Question

How many molecules of H20 are equivalent to 97.2 g H20 (H= 1.008 g/mol, O= 16.00 g/mol) [?]x10molecules?

Answer 1

To determine the number of molecules of H₂O equivalent to 97.2 g, you can use the molar mass of H₂O as a conversion factor to convert grams to moles. Then, use Avogadro's number to calculate the number of molecules.

Step-by-step explanation:

To determine the number of molecules of H₂O equivalent to 97.2 g, we need to use the concept of moles. The molar mass of H₂O is 18.015 g/mol. We can use this molar mass as a conversion factor to convert grams to moles. Since we want to know the number of molecules, we can use Avogadro's number, which is approximately 6.022 x 10²³ molecules/mol:

97.2 g H₂O x (1 mol/18.015 g) x (6.022 x 10²³ molecules/1 mol)

= 3.20 x 10²⁴ molecules