Answer to Question #88161 in General Chemistry for Kori

Question

Find the mass in grams of 5.50 x 10^23 molecules of F2

Answer 1

According to the moles-mass equation:

m = n × Mr = (N/N_A) × Mr,

where n - number of moles, Mr - molecular weight, N - number of molecules, N_A - Avogadro's number.

Here, N = 5.50 × 10²³, Mr = 38 g/mol, N_A = 6.022 × 10²³.

As a result, the mass of F₂ equals:

m = (5.50 × 10²³ / 6.022 × 10²³) × 38 g/mol = 0.913 mol × 38 g/mol = 34.7 g.

Answer: 34.7g of F₂.