I will mark brainliest for the first answerII. Classify the following substances into elements, compounds and mixtures. Air, Sea water, Sugar, Salt solution, Water, 22 karat Gold, Calcium Oxide, Brass, Hydrogen, Smoke, Salt, Carbon dioxide, Helium, Nitrogen.

I will mark brainliest for the first answerII. Classify the following

1.	I will mark brainliest for the first answerII. Classify the following substances into elements, compounds and mixtures. Air, Sea water, Sugar, Salt solution, Water, 22 karat Gold, Calcium Oxide, Brass, Hydrogen, Smoke, Salt, Carbon dioxide, Helium, Nitrogen.
Answer» Element - helium , nitrogen , HYDROGEN compound - WATER , calcium oxide , carbon dioxide , sugar , salt mixture - air , SEA water , salt sol. , 22 KARAT GOLD , brass , smoke