Silver. It is number 47 on the periodic table meaning it has 47 protons. It’s atomic mass is 108. 47+61=108 so it is definitely silver
The molar mass of K is 39, Cr is 52, and O is 16. The rough calculation of these numbers are 294.
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.
All you haft to do is mutiply and see how many points there are