Question

How many molecules are in 1.75 moles of Caco3?

1.75 molecules
3.440 x 1023 molecules
1.054 x 1024 molecules
O 2.907 x 10-24 molecules

Answer 1

1.054 x 10²⁴ molecules

Step-by-step explanation:

In order to convert moles of any given substance into a number of molecules, we need to use Avogadro's number, which states the number of molecules -or atoms, in the case of elements- present in one mol:

• In one mol there are 6.023x10²³ molecules.

We now convert 1.75 moles into molecules:

• 1.75 mol * 6.023x10²³ molecules/mol = 1.05x10²⁴ molecules