Question

Обчислити кількість молекул у 3 моль Na2CO2

Answer 1

N=n*NA      N(Na2CO3)=3*6,02*1023=18,06*1023(молекул)
Ответ:18,06*1023 молекул

Answer 2

Calculating the Number of Molecules in 3 Moles of Na2CO2

To calculate the number of molecules in 3 moles of Na2CO2, we can use Avogadro's number, which represents the number of atoms or molecules in one mole of a substance.

Avogadro's number is approximately 6.022 x 10^23 molecules/mol.

First, we need to determine the number of molecules in 1 mole of Na2CO2, and then we can multiply that by 3 to find the number of molecules in 3 moles.

Number of Molecules in 1 Mole of Na2CO2

The molar mass of Na2CO2 can be calculated by adding the atomic masses of its constituent elements: sodium (Na), carbon (C), and oxygen (O).

- Sodium (Na) has an atomic mass of approximately 22.99 g/mol. - Carbon (C) has an atomic mass of approximately 12.01 g/mol. - Oxygen (O) has an atomic mass of approximately 16.00 g/mol.

Using these atomic masses, we can calculate the molar mass of Na2CO2.

The molar mass of Na2CO2 = (2 * atomic mass of Na) + atomic mass of C + (2 * atomic mass of O)

Now, let's calculate the molar mass of Na2CO2.

Molar mass of Na2CO2 = (2 * 22.99 g/mol) + 12.01 g/mol + (2 * 16.00 g/mol)

Molar mass of Na2CO2 = 45.98 g/mol + 12.01 g/mol + 32.00 g/mol Molar mass of Na2CO2 = 89.99 g/mol

So, the molar mass of Na2CO2 is approximately 89.99 g/mol.

Now, we can use Avogadro's number to calculate the number of molecules in 1 mole of Na2CO2.

Number of molecules in 1 mole of Na2CO2 = Avogadro's number / molar mass of Na2CO2 Number of molecules in 1 mole of Na2CO2 = (6.022 x 10^23 molecules/mol) / 89.99 g/mol Number of molecules in 1 mole of Na2CO2 ≈ 6.691 x 10^21 molecules

Number of Molecules in 3 Moles of Na2CO2

To find the number of molecules in 3 moles of Na2CO2, we can simply multiply the number of molecules in 1 mole by 3.

Number of molecules in 3 moles of Na2CO2 = (6.691 x 10^21 molecules) * 3 Number of molecules in 3 moles of Na2CO2 ≈ 2.007 x 10^22 molecules

Therefore, there are approximately 2.007 x 10^22 molecules in 3 moles of Na2CO2.