Find the mass in grams of
2 x 10^23 of F2 (12.6 grams of F2)
a mole is Avogadro's number
... 6.02 x 10^23
so you need the mass of a third of a mole of F₂
the molar mass of F₂ is 38 g
To find the mass in grams of 2 x 10^23 molecules of F2, you need to use Avogadro's number. The Avogadro's number is approximately 6.022 x 10^23, and it represents the number of particles, such as atoms or molecules, in one mole of substance.
First, let's calculate the number of moles of F2 using the given number of molecules (2 x 10^23) and Avogadro's number:
Number of moles = Number of molecules / Avogadro's number
Number of moles = 2 x 10^23 / 6.022 x 10^23
Number of moles ≈ 0.3318 moles
Since we know that 12.6 grams of F2 is equivalent to 1 mole, we can use this information to calculate the mass of the given number of molecules:
Mass in grams = Number of moles × Molar mass
Mass in grams = 0.3318 moles × 12.6 grams/mole
Mass in grams ≈ 4.1771 grams
Therefore, the mass in grams of 2 x 10^23 molecules of F2 is approximately 4.1771 grams.