Respuesta :

Answer: 1 mole ➡️ 6.022×10²³ atoms of si.

X mole ➡️ 2.8×10²⁴ atoms of si.

X = 2.8×10×10²³/6.022×10²³

= 28/6.022

= 4.65 moles.

Explanation:

The total number of moles in 2.8x10^23 atoms of Calcium will be 4.65 moles.

What is a  mole?

The mole is defined as the amount of substance containing the same number of chemical units (atoms, molecules, ions, electrons, or other specified entities or groups of entities) as exactly 12 grams of carbon-12

The mole unit allows us to express amounts of atoms and molecules in visible amounts that we can understand.

For example, we already know that, by definition, a mole of carbon has a mass of exactly 12 g. This means that exactly 12 g of C has 6.022 × 10 23 atoms

1 mole is  6.022×10²³ atoms of calcium

one mole of calcium =  2.8×10²⁴

substitute the value in the equation,

2.8×10²⁴ atoms of calcium  = 2.8×10×10²³/6.022×10²³

total number of moles = 28/6.022= 4.65 moles

Therefore, the total number of moles will be 4.65 moles

learn more about moles, here:

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