A tiny speck (8.3*10^-⁷ mol) of radioactive Americium-241 is used in smoke detectors. How many atoms of Americium-241 are there in one of these smoke detectors?

Question

Quizplus · Accepted Answer

The number of atoms in a sample can be calculated using Avogadro's number, which is 6.022 x 10^23 atoms per mole. To find the number of atoms in the sample, multiply the number of moles by Avogadro's number.Number of atoms = (8.3 x 10^-7 mol) x (6.022 x 10^23 atoms/mol) = 5.0 x 10^17 atomsTherefore, the correct answer is A) 5.0 x 10^17.

A Tiny Speck (8