I believe that the answer would be D, both the speaker and the microphone
Answer:
The best answer is A.
(Newton’s “Mathematica” is not exactly new, and not filled with errors).
Explanation:
No that’s is the electronic configuration for fluorine.
Aluminum sulfide is Al₂S₃, which shows that there are 3
sulfur atoms per formula unit.
In one mole there is Avogadro’s number of atoms and Avogadro’s
number = 6.02 x 10²³
In 1.10 mole = 1.10 x 6.02x10²³ = 6.62 x 10²³ formula units
Now multiply with 3 to get number of sulfur atoms present in
1.10 mol of Aluminum sulfide;
3 x 6.62x10²³ = 1.99 x 10²⁴
So, the answer is 1.99 x 10²⁴ sulfur atoms.