Sulfuric Acid
Sulphuric Acid
Mix sulfur and acid and you'll get sulfuric acid! That's how science works! How simple!
りゅうさん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
どこで硫酸を手に入れたんだ。
Where did you get your hands on some sulfuric acid?