What is the mass of a 3.5 l sample of a liquid that has a density of 1.2 g/ml?

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!