copper sample:

Number of atoms = (9 g / 63.55 g/mol) * 6.022 x 10^23 atoms/mol.

Calculating this expression gives us the number of atoms in the copper sample.

Average Distance Between Copper Atoms

To estimate the average distance between copper atoms, we can use the formula:

Average distance = (volume of the sample / number of atoms)^(1/3).

We already know that the volume of the sample is 1 cm^3 and we have calculated the number of atoms in the previous section.

Using this formula, we can estimate the average distance between copper atoms.

Please note that this estimation assumes that the copper atoms are arranged in a regular lattice structure, which may not be the case in reality. The actual arrangement of atoms in a solid material can be more complex.

I hope this helps! Let me know if you have any further questions.