Answer to Question #289278 in Chemistry for LGS

Question

Find the mass in grams of 2.00 x 10^23 molecules of F2

Answer 1

Solution:

One mole of any substance contains 6.02×10²³ particles.

Thus, one mole of F₂ contains 6.02×10²³ molecules of F₂.

There are 2.00×10²³ molecules of F₂

Hence,

Moles of F₂ = ( 2.00×10²³ molecules) × (1 mol / 6.02×10²³ molecules) = 0.332 moles

The molar mass of F₂ is 38 g/mol

Hence,

Mass of F₂ = (0.332 mol) × (38 g / 1 mol) = 12.616 g = 12.62 g

Answer: 12.62 grams of F₂