Basically since there’s 2 hydrogen’s there will be two H’s on either side of your other element. And Se is in group 6 which means it has 6 valence electrons. When you combine 6 and 2 from the hydrogen you get 8. You then should place 8 dots around Se two on each side.
So something like H Se(with 8 dogs around it) H
Answer:
Pencil is an element and a heterogeneous mixture
Explanation:
The answer is C, they are found in the outermost layer of the atom. hope this helps, have an amazing day :)
Answer:
the pressure would be 0.9 atmospheres
Explanation:
you just gotta add the presures for each of the gases that are added
Au2S is =<u><em> 426 g/mol</em></u> for molar mass
