Question

Сколько атомов кальция содержится в 80г. кальция? Пожалуйста помогите!

Answer 1

Если я не ошибаюсь, то 2

Answer 2

Calculation of Calcium Atoms in 80g of Calcium

To calculate the number of atoms in 80g of calcium, we can use the following steps:

1. Calculate the molar mass of calcium (Ca). 2. Use Avogadro's number to convert the mass of calcium to the number of atoms.

Molar Mass of Calcium (Ca)

The molar mass of calcium (Ca) is approximately 40.08 g/mol.

Conversion to Number of Atoms

Using Avogadro's number, 1 mole of any substance contains 6.022 x 10^23 atoms. Therefore, to find the number of atoms in 80g of calcium, we can use the following calculation:

Number of moles = Mass / Molar mass Number of atoms = Number of moles * Avogadro's number

Let's perform the calculation:

Number of moles of calcium = 80g / 40.08 g/mol Number of atoms = Number of moles * 6.022 x 10^23

Result

The number of atoms in 80g of calcium is approximately 1.20 x 10^24 atoms.

I hope this helps! If you have any further questions, feel free to ask.