The formula is HgS
Hope this helps :D
Mass of Aluminum (in g) : 4.104
<h3>Further explanation</h3>
Reaction
2 Al(s) + 6 HCl(aq) → 2 AICI₃ (aq) + 3 H₂(g)
mol HCl :

mol Al :

mass of Aluminum :

Answer:
satellites communicate by using radio waves to send signals to the antennas on the Earth. the antennas then capture those signals and process the information coming from those signals.
hope this helps:)