I believe it would be the last one because you can use the molar mass of HCl to find the number of moles, then use Avogadro’s number to find the number of atoms
Hope this helps!
I’m not sure about the first question but fossil fuels are like coal oil natural gases etc etc
The correct answer is false because there isn’t 4 there is 8 atoms
He is seeing the corona it's the crown like layer that you see when there is a solar eclipse ☀️
1) acid
2) ether
3) ester
4) aldehyde
5) ketone
6) amine
7) alcohol