I think the answer would be B. She never stated her hypothesis and her problem. Hope I didn't give you the wrong answer. :)
Mass of the compound = 205 g
Molar Mass of compound = ((24) + (2 * 32) + (3 * 16))
= 136 g / mol
∴ # mols in 205g =
= 1.507 mol
A particle is a minute fragment or quantity of matter. In the physical sciences, a particle is a small localized object to which can be ascribed several physical or chemical properties such as volume or mass. ... The term is rather general in meaning, and is refined as needed by various scientific fields.
A +1 ion https://quizlet.com/253790701/icy-spice-flash-cards/
I think you just multiply the numbers (3.8 Times 1024)
And you get 3,891.2