Hello there!
To solve this question, we are going to use the Avogadro's Number. The Avogadro's Number (6,02*10²³ molecules/mol) tells us how many molecules are in a mole of any given substance.
For 4,64 * 10²⁵ atoms of H₂CO₃, we can use the following conversion factor:
[tex]4,64*10^{25} molecules H_2CO_3* \frac{1 mol H_2CO_3}{6,02*10^{23} molecules}=77,08 moles[/tex]
So, there are 77,08 moles of H₂CO₃
Have a nice day!
